diff --git a/composer.json b/composer.json
index c88ca4563c73..84a4a763f4d4 100644
--- a/composer.json
+++ b/composer.json
@@ -24,6 +24,9 @@
         "twig/twig": "~1.28|~2.0",
         "psr/log": "~1.0"
     },
+    "conflict": {
+        "phpunit/phpunit": "<4.8.35|<5.4.3,>=5.0"
+    },
     "replace": {
         "symfony/asset": "self.version",
         "symfony/browser-kit": "self.version",
diff --git a/phpunit b/phpunit
index 1e79197e316d..07c45b759d88 100755
--- a/phpunit
+++ b/phpunit
@@ -1,7 +1,7 @@
 #!/usr/bin/env php
 <?php
 
-// Cache-Id: https://github.com/symfony/phpunit-bridge/commit/4f2aa873d2872a3b9782b25879fd628a0c418bc9
+// Cache-Id: https://github.com/symfony/phpunit-bridge/commit/d3157d942a4590121dfd23f9cadf519ca6ad4ac7
 
 if (!file_exists(__DIR__.'/vendor/symfony/phpunit-bridge/bin/simple-phpunit')) {
     echo "Unable to find the `simple-phpunit` script in `vendor/symfony/phpunit-bridge/bin/`.\nPlease run `composer update` before running this command.\n";
diff --git a/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php b/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php
index 962099e36a7b..1a97922b05f8 100644
--- a/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php
+++ b/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php
@@ -14,6 +14,7 @@
 use Doctrine\Common\Annotations\AnnotationReader;
 use Doctrine\ORM\Mapping\Driver\AnnotationDriver;
 use Doctrine\ORM\EntityManager;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Provides utility functions needed in tests.
@@ -30,7 +31,7 @@ class DoctrineTestHelper
     public static function createTestEntityManager()
     {
         if (!extension_loaded('pdo_sqlite')) {
-            \PHPUnit_Framework_TestCase::markTestSkipped('Extension pdo_sqlite is required.');
+            TestCase::markTestSkipped('Extension pdo_sqlite is required.');
         }
 
         $config = new \Doctrine\ORM\Configuration();
diff --git a/src/Symfony/Bridge/Doctrine/Tests/ContainerAwareEventManagerTest.php b/src/Symfony/Bridge/Doctrine/Tests/ContainerAwareEventManagerTest.php
index 55991dbf4f65..f40d1ca710ed 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/ContainerAwareEventManagerTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/ContainerAwareEventManagerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bridge\Doctrine\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\ContainerAwareEventManager;
 use Symfony\Component\DependencyInjection\Container;
 
-class ContainerAwareEventManagerTest extends \PHPUnit_Framework_TestCase
+class ContainerAwareEventManagerTest extends TestCase
 {
     private $container;
     private $evm;
diff --git a/src/Symfony/Bridge/Doctrine/Tests/DataCollector/DoctrineDataCollectorTest.php b/src/Symfony/Bridge/Doctrine/Tests/DataCollector/DoctrineDataCollectorTest.php
index 6fa34345cd4a..3059f8aba00a 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/DataCollector/DoctrineDataCollectorTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/DataCollector/DoctrineDataCollectorTest.php
@@ -12,11 +12,12 @@
 namespace Symfony\Bridge\Doctrine\Tests\DataCollector;
 
 use Doctrine\DBAL\Platforms\MySqlPlatform;
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\DataCollector\DoctrineDataCollector;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 
-class DoctrineDataCollectorTest extends \PHPUnit_Framework_TestCase
+class DoctrineDataCollectorTest extends TestCase
 {
     public function testCollectConnections()
     {
diff --git a/src/Symfony/Bridge/Doctrine/Tests/DataFixtures/ContainerAwareLoaderTest.php b/src/Symfony/Bridge/Doctrine/Tests/DataFixtures/ContainerAwareLoaderTest.php
index 77d89088d2b1..422c459b46af 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/DataFixtures/ContainerAwareLoaderTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/DataFixtures/ContainerAwareLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bridge\Doctrine\Tests\DataFixtures;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\DataFixtures\ContainerAwareLoader;
 use Symfony\Bridge\Doctrine\Tests\Fixtures\ContainerAwareFixture;
 
-class ContainerAwareLoaderTest extends \PHPUnit_Framework_TestCase
+class ContainerAwareLoaderTest extends TestCase
 {
     public function testShouldSetContainerOnContainerAwareFixture()
     {
diff --git a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPassTest.php b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPassTest.php
index ba73678541e7..757fdc07e6f3 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPassTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPassTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Bridge\Doctrine\Tests\DependencyInjection\CompilerPass;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\DependencyInjection\CompilerPass\RegisterEventListenersAndSubscribersPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
 
-class RegisterEventListenersAndSubscribersPassTest extends \PHPUnit_Framework_TestCase
+class RegisterEventListenersAndSubscribersPassTest extends TestCase
 {
     /**
      * @expectedException \InvalidArgumentException
diff --git a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php
index f917f73eaa15..6017036f7637 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bridge\Doctrine\Tests\DependencyInjection;
 
+use Symfony\Bundle\FrameworkBundle\Tests\TestCase;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
@@ -18,7 +19,7 @@
 /**
  * @author  Fabio B. Silva <fabio.bat.silva@gmail.com>
  */
-class DoctrineExtensionTest extends \PHPUnit_Framework_TestCase
+class DoctrineExtensionTest extends TestCase
 {
     /**
      * @var \Symfony\Bridge\Doctrine\DependencyInjection\AbstractDoctrineExtension
diff --git a/src/Symfony/Bridge/Doctrine/Tests/DoctrineOrmTestCase.php b/src/Symfony/Bridge/Doctrine/Tests/DoctrineOrmTestCase.php
index 283c65ee4d13..567b5a240c30 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/DoctrineOrmTestCase.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/DoctrineOrmTestCase.php
@@ -14,6 +14,7 @@
 @trigger_error('The '.__NAMESPACE__.'\DoctrineOrmTestCase class is deprecated since version 2.4 and will be removed in 3.0. Use Symfony\Bridge\Doctrine\Test\DoctrineTestHelper class instead.', E_USER_DEPRECATED);
 
 use Doctrine\ORM\EntityManager;
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\Test\DoctrineTestHelper;
 
 /**
@@ -22,7 +23,7 @@
  * @deprecated since version 2.4, to be removed in 3.0.
  *             Use {@link DoctrineTestHelper} instead.
  */
-abstract class DoctrineOrmTestCase extends \PHPUnit_Framework_TestCase
+abstract class DoctrineOrmTestCase extends TestCase
 {
     /**
      * @return EntityManager
diff --git a/src/Symfony/Bridge/Doctrine/Tests/ExpressionLanguage/DoctrineParserCacheTest.php b/src/Symfony/Bridge/Doctrine/Tests/ExpressionLanguage/DoctrineParserCacheTest.php
index e3d48a703062..d7abe2c75a54 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/ExpressionLanguage/DoctrineParserCacheTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/ExpressionLanguage/DoctrineParserCacheTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bridge\Doctrine\Tests\ExpressionLanguage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\ExpressionLanguage\DoctrineParserCache;
 
-class DoctrineParserCacheTest extends \PHPUnit_Framework_TestCase
+class DoctrineParserCacheTest extends TestCase
 {
     public function testFetch()
     {
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/DoctrineChoiceLoaderTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/DoctrineChoiceLoaderTest.php
index 98583b3bb13b..5999e8e58100 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/DoctrineChoiceLoaderTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/DoctrineChoiceLoaderTest.php
@@ -14,6 +14,7 @@
 use Doctrine\Common\Persistence\ObjectManager;
 use Doctrine\Common\Persistence\ObjectRepository;
 use Doctrine\ORM\Mapping\ClassMetadata;
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\Form\ChoiceList\DoctrineChoiceLoader;
 use Symfony\Bridge\Doctrine\Form\ChoiceList\EntityLoaderInterface;
 use Symfony\Bridge\Doctrine\Form\ChoiceList\IdReader;
@@ -23,7 +24,7 @@
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class DoctrineChoiceLoaderTest extends \PHPUnit_Framework_TestCase
+class DoctrineChoiceLoaderTest extends TestCase
 {
     /**
      * @var ChoiceListFactoryInterface|\PHPUnit_Framework_MockObject_MockObject
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/GenericEntityChoiceListTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/GenericEntityChoiceListTest.php
index f4530091fbb0..c976121f684b 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/GenericEntityChoiceListTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/GenericEntityChoiceListTest.php
@@ -16,13 +16,14 @@
 use Symfony\Bridge\Doctrine\Tests\Fixtures\SingleIntIdEntity;
 use Symfony\Bridge\Doctrine\Tests\Fixtures\SingleIntIdNoToStringEntity;
 use Symfony\Bridge\Doctrine\Form\ChoiceList\EntityChoiceList;
+use Symfony\Bundle\FrameworkBundle\Tests\TestCase;
 use Symfony\Component\Form\Extension\Core\View\ChoiceView;
 use Doctrine\ORM\Tools\SchemaTool;
 
 /**
  * @group legacy
  */
-class GenericEntityChoiceListTest extends \PHPUnit_Framework_TestCase
+class GenericEntityChoiceListTest extends TestCase
 {
     const SINGLE_INT_ID_CLASS = 'Symfony\Bridge\Doctrine\Tests\Fixtures\SingleIntIdEntity';
 
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php
index 1f07b8e465db..b14044fb2480 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bridge\Doctrine\Tests\Form\ChoiceList;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\Form\ChoiceList\ORMQueryBuilderLoader;
 use Symfony\Bridge\Doctrine\Test\DoctrineTestHelper;
 use Doctrine\DBAL\Connection;
 use Doctrine\ORM\Version;
 
-class ORMQueryBuilderLoaderTest extends \PHPUnit_Framework_TestCase
+class ORMQueryBuilderLoaderTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Form\Exception\UnexpectedTypeException
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/DataTransformer/CollectionToArrayTransformerTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/DataTransformer/CollectionToArrayTransformerTest.php
index 50b9bcd19e17..fa3ff911ad35 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/DataTransformer/CollectionToArrayTransformerTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/DataTransformer/CollectionToArrayTransformerTest.php
@@ -12,12 +12,13 @@
 namespace Symfony\Bridge\Doctrine\Tests\Form\DataTransformer;
 
 use Doctrine\Common\Collections\ArrayCollection;
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\Form\DataTransformer\CollectionToArrayTransformer;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class CollectionToArrayTransformerTest extends \PHPUnit_Framework_TestCase
+class CollectionToArrayTransformerTest extends TestCase
 {
     /**
      * @var CollectionToArrayTransformer
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/DoctrineOrmTypeGuesserTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/DoctrineOrmTypeGuesserTest.php
index f6b96bb2005e..12296729e2d8 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/DoctrineOrmTypeGuesserTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/DoctrineOrmTypeGuesserTest.php
@@ -12,11 +12,12 @@
 namespace Symfony\Bridge\Doctrine\Tests\Form;
 
 use Doctrine\Common\Persistence\Mapping\ClassMetadata;
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\Form\DoctrineOrmTypeGuesser;
 use Symfony\Component\Form\Guess\Guess;
 use Symfony\Component\Form\Guess\ValueGuess;
 
-class DoctrineOrmTypeGuesserTest extends \PHPUnit_Framework_TestCase
+class DoctrineOrmTypeGuesserTest extends TestCase
 {
     /**
      * @dataProvider requiredProvider
diff --git a/src/Symfony/Bridge/Doctrine/Tests/HttpFoundation/DbalSessionHandlerTest.php b/src/Symfony/Bridge/Doctrine/Tests/HttpFoundation/DbalSessionHandlerTest.php
index 4f82bc37bbb7..89ac999f2030 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/HttpFoundation/DbalSessionHandlerTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/HttpFoundation/DbalSessionHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bridge\Doctrine\Tests\HttpFoundation;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\HttpFoundation\DbalSessionHandler;
 
 /**
@@ -18,7 +19,7 @@
  *
  * @author Drak <drak@zikula.org>
  */
-class DbalSessionHandlerTest extends \PHPUnit_Framework_TestCase
+class DbalSessionHandlerTest extends TestCase
 {
     public function testConstruct()
     {
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php b/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
index 42f56b0ca83c..5a627dc23155 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bridge\Doctrine\Tests\Logger;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\Logger\DbalLogger;
 
-class DbalLoggerTest extends \PHPUnit_Framework_TestCase
+class DbalLoggerTest extends TestCase
 {
     /**
      * @dataProvider getLogFixtures
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php b/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php
index cdc553b2f05b..ef920a1fe097 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bridge\Doctrine\Tests\Security\User;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\Test\DoctrineTestHelper;
 use Symfony\Bridge\Doctrine\Tests\Fixtures\User;
 use Symfony\Bridge\Doctrine\Security\User\EntityUserProvider;
 use Doctrine\ORM\Tools\SchemaTool;
 
-class EntityUserProviderTest extends \PHPUnit_Framework_TestCase
+class EntityUserProviderTest extends TestCase
 {
     public function testRefreshUserGetsUserByPrimaryKey()
     {
diff --git a/src/Symfony/Bridge/Monolog/Tests/Handler/ConsoleHandlerTest.php b/src/Symfony/Bridge/Monolog/Tests/Handler/ConsoleHandlerTest.php
index b8efa6fcf959..28dd736f9ec3 100644
--- a/src/Symfony/Bridge/Monolog/Tests/Handler/ConsoleHandlerTest.php
+++ b/src/Symfony/Bridge/Monolog/Tests/Handler/ConsoleHandlerTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Bridge\Monolog\Tests\Handler;
 
 use Monolog\Logger;
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Monolog\Handler\ConsoleHandler;
 use Symfony\Component\Console\ConsoleEvents;
 use Symfony\Component\Console\Event\ConsoleCommandEvent;
@@ -26,7 +27,7 @@
  *
  * @author Tobias Schultze <http://tobion.de>
  */
-class ConsoleHandlerTest extends \PHPUnit_Framework_TestCase
+class ConsoleHandlerTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/NotFoundActivationStrategyTest.php b/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/NotFoundActivationStrategyTest.php
index 48bddc99a5ee..3c34f065eb03 100644
--- a/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/NotFoundActivationStrategyTest.php
+++ b/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/NotFoundActivationStrategyTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Bridge\Monolog\Tests\Handler\FingersCrossed;
 
+use Monolog\Logger;
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Monolog\Handler\FingersCrossed\NotFoundActivationStrategy;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Component\HttpKernel\Exception\HttpException;
-use Monolog\Logger;
 
-class NotFoundActivationStrategyTest extends \PHPUnit_Framework_TestCase
+class NotFoundActivationStrategyTest extends TestCase
 {
     /**
      * @dataProvider isActivatedProvider
diff --git a/src/Symfony/Bridge/Monolog/Tests/LoggerTest.php b/src/Symfony/Bridge/Monolog/Tests/LoggerTest.php
index 3d3c74cb73df..fbf5579e340c 100644
--- a/src/Symfony/Bridge/Monolog/Tests/LoggerTest.php
+++ b/src/Symfony/Bridge/Monolog/Tests/LoggerTest.php
@@ -3,10 +3,11 @@
 namespace Symfony\Bridge\Monolog\Tests;
 
 use Monolog\Handler\TestHandler;
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Monolog\Handler\DebugHandler;
 use Symfony\Bridge\Monolog\Logger;
 
-class LoggerTest extends \PHPUnit_Framework_TestCase
+class LoggerTest extends TestCase
 {
     /**
      * @group legacy
diff --git a/src/Symfony/Bridge/Monolog/Tests/Processor/WebProcessorTest.php b/src/Symfony/Bridge/Monolog/Tests/Processor/WebProcessorTest.php
index 143f63b5371b..51bddd1d9828 100644
--- a/src/Symfony/Bridge/Monolog/Tests/Processor/WebProcessorTest.php
+++ b/src/Symfony/Bridge/Monolog/Tests/Processor/WebProcessorTest.php
@@ -12,10 +12,11 @@
 namespace Symfony\Bridge\Monolog\Tests\Processor;
 
 use Monolog\Logger;
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Monolog\Processor\WebProcessor;
 use Symfony\Component\HttpFoundation\Request;
 
-class WebProcessorTest extends \PHPUnit_Framework_TestCase
+class WebProcessorTest extends TestCase
 {
     public function testUsesRequestServerData()
     {
diff --git a/src/Symfony/Bridge/PhpUnit/composer.json b/src/Symfony/Bridge/PhpUnit/composer.json
index 39eb9ef2180f..8f818d02db26 100644
--- a/src/Symfony/Bridge/PhpUnit/composer.json
+++ b/src/Symfony/Bridge/PhpUnit/composer.json
@@ -23,6 +23,9 @@
     "suggest": {
         "symfony/debug": "For tracking deprecated interfaces usages at runtime with DebugClassLoader"
     },
+    "conflict": {
+        "phpunit/phpunit": ">=6.0"
+    },
     "autoload": {
         "files": [ "bootstrap.php" ],
         "psr-4": { "Symfony\\Bridge\\PhpUnit\\": "" },
diff --git a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/ContainerBuilderTest.php b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/ContainerBuilderTest.php
index 3f3c577b846d..b634a69488a3 100644
--- a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/ContainerBuilderTest.php
+++ b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/ContainerBuilderTest.php
@@ -13,6 +13,7 @@
 
 require_once __DIR__.'/Fixtures/includes/foo.php';
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\ProxyManager\LazyProxy\Instantiator\RuntimeInstantiator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
@@ -22,7 +23,7 @@
  *
  * @author Marco Pivetta <ocramius@gmail.com>
  */
-class ContainerBuilderTest extends \PHPUnit_Framework_TestCase
+class ContainerBuilderTest extends TestCase
 {
     public function testCreateProxyServiceWithRuntimeInstantiator()
     {
diff --git a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Dumper/PhpDumperTest.php b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Dumper/PhpDumperTest.php
index 5e451c122f3c..d6f3d0d2e839 100644
--- a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Dumper/PhpDumperTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bridge\ProxyManager\Tests\LazyProxy\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\ProxyManager\LazyProxy\PhpDumper\ProxyDumper;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Dumper\PhpDumper;
@@ -21,7 +22,7 @@
  *
  * @author Marco Pivetta <ocramius@gmail.com>
  */
-class PhpDumperTest extends \PHPUnit_Framework_TestCase
+class PhpDumperTest extends TestCase
 {
     public function testDumpContainerWithProxyService()
     {
diff --git a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Instantiator/RuntimeInstantiatorTest.php b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Instantiator/RuntimeInstantiatorTest.php
index 12bef7b72dc0..e58b7d635616 100644
--- a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Instantiator/RuntimeInstantiatorTest.php
+++ b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Instantiator/RuntimeInstantiatorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bridge\ProxyManager\Tests\LazyProxy\Instantiator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\ProxyManager\LazyProxy\Instantiator\RuntimeInstantiator;
 use Symfony\Component\DependencyInjection\Definition;
 
@@ -19,7 +20,7 @@
  *
  * @author Marco Pivetta <ocramius@gmail.com>
  */
-class RuntimeInstantiatorTest extends \PHPUnit_Framework_TestCase
+class RuntimeInstantiatorTest extends TestCase
 {
     /**
      * @var RuntimeInstantiator
diff --git a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php
index 6d86bd24d2d1..838c33a8368b 100644
--- a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php
+++ b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bridge\ProxyManager\Tests\LazyProxy\PhpDumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\ProxyManager\LazyProxy\PhpDumper\ProxyDumper;
 use Symfony\Component\DependencyInjection\Definition;
 
@@ -19,7 +20,7 @@
  *
  * @author Marco Pivetta <ocramius@gmail.com>
  */
-class ProxyDumperTest extends \PHPUnit_Framework_TestCase
+class ProxyDumperTest extends TestCase
 {
     /**
      * @var ProxyDumper
diff --git a/src/Symfony/Bridge/Twig/Tests/AppVariableTest.php b/src/Symfony/Bridge/Twig/Tests/AppVariableTest.php
index 92ed4600bae1..9abb0e3b6ea7 100644
--- a/src/Symfony/Bridge/Twig/Tests/AppVariableTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/AppVariableTest.php
@@ -2,11 +2,12 @@
 
 namespace Symfony\Bridge\Twig\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\AppVariable;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Session\Session;
 
-class AppVariableTest extends \PHPUnit_Framework_TestCase
+class AppVariableTest extends TestCase
 {
     /**
      * @var AppVariable
diff --git a/src/Symfony/Bridge/Twig/Tests/Command/LintCommandTest.php b/src/Symfony/Bridge/Twig/Tests/Command/LintCommandTest.php
index 56c03574b6ee..9a5c33a528a3 100644
--- a/src/Symfony/Bridge/Twig/Tests/Command/LintCommandTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Command/LintCommandTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bridge\Twig\Tests\Command;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Command\LintCommand;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Tester\CommandTester;
 
-class LintCommandTest extends \PHPUnit_Framework_TestCase
+class LintCommandTest extends TestCase
 {
     private $files;
 
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php
index 474d8c33956b..ba04fd4b7cf8 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bridge\Twig\Tests\Extension;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Extension\AssetExtension;
 use Symfony\Component\Asset\Package;
 use Symfony\Component\Asset\Packages;
@@ -18,7 +19,7 @@
 use Symfony\Component\Asset\VersionStrategy\EmptyVersionStrategy;
 use Symfony\Component\Asset\VersionStrategy\StaticVersionStrategy;
 
-class AssetExtensionTest extends \PHPUnit_Framework_TestCase
+class AssetExtensionTest extends TestCase
 {
     /**
      * @group legacy
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/CodeExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/CodeExtensionTest.php
index 5e4a9a307982..64bebd709692 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/CodeExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/CodeExtensionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bridge\Twig\Tests\Extension;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Extension\CodeExtension;
 
-class CodeExtensionTest extends \PHPUnit_Framework_TestCase
+class CodeExtensionTest extends TestCase
 {
     protected $helper;
 
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php
index 604b0caaecc8..312fda1d7106 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Bridge\Twig\Tests\Extension;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Extension\DumpExtension;
 use Symfony\Component\VarDumper\VarDumper;
 use Symfony\Component\VarDumper\Cloner\VarCloner;
 
-class DumpExtensionTest extends \PHPUnit_Framework_TestCase
+class DumpExtensionTest extends TestCase
 {
     /**
      * @dataProvider getDumpTags
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/ExpressionExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/ExpressionExtensionTest.php
index 6d457e395b07..597dfc75f416 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/ExpressionExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/ExpressionExtensionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bridge\Twig\Tests\Extension;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Extension\ExpressionExtension;
 
-class ExpressionExtensionTest extends \PHPUnit_Framework_TestCase
+class ExpressionExtensionTest extends TestCase
 {
     protected $helper;
 
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/HttpFoundationExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/HttpFoundationExtensionTest.php
index 339d43d7c6bd..8f0c66ad78bb 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/HttpFoundationExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/HttpFoundationExtensionTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bridge\Twig\Tests\Extension;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Extension\HttpFoundationExtension;
 use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\RequestContext;
 
-class HttpFoundationExtensionTest extends \PHPUnit_Framework_TestCase
+class HttpFoundationExtensionTest extends TestCase
 {
     /**
      * @dataProvider getGenerateAbsoluteUrlData()
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/HttpKernelExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/HttpKernelExtensionTest.php
index 979dae3b0d80..685b250559cd 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/HttpKernelExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/HttpKernelExtensionTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bridge\Twig\Tests\Extension;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Extension\HttpKernelExtension;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Fragment\FragmentHandler;
 
-class HttpKernelExtensionTest extends \PHPUnit_Framework_TestCase
+class HttpKernelExtensionTest extends TestCase
 {
     /**
      * @expectedException \Twig_Error_Runtime
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/RoutingExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/RoutingExtensionTest.php
index 9f06b50ba051..5fa4e9cd36b1 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/RoutingExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/RoutingExtensionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bridge\Twig\Tests\Extension;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Extension\RoutingExtension;
 
-class RoutingExtensionTest extends \PHPUnit_Framework_TestCase
+class RoutingExtensionTest extends TestCase
 {
     /**
      * @dataProvider getEscapingTemplates
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php
index 2ea111b0baac..86a4fcbe3226 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bridge\Twig\Tests\Extension;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Extension\StopwatchExtension;
 
-class StopwatchExtensionTest extends \PHPUnit_Framework_TestCase
+class StopwatchExtensionTest extends TestCase
 {
     /**
      * @expectedException \Twig_Error_Syntax
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php
index e96bd4f9a3be..446697d3dd8b 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bridge\Twig\Tests\Extension;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Extension\TranslationExtension;
 use Symfony\Component\Translation\Translator;
 use Symfony\Component\Translation\MessageSelector;
 use Symfony\Component\Translation\Loader\ArrayLoader;
 
-class TranslationExtensionTest extends \PHPUnit_Framework_TestCase
+class TranslationExtensionTest extends TestCase
 {
     public function testEscaping()
     {
diff --git a/src/Symfony/Bridge/Twig/Tests/Node/DumpNodeTest.php b/src/Symfony/Bridge/Twig/Tests/Node/DumpNodeTest.php
index 8d3ede471c50..93c8433c2894 100644
--- a/src/Symfony/Bridge/Twig/Tests/Node/DumpNodeTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Node/DumpNodeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bridge\Twig\Tests\Node;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Node\DumpNode;
 
-class DumpNodeTest extends \PHPUnit_Framework_TestCase
+class DumpNodeTest extends TestCase
 {
     public function testNoVar()
     {
diff --git a/src/Symfony/Bridge/Twig/Tests/Node/FormThemeTest.php b/src/Symfony/Bridge/Twig/Tests/Node/FormThemeTest.php
index 02732f1932e8..420235559474 100644
--- a/src/Symfony/Bridge/Twig/Tests/Node/FormThemeTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Node/FormThemeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bridge\Twig\Tests\Node;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Node\FormThemeNode;
 
-class FormThemeTest extends \PHPUnit_Framework_TestCase
+class FormThemeTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Bridge/Twig/Tests/Node/SearchAndRenderBlockNodeTest.php b/src/Symfony/Bridge/Twig/Tests/Node/SearchAndRenderBlockNodeTest.php
index 408b7cfd145d..69b987e83297 100644
--- a/src/Symfony/Bridge/Twig/Tests/Node/SearchAndRenderBlockNodeTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Node/SearchAndRenderBlockNodeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bridge\Twig\Tests\Node;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode;
 
-class SearchAndRenderBlockNodeTest extends \PHPUnit_Framework_TestCase
+class SearchAndRenderBlockNodeTest extends TestCase
 {
     public function testCompileWidget()
     {
diff --git a/src/Symfony/Bridge/Twig/Tests/Node/TransNodeTest.php b/src/Symfony/Bridge/Twig/Tests/Node/TransNodeTest.php
index b1980b8a3772..683d47af27ae 100644
--- a/src/Symfony/Bridge/Twig/Tests/Node/TransNodeTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Node/TransNodeTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bridge\Twig\Tests\Node;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Node\TransNode;
 
 /**
  * @author Asmir Mustafic <goetas@gmail.com>
  */
-class TransNodeTest extends \PHPUnit_Framework_TestCase
+class TransNodeTest extends TestCase
 {
     public function testCompileStrict()
     {
diff --git a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/ScopeTest.php b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/ScopeTest.php
index aa9d204e5606..fad0e1f82976 100644
--- a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/ScopeTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/ScopeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bridge\Twig\Tests\NodeVisitor;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\NodeVisitor\Scope;
 
-class ScopeTest extends \PHPUnit_Framework_TestCase
+class ScopeTest extends TestCase
 {
     public function testScopeInitiation()
     {
diff --git a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationDefaultDomainNodeVisitorTest.php b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationDefaultDomainNodeVisitorTest.php
index 86dc25266c72..da9f43a6c4e0 100644
--- a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationDefaultDomainNodeVisitorTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationDefaultDomainNodeVisitorTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bridge\Twig\Tests\NodeVisitor;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\NodeVisitor\TranslationDefaultDomainNodeVisitor;
 use Symfony\Bridge\Twig\NodeVisitor\TranslationNodeVisitor;
 
-class TranslationDefaultDomainNodeVisitorTest extends \PHPUnit_Framework_TestCase
+class TranslationDefaultDomainNodeVisitorTest extends TestCase
 {
     private static $message = 'message';
     private static $domain = 'domain';
diff --git a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationNodeVisitorTest.php b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationNodeVisitorTest.php
index 571b5bba3174..d12fff532aaa 100644
--- a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationNodeVisitorTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationNodeVisitorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bridge\Twig\Tests\NodeVisitor;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\NodeVisitor\TranslationNodeVisitor;
 
-class TranslationNodeVisitorTest extends \PHPUnit_Framework_TestCase
+class TranslationNodeVisitorTest extends TestCase
 {
     /** @dataProvider getMessagesExtractionTestData */
     public function testMessagesExtraction(\Twig_Node $node, array $expectedMessages)
diff --git a/src/Symfony/Bridge/Twig/Tests/TokenParser/FormThemeTokenParserTest.php b/src/Symfony/Bridge/Twig/Tests/TokenParser/FormThemeTokenParserTest.php
index 6dea9fd69370..8931be061f9d 100644
--- a/src/Symfony/Bridge/Twig/Tests/TokenParser/FormThemeTokenParserTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/TokenParser/FormThemeTokenParserTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bridge\Twig\Tests\TokenParser;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\TokenParser\FormThemeTokenParser;
 use Symfony\Bridge\Twig\Node\FormThemeNode;
 
-class FormThemeTokenParserTest extends \PHPUnit_Framework_TestCase
+class FormThemeTokenParserTest extends TestCase
 {
     /**
      * @dataProvider getTestsForFormTheme
diff --git a/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php b/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php
index 4362e9131acb..0b1fb28b0e10 100644
--- a/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Bridge\Twig\Tests\Translation;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\Extension\TranslationExtension;
 use Symfony\Bridge\Twig\Translation\TwigExtractor;
 use Symfony\Component\Translation\MessageCatalogue;
 
-class TwigExtractorTest extends \PHPUnit_Framework_TestCase
+class TwigExtractorTest extends TestCase
 {
     /**
      * @dataProvider getExtractData
diff --git a/src/Symfony/Bridge/Twig/Tests/TwigEngineTest.php b/src/Symfony/Bridge/Twig/Tests/TwigEngineTest.php
index b3eebb55c987..e2082df3dd75 100644
--- a/src/Symfony/Bridge/Twig/Tests/TwigEngineTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/TwigEngineTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bridge\Twig\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Twig\TwigEngine;
 use Symfony\Component\Templating\TemplateReference;
 
-class TwigEngineTest extends \PHPUnit_Framework_TestCase
+class TwigEngineTest extends TestCase
 {
     public function testExistsWithTemplateInstances()
     {
diff --git a/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/Compiler/DumpDataCollectorPassTest.php b/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/Compiler/DumpDataCollectorPassTest.php
index 6500a85a8430..6e3e128534eb 100644
--- a/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/Compiler/DumpDataCollectorPassTest.php
+++ b/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/Compiler/DumpDataCollectorPassTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Bundle\DebugBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\DebugBundle\DependencyInjection\Compiler\DumpDataCollectorPass;
 use Symfony\Bundle\WebProfilerBundle\EventListener\WebDebugToolbarListener;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\HttpFoundation\RequestStack;
 
-class DumpDataCollectorPassTest extends \PHPUnit_Framework_TestCase
+class DumpDataCollectorPassTest extends TestCase
 {
     public function testProcessWithFileLinkFormatParameter()
     {
diff --git a/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/DebugExtensionTest.php b/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/DebugExtensionTest.php
index 3efb196cc9a3..3dbe29e9bd8c 100644
--- a/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/DebugExtensionTest.php
+++ b/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/DebugExtensionTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Bundle\DebugBundle\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\DebugBundle\DependencyInjection\DebugExtension;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
 
-class DebugExtensionTest extends \PHPUnit_Framework_TestCase
+class DebugExtensionTest extends TestCase
 {
     public function testLoadWithoutConfiguration()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php b/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
index f179b25dbd2b..351a8cc80a15 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Test;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Finder;
 use Symfony\Component\HttpKernel\KernelInterface;
 
@@ -19,7 +20,7 @@
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
-abstract class KernelTestCase extends \PHPUnit_Framework_TestCase
+abstract class KernelTestCase extends TestCase
 {
     protected static $class;
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterDebugCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterDebugCommandTest.php
index aac62095b1a1..9060af4d8260 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterDebugCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterDebugCommandTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Command;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Tester\CommandTester;
 use Symfony\Bundle\FrameworkBundle\Command\RouterDebugCommand;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 
-class RouterDebugCommandTest extends \PHPUnit_Framework_TestCase
+class RouterDebugCommandTest extends TestCase
 {
     public function testDebugAllRoutes()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterMatchCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterMatchCommandTest.php
index cb7f698bc664..6e9b5debe2f5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterMatchCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterMatchCommandTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Command;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Tester\CommandTester;
 use Symfony\Bundle\FrameworkBundle\Command\RouterMatchCommand;
@@ -19,7 +20,7 @@
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Routing\RequestContext;
 
-class RouterMatchCommandTest extends \PHPUnit_Framework_TestCase
+class RouterMatchCommandTest extends TestCase
 {
     public function testWithMatchPath()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationDebugCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationDebugCommandTest.php
index 60f81565d36d..19c6d70156b1 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationDebugCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationDebugCommandTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Command;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Tester\CommandTester;
 use Symfony\Bundle\FrameworkBundle\Command\TranslationDebugCommand;
 use Symfony\Component\Filesystem\Filesystem;
 
-class TranslationDebugCommandTest extends \PHPUnit_Framework_TestCase
+class TranslationDebugCommandTest extends TestCase
 {
     private $fs;
     private $translationDir;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationUpdateCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationUpdateCommandTest.php
index 8690263374e7..bf48bde14235 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationUpdateCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationUpdateCommandTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Command;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Tester\CommandTester;
 use Symfony\Bundle\FrameworkBundle\Command\TranslationUpdateCommand;
@@ -18,7 +19,7 @@
 use Symfony\Component\DependencyInjection;
 use Symfony\Component\HttpKernel;
 
-class TranslationUpdateCommandTest extends \PHPUnit_Framework_TestCase
+class TranslationUpdateCommandTest extends TestCase
 {
     private $fs;
     private $translationDir;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/AbstractDescriptorTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/AbstractDescriptorTest.php
index 46249c8e7c15..7f2723a0525a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/AbstractDescriptorTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/AbstractDescriptorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Console\Descriptor;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Output\BufferedOutput;
 use Symfony\Component\DependencyInjection\Alias;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -20,7 +21,7 @@
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 
-abstract class AbstractDescriptorTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractDescriptorTest extends TestCase
 {
     /** @dataProvider getDescribeRouteCollectionTestData */
     public function testDescribeRouteCollection(RouteCollection $routes, $expectedDescription)
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddCacheWarmerPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddCacheWarmerPassTest.php
index 7ee9aa558e5f..330deae6463d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddCacheWarmerPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddCacheWarmerPassTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\AddCacheWarmerPass;
 
-class AddCacheWarmerPassTest extends \PHPUnit_Framework_TestCase
+class AddCacheWarmerPassTest extends TestCase
 {
     public function testThatCacheWarmersAreProcessedInPriorityOrder()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddConsoleCommandPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddConsoleCommandPassTest.php
index 97427034f5a8..7bbc3c269a36 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddConsoleCommandPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddConsoleCommandPassTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\AddConsoleCommandPass;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\HttpKernel\Bundle\Bundle;
 
-class AddConsoleCommandPassTest extends \PHPUnit_Framework_TestCase
+class AddConsoleCommandPassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddConstraintValidatorsPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddConstraintValidatorsPassTest.php
index 88901dda70bd..abfaa1d07404 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddConstraintValidatorsPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddConstraintValidatorsPassTest.php
@@ -9,9 +9,10 @@
  * file that was distributed with this source code.
  */
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\AddConstraintValidatorsPass;
 
-class AddConstraintValidatorsPassTest extends \PHPUnit_Framework_TestCase
+class AddConstraintValidatorsPassTest extends TestCase
 {
     public function testThatConstraintValidatorServicesAreProcessed()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddExpressionLanguageProvidersPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddExpressionLanguageProvidersPassTest.php
index 9bc4acb9c156..0934fe31c0c4 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddExpressionLanguageProvidersPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/AddExpressionLanguageProvidersPassTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\AddExpressionLanguageProvidersPass;
 
-class AddExpressionLanguageProvidersPassTest extends \PHPUnit_Framework_TestCase
+class AddExpressionLanguageProvidersPassTest extends TestCase
 {
     public function testProcessForRouter()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LegacyFragmentRendererPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LegacyFragmentRendererPassTest.php
index e5c6adba8c97..d4f75ee95c20 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LegacyFragmentRendererPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LegacyFragmentRendererPassTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\FragmentRendererPass;
@@ -18,7 +19,7 @@
 /**
  * @group legacy
  */
-class LegacyFragmentRendererPassTest extends \PHPUnit_Framework_TestCase
+class LegacyFragmentRendererPassTest extends TestCase
 {
     /**
      * Tests that content rendering not implementing FragmentRendererInterface
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LegacyTemplatingAssetHelperPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LegacyTemplatingAssetHelperPassTest.php
index 5cc5c9c558bc..3bddd5e021b7 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LegacyTemplatingAssetHelperPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LegacyTemplatingAssetHelperPassTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\TemplatingAssetHelperPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
@@ -19,7 +20,7 @@
 /**
  * @group legacy
  */
-class LegacyTemplatingAssetHelperPassTest extends \PHPUnit_Framework_TestCase
+class LegacyTemplatingAssetHelperPassTest extends TestCase
 {
     public function getScopesTests()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LoggingTranslatorPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LoggingTranslatorPassTest.php
index b71fe0a80766..db6557913b06 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LoggingTranslatorPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LoggingTranslatorPassTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\LoggingTranslatorPass;
 
-class LoggingTranslatorPassTest extends \PHPUnit_Framework_TestCase
+class LoggingTranslatorPassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ProfilerPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ProfilerPassTest.php
index 9edb44ebb6e1..3637330ed502 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ProfilerPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ProfilerPassTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\ProfilerPass;
 
-class ProfilerPassTest extends \PHPUnit_Framework_TestCase
+class ProfilerPassTest extends TestCase
 {
     private $profilerDefinition;
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/SerializerPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/SerializerPassTest.php
index 3e592916a0a2..f1e29fca5182 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/SerializerPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/SerializerPassTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\SerializerPass;
 
@@ -19,7 +20,7 @@
  *
  * @author Javier Lopez <f12loalf@gmail.com>
  */
-class SerializerPassTest extends \PHPUnit_Framework_TestCase
+class SerializerPassTest extends TestCase
 {
     public function testThrowExceptionWhenNoNormalizers()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/TranslatorPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/TranslatorPassTest.php
index dcdb0bc5bd37..10a38aabdb40 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/TranslatorPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/TranslatorPassTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\TranslatorPass;
 
-class TranslatorPassTest extends \PHPUnit_Framework_TestCase
+class TranslatorPassTest extends TestCase
 {
     public function testValidCollector()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
index 16980c76faea..a20a120d0710 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Configuration;
 use Symfony\Component\Config\Definition\Processor;
 
-class ConfigurationTest extends \PHPUnit_Framework_TestCase
+class ConfigurationTest extends TestCase
 {
     public function testDefaultConfig()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RedirectableUrlMatcherTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RedirectableUrlMatcherTest.php
index 057aa6c8091a..fb5395ea6d26 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RedirectableUrlMatcherTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RedirectableUrlMatcherTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Routing;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Bundle\FrameworkBundle\Routing\RedirectableUrlMatcher;
 use Symfony\Component\Routing\RequestContext;
 
-class RedirectableUrlMatcherTest extends \PHPUnit_Framework_TestCase
+class RedirectableUrlMatcherTest extends TestCase
 {
     public function testRedirectWhenNoSlash()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
index d90f5d8358f9..c9a3b282ce9e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Routing;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\Routing\Router;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 
-class RouterTest extends \PHPUnit_Framework_TestCase
+class RouterTest extends TestCase
 {
     public function testGenerateWithServiceParam()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/DelegatingEngineTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/DelegatingEngineTest.php
index d18427dc4e80..e3ff92b874c0 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/DelegatingEngineTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/DelegatingEngineTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Templating;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\Templating\DelegatingEngine;
 use Symfony\Component\HttpFoundation\Response;
 
-class DelegatingEngineTest extends \PHPUnit_Framework_TestCase
+class DelegatingEngineTest extends TestCase
 {
     public function testSupportsRetrievesEngineFromTheContainer()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/AssetsHelperTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/AssetsHelperTest.php
index 9460799684bd..cd0676169fb9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/AssetsHelperTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/AssetsHelperTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Templating\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\Templating\Helper\AssetsHelper;
 use Symfony\Component\Asset\Package;
 use Symfony\Component\Asset\Packages;
 use Symfony\Component\Asset\PathPackage;
 use Symfony\Component\Asset\VersionStrategy\StaticVersionStrategy;
 
-class AssetsHelperTest extends \PHPUnit_Framework_TestCase
+class AssetsHelperTest extends TestCase
 {
     /**
      * @group legacy
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/RequestHelperTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/RequestHelperTest.php
index d626e63e41cf..4ece72e47e12 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/RequestHelperTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/RequestHelperTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Templating\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Bundle\FrameworkBundle\Templating\Helper\RequestHelper;
 
-class RequestHelperTest extends \PHPUnit_Framework_TestCase
+class RequestHelperTest extends TestCase
 {
     protected $requestStack;
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/SessionHelperTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/SessionHelperTest.php
index 5517afdb732f..f664a49b12ee 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/SessionHelperTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/SessionHelperTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Templating\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Component\HttpFoundation\Session\Session;
 use Symfony\Component\HttpFoundation\Session\Storage\MockArraySessionStorage;
 use Symfony\Bundle\FrameworkBundle\Templating\Helper\SessionHelper;
 
-class SessionHelperTest extends \PHPUnit_Framework_TestCase
+class SessionHelperTest extends TestCase
 {
     protected $requestStack;
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/StopwatchHelperTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/StopwatchHelperTest.php
index 3518267d81b6..cf7b627a499a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/StopwatchHelperTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/StopwatchHelperTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Templating\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\Templating\Helper\StopwatchHelper;
 
-class StopwatchHelperTest extends \PHPUnit_Framework_TestCase
+class StopwatchHelperTest extends TestCase
 {
     public function testDevEnvironment()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/TestCase.php b/src/Symfony/Bundle/FrameworkBundle/Tests/TestCase.php
index 8e724305a298..115ca1ae58a2 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/TestCase.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/TestCase.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests;
 
-class TestCase extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase as PHPUnitTestCase;
+
+class TestCase extends PHPUnitTestCase
 {
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Translation/TranslatorTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Translation/TranslatorTest.php
index 11fe9da001e6..9a7c44d850d9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Translation/TranslatorTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Translation/TranslatorTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Translation;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\Translation\Translator;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\Translation\MessageSelector;
 
-class TranslatorTest extends \PHPUnit_Framework_TestCase
+class TranslatorTest extends TestCase
 {
     protected $tmpDir;
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Validator/ConstraintValidatorFactoryTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Validator/ConstraintValidatorFactoryTest.php
index 12ee6ac673d9..6cf9574ece96 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Validator/ConstraintValidatorFactoryTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Validator/ConstraintValidatorFactoryTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Validator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\Validator\ConstraintValidatorFactory;
 use Symfony\Component\DependencyInjection\Container;
 use Symfony\Component\Validator\Constraints\Blank as BlankConstraint;
 
-class ConstraintValidatorFactoryTest extends \PHPUnit_Framework_TestCase
+class ConstraintValidatorFactoryTest extends TestCase
 {
     public function testGetInstanceCreatesValidator()
     {
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DataCollector/SecurityDataCollectorTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DataCollector/SecurityDataCollectorTest.php
index c7845959ac42..0357b612060c 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DataCollector/SecurityDataCollectorTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DataCollector/SecurityDataCollectorTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Bundle\SecurityBundle\Tests\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\SecurityBundle\DataCollector\SecurityDataCollector;
 use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage;
 use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
 use Symfony\Component\Security\Core\Role\Role;
 use Symfony\Component\Security\Core\Role\RoleHierarchy;
 
-class SecurityDataCollectorTest extends \PHPUnit_Framework_TestCase
+class SecurityDataCollectorTest extends TestCase
 {
     public function testCollectWhenSecurityIsDisabled()
     {
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php
index a07b3fc82910..ebb22fddac83 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Bundle\SecurityBundle\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Parameter;
 use Symfony\Bundle\SecurityBundle\SecurityBundle;
 use Symfony\Bundle\SecurityBundle\DependencyInjection\SecurityExtension;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-abstract class CompleteConfigurationTest extends \PHPUnit_Framework_TestCase
+abstract class CompleteConfigurationTest extends TestCase
 {
     private static $containerCache = array();
 
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/MainConfigurationTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/MainConfigurationTest.php
index 8d9224673cd7..5d2fe28e9e05 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/MainConfigurationTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/MainConfigurationTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bundle\SecurityBundle\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\SecurityBundle\DependencyInjection\MainConfiguration;
 use Symfony\Component\Config\Definition\Processor;
 
-class MainConfigurationTest extends \PHPUnit_Framework_TestCase
+class MainConfigurationTest extends TestCase
 {
     /**
      * The minimal, required config needed to not have any required validation
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/AbstractFactoryTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/AbstractFactoryTest.php
index 39daf998cb4e..846d76f770d5 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/AbstractFactoryTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/AbstractFactoryTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bundle\SecurityBundle\Tests\DependencyInjection\Security\Factory;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class AbstractFactoryTest extends \PHPUnit_Framework_TestCase
+class AbstractFactoryTest extends TestCase
 {
     public function testCreate()
     {
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php
index 4dd33020c572..8eb2f70ea5de 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bundle\SecurityBundle\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\SecurityBundle\DependencyInjection\SecurityExtension;
 use Symfony\Bundle\SecurityBundle\SecurityBundle;
 use Symfony\Bundle\SecurityBundle\Tests\DependencyInjection\Fixtures\UserProvider\DummyProvider;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class SecurityExtensionTest extends \PHPUnit_Framework_TestCase
+class SecurityExtensionTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/ExtensionPassTest.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/ExtensionPassTest.php
index 587801d8db62..b83c5645c510 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/ExtensionPassTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/ExtensionPassTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Bundle\TwigBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\TwigBundle\DependencyInjection\Compiler\ExtensionPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
 
-class ExtensionPassTest extends \PHPUnit_Framework_TestCase
+class ExtensionPassTest extends TestCase
 {
     public function testProcessDoesNotDropExistingFileLoaderMethodCalls()
     {
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigLoaderPassTest.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigLoaderPassTest.php
index e8d9476d8dc2..10bcf3e8f66a 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigLoaderPassTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigLoaderPassTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bundle\TwigBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Bundle\TwigBundle\DependencyInjection\Compiler\TwigLoaderPass;
 
-class TwigLoaderPassTest extends \PHPUnit_Framework_TestCase
+class TwigLoaderPassTest extends TestCase
 {
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/ConfigurationTest.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/ConfigurationTest.php
index 4dfb54eb7687..d3f8652c4b6d 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/ConfigurationTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/ConfigurationTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bundle\TwigBundle\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\TwigBundle\DependencyInjection\Configuration;
 use Symfony\Component\Config\Definition\Processor;
 
-class ConfigurationTest extends \PHPUnit_Framework_TestCase
+class ConfigurationTest extends TestCase
 {
     public function testDoNoDuplicateDefaultFormResources()
     {
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/Functional/CacheWarmingTest.php b/src/Symfony/Bundle/TwigBundle/Tests/Functional/CacheWarmingTest.php
index 5c4126cfe723..455ed0b6a8c0 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/Functional/CacheWarmingTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/Functional/CacheWarmingTest.php
@@ -17,7 +17,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\TwigBundle\TwigBundle;
 
-class CacheWarmingTest extends \PHPUnit_Framework_TestCase
+class CacheWarmingTest extends TestCase
 {
     public function testCacheIsProperlyWarmedWhenTemplatingIsAvailable()
     {
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/Functional/NoTemplatingEntryTest.php b/src/Symfony/Bundle/TwigBundle/Tests/Functional/NoTemplatingEntryTest.php
index 068a10526cb6..d07e0e946b2e 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/Functional/NoTemplatingEntryTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/Functional/NoTemplatingEntryTest.php
@@ -17,7 +17,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\TwigBundle\TwigBundle;
 
-class NoTemplatingEntryTest extends \PHPUnit_Framework_TestCase
+class NoTemplatingEntryTest extends TestCase
 {
     public function test()
     {
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/TestCase.php b/src/Symfony/Bundle/TwigBundle/Tests/TestCase.php
index 0c7af8ae4b85..800be3008a44 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/TestCase.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/TestCase.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Bundle\TwigBundle\Tests;
 
-class TestCase extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase as PHPUnitTestCase;
+
+class TestCase extends PHPUnitTestCase
 {
 }
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/Command/ExportCommandTest.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/Command/ExportCommandTest.php
index 70267ecc9ea0..f01f38f4d08e 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/Command/ExportCommandTest.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/Command/ExportCommandTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Bundle\WebProfilerBundle\Tests\Command;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\WebProfilerBundle\Command\ExportCommand;
 use Symfony\Component\Console\Tester\CommandTester;
 use Symfony\Component\HttpKernel\Profiler\Profile;
 
-class ExportCommandTest extends \PHPUnit_Framework_TestCase
+class ExportCommandTest extends TestCase
 {
     /**
      * @expectedException \LogicException
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/Command/ImportCommandTest.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/Command/ImportCommandTest.php
index fe3ba421ad64..8f63ab1db23b 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/Command/ImportCommandTest.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/Command/ImportCommandTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Bundle\WebProfilerBundle\Tests\Command;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\WebProfilerBundle\Command\ImportCommand;
 use Symfony\Component\Console\Tester\CommandTester;
 use Symfony\Component\HttpKernel\Profiler\Profile;
 
-class ImportCommandTest extends \PHPUnit_Framework_TestCase
+class ImportCommandTest extends TestCase
 {
     public function testExecute()
     {
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/Controller/ProfilerControllerTest.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/Controller/ProfilerControllerTest.php
index 0ae9fa80fc33..a14869d4ec20 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/Controller/ProfilerControllerTest.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/Controller/ProfilerControllerTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Bundle\WebProfilerBundle\Tests\Controller;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\WebProfilerBundle\Controller\ProfilerController;
 use Symfony\Component\HttpKernel\Profiler\Profile;
 use Symfony\Component\HttpFoundation\Request;
 
-class ProfilerControllerTest extends \PHPUnit_Framework_TestCase
+class ProfilerControllerTest extends TestCase
 {
     /**
      * @dataProvider getEmptyTokenCases
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/ConfigurationTest.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/ConfigurationTest.php
index 5203b9c0ea02..b11f6928b4e9 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/ConfigurationTest.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/ConfigurationTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bundle\WebProfilerBundle\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\WebProfilerBundle\DependencyInjection\Configuration;
 use Symfony\Component\Config\Definition\Processor;
 
-class ConfigurationTest extends \PHPUnit_Framework_TestCase
+class ConfigurationTest extends TestCase
 {
     /**
      * @dataProvider getDebugModes
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/EventListener/WebDebugToolbarListenerTest.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/EventListener/WebDebugToolbarListenerTest.php
index 3b27745ddc0f..89d6e932f118 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/EventListener/WebDebugToolbarListenerTest.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/EventListener/WebDebugToolbarListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bundle\WebProfilerBundle\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\WebProfilerBundle\EventListener\WebDebugToolbarListener;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -18,7 +19,7 @@
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 
-class WebDebugToolbarListenerTest extends \PHPUnit_Framework_TestCase
+class WebDebugToolbarListenerTest extends TestCase
 {
     /**
      * @dataProvider getInjectToolbarTests
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/TestCase.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/TestCase.php
index 0c0efeb0e041..581ad2e2ea02 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/TestCase.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/TestCase.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Bundle\WebProfilerBundle\Tests;
 
-class TestCase extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase as PHPUnitTestCase;
+
+class TestCase extends PHPUnitTestCase
 {
 }
diff --git a/src/Symfony/Component/Asset/Tests/Context/NullContextTest.php b/src/Symfony/Component/Asset/Tests/Context/NullContextTest.php
index 13e0e43d9221..4623412f5795 100644
--- a/src/Symfony/Component/Asset/Tests/Context/NullContextTest.php
+++ b/src/Symfony/Component/Asset/Tests/Context/NullContextTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Asset\Tests\Context;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Asset\Context\NullContext;
 
-class NullContextTest extends \PHPUnit_Framework_TestCase
+class NullContextTest extends TestCase
 {
     public function testGetBasePath()
     {
diff --git a/src/Symfony/Component/Asset/Tests/Context/RequestStackContextTest.php b/src/Symfony/Component/Asset/Tests/Context/RequestStackContextTest.php
index dea77a587efa..7269d0e6bc98 100644
--- a/src/Symfony/Component/Asset/Tests/Context/RequestStackContextTest.php
+++ b/src/Symfony/Component/Asset/Tests/Context/RequestStackContextTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Asset\Tests\Context;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Asset\Context\RequestStackContext;
 
-class RequestStackContextTest extends \PHPUnit_Framework_TestCase
+class RequestStackContextTest extends TestCase
 {
     public function testGetBasePathEmpty()
     {
diff --git a/src/Symfony/Component/Asset/Tests/PackageTest.php b/src/Symfony/Component/Asset/Tests/PackageTest.php
index a2310d5898de..9a1719660462 100644
--- a/src/Symfony/Component/Asset/Tests/PackageTest.php
+++ b/src/Symfony/Component/Asset/Tests/PackageTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Asset\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Asset\Package;
 use Symfony\Component\Asset\VersionStrategy\StaticVersionStrategy;
 use Symfony\Component\Asset\VersionStrategy\EmptyVersionStrategy;
 
-class PackageTest extends \PHPUnit_Framework_TestCase
+class PackageTest extends TestCase
 {
     /**
      * @dataProvider getConfigs
diff --git a/src/Symfony/Component/Asset/Tests/PackagesTest.php b/src/Symfony/Component/Asset/Tests/PackagesTest.php
index bb515f20964f..4b0872f7f269 100644
--- a/src/Symfony/Component/Asset/Tests/PackagesTest.php
+++ b/src/Symfony/Component/Asset/Tests/PackagesTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Asset\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Asset\Package;
 use Symfony\Component\Asset\Packages;
 use Symfony\Component\Asset\VersionStrategy\StaticVersionStrategy;
 
-class PackagesTest extends \PHPUnit_Framework_TestCase
+class PackagesTest extends TestCase
 {
     public function testGetterSetters()
     {
diff --git a/src/Symfony/Component/Asset/Tests/PathPackageTest.php b/src/Symfony/Component/Asset/Tests/PathPackageTest.php
index 1f0883abad82..6a7c2cc6e45d 100644
--- a/src/Symfony/Component/Asset/Tests/PathPackageTest.php
+++ b/src/Symfony/Component/Asset/Tests/PathPackageTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Asset\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Asset\PathPackage;
 use Symfony\Component\Asset\VersionStrategy\StaticVersionStrategy;
 
-class PathPackageTest extends \PHPUnit_Framework_TestCase
+class PathPackageTest extends TestCase
 {
     /**
      * @dataProvider getConfigs
diff --git a/src/Symfony/Component/Asset/Tests/UrlPackageTest.php b/src/Symfony/Component/Asset/Tests/UrlPackageTest.php
index 588e9985741d..006683448435 100644
--- a/src/Symfony/Component/Asset/Tests/UrlPackageTest.php
+++ b/src/Symfony/Component/Asset/Tests/UrlPackageTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Asset\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Asset\UrlPackage;
 use Symfony\Component\Asset\VersionStrategy\StaticVersionStrategy;
 use Symfony\Component\Asset\VersionStrategy\EmptyVersionStrategy;
 
-class UrlPackageTest extends \PHPUnit_Framework_TestCase
+class UrlPackageTest extends TestCase
 {
     /**
      * @dataProvider getConfigs
diff --git a/src/Symfony/Component/Asset/Tests/VersionStrategy/EmptyVersionStrategyTest.php b/src/Symfony/Component/Asset/Tests/VersionStrategy/EmptyVersionStrategyTest.php
index fb842dd4f77a..430146fd5070 100644
--- a/src/Symfony/Component/Asset/Tests/VersionStrategy/EmptyVersionStrategyTest.php
+++ b/src/Symfony/Component/Asset/Tests/VersionStrategy/EmptyVersionStrategyTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Asset\Tests\VersionStrategy;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Asset\VersionStrategy\EmptyVersionStrategy;
 
-class EmptyVersionStrategyTest extends \PHPUnit_Framework_TestCase
+class EmptyVersionStrategyTest extends TestCase
 {
     public function testGetVersion()
     {
diff --git a/src/Symfony/Component/Asset/Tests/VersionStrategy/StaticVersionStrategyTest.php b/src/Symfony/Component/Asset/Tests/VersionStrategy/StaticVersionStrategyTest.php
index 77958ce2ca0c..7b5a3e8d5cec 100644
--- a/src/Symfony/Component/Asset/Tests/VersionStrategy/StaticVersionStrategyTest.php
+++ b/src/Symfony/Component/Asset/Tests/VersionStrategy/StaticVersionStrategyTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Asset\Tests\VersionStrategy;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Asset\VersionStrategy\StaticVersionStrategy;
 
-class StaticVersionStrategyTest extends \PHPUnit_Framework_TestCase
+class StaticVersionStrategyTest extends TestCase
 {
     public function testGetVersion()
     {
diff --git a/src/Symfony/Component/BrowserKit/Tests/ClientTest.php b/src/Symfony/Component/BrowserKit/Tests/ClientTest.php
index 7be90657ddf1..e715bb9a4c32 100644
--- a/src/Symfony/Component/BrowserKit/Tests/ClientTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/ClientTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\BrowserKit\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\BrowserKit\Client;
 use Symfony\Component\BrowserKit\History;
 use Symfony\Component\BrowserKit\CookieJar;
@@ -71,7 +72,7 @@ protected function getScript($request)
     }
 }
 
-class ClientTest extends \PHPUnit_Framework_TestCase
+class ClientTest extends TestCase
 {
     public function testGetHistory()
     {
diff --git a/src/Symfony/Component/BrowserKit/Tests/CookieJarTest.php b/src/Symfony/Component/BrowserKit/Tests/CookieJarTest.php
index 54a84b43a463..ae9f6a7ae5c9 100644
--- a/src/Symfony/Component/BrowserKit/Tests/CookieJarTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/CookieJarTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\BrowserKit\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\BrowserKit\CookieJar;
 use Symfony\Component\BrowserKit\Cookie;
 use Symfony\Component\BrowserKit\Response;
 
-class CookieJarTest extends \PHPUnit_Framework_TestCase
+class CookieJarTest extends TestCase
 {
     public function testSetGet()
     {
diff --git a/src/Symfony/Component/BrowserKit/Tests/CookieTest.php b/src/Symfony/Component/BrowserKit/Tests/CookieTest.php
index 4722de6d7b04..12ca705b57a4 100644
--- a/src/Symfony/Component/BrowserKit/Tests/CookieTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/CookieTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\BrowserKit\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\BrowserKit\Cookie;
 
-class CookieTest extends \PHPUnit_Framework_TestCase
+class CookieTest extends TestCase
 {
     /**
      * @dataProvider getTestsForToFromString
diff --git a/src/Symfony/Component/BrowserKit/Tests/HistoryTest.php b/src/Symfony/Component/BrowserKit/Tests/HistoryTest.php
index d6d830e83ef0..aa09b05b3426 100644
--- a/src/Symfony/Component/BrowserKit/Tests/HistoryTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/HistoryTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\BrowserKit\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\BrowserKit\History;
 use Symfony\Component\BrowserKit\Request;
 
-class HistoryTest extends \PHPUnit_Framework_TestCase
+class HistoryTest extends TestCase
 {
     public function testAdd()
     {
diff --git a/src/Symfony/Component/BrowserKit/Tests/RequestTest.php b/src/Symfony/Component/BrowserKit/Tests/RequestTest.php
index b75b5fb5c0ab..f163de967437 100644
--- a/src/Symfony/Component/BrowserKit/Tests/RequestTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/RequestTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\BrowserKit\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\BrowserKit\Request;
 
-class RequestTest extends \PHPUnit_Framework_TestCase
+class RequestTest extends TestCase
 {
     public function testGetUri()
     {
diff --git a/src/Symfony/Component/BrowserKit/Tests/ResponseTest.php b/src/Symfony/Component/BrowserKit/Tests/ResponseTest.php
index bfe3cd52c231..0ba4e3b3a71d 100644
--- a/src/Symfony/Component/BrowserKit/Tests/ResponseTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/ResponseTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\BrowserKit\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\BrowserKit\Response;
 
-class ResponseTest extends \PHPUnit_Framework_TestCase
+class ResponseTest extends TestCase
 {
     public function testGetUri()
     {
diff --git a/src/Symfony/Component/ClassLoader/Tests/ApcClassLoaderTest.php b/src/Symfony/Component/ClassLoader/Tests/ApcClassLoaderTest.php
index e96ba954087c..8ad7132ee9ea 100644
--- a/src/Symfony/Component/ClassLoader/Tests/ApcClassLoaderTest.php
+++ b/src/Symfony/Component/ClassLoader/Tests/ApcClassLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\ClassLoader\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ClassLoader\ApcClassLoader;
 use Symfony\Component\ClassLoader\ClassLoader;
 
-class ApcClassLoaderTest extends \PHPUnit_Framework_TestCase
+class ApcClassLoaderTest extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/ClassLoader/Tests/ClassCollectionLoaderTest.php b/src/Symfony/Component/ClassLoader/Tests/ClassCollectionLoaderTest.php
index 00be361f506f..4adff9fbfeda 100644
--- a/src/Symfony/Component/ClassLoader/Tests/ClassCollectionLoaderTest.php
+++ b/src/Symfony/Component/ClassLoader/Tests/ClassCollectionLoaderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\ClassLoader\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ClassLoader\ClassCollectionLoader;
 
 require_once __DIR__.'/Fixtures/ClassesWithParents/GInterface.php';
@@ -18,7 +19,7 @@
 require_once __DIR__.'/Fixtures/ClassesWithParents/B.php';
 require_once __DIR__.'/Fixtures/ClassesWithParents/A.php';
 
-class ClassCollectionLoaderTest extends \PHPUnit_Framework_TestCase
+class ClassCollectionLoaderTest extends TestCase
 {
     /**
      * @requires PHP 5.4
diff --git a/src/Symfony/Component/ClassLoader/Tests/ClassLoaderTest.php b/src/Symfony/Component/ClassLoader/Tests/ClassLoaderTest.php
index 09eea04229c0..4d8520cd0e9d 100644
--- a/src/Symfony/Component/ClassLoader/Tests/ClassLoaderTest.php
+++ b/src/Symfony/Component/ClassLoader/Tests/ClassLoaderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\ClassLoader\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ClassLoader\ClassLoader;
 
-class ClassLoaderTest extends \PHPUnit_Framework_TestCase
+class ClassLoaderTest extends TestCase
 {
     public function testGetPrefixes()
     {
diff --git a/src/Symfony/Component/ClassLoader/Tests/ClassMapGeneratorTest.php b/src/Symfony/Component/ClassLoader/Tests/ClassMapGeneratorTest.php
index 7016767fe7ba..db7fb962cedd 100644
--- a/src/Symfony/Component/ClassLoader/Tests/ClassMapGeneratorTest.php
+++ b/src/Symfony/Component/ClassLoader/Tests/ClassMapGeneratorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\ClassLoader\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ClassLoader\ClassMapGenerator;
 
-class ClassMapGeneratorTest extends \PHPUnit_Framework_TestCase
+class ClassMapGeneratorTest extends TestCase
 {
     /**
      * @var string|null
diff --git a/src/Symfony/Component/ClassLoader/Tests/LegacyApcUniversalClassLoaderTest.php b/src/Symfony/Component/ClassLoader/Tests/LegacyApcUniversalClassLoaderTest.php
index 512ff632a51d..6d4e57e98450 100644
--- a/src/Symfony/Component/ClassLoader/Tests/LegacyApcUniversalClassLoaderTest.php
+++ b/src/Symfony/Component/ClassLoader/Tests/LegacyApcUniversalClassLoaderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\ClassLoader\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ClassLoader\ApcUniversalClassLoader;
 
 /**
  * @group legacy
  */
-class LegacyApcUniversalClassLoaderTest extends \PHPUnit_Framework_TestCase
+class LegacyApcUniversalClassLoaderTest extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/ClassLoader/Tests/LegacyUniversalClassLoaderTest.php b/src/Symfony/Component/ClassLoader/Tests/LegacyUniversalClassLoaderTest.php
index 2588e9603443..f9a8b5518b58 100644
--- a/src/Symfony/Component/ClassLoader/Tests/LegacyUniversalClassLoaderTest.php
+++ b/src/Symfony/Component/ClassLoader/Tests/LegacyUniversalClassLoaderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\ClassLoader\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ClassLoader\UniversalClassLoader;
 
 /**
  * @group legacy
  */
-class LegacyUniversalClassLoaderTest extends \PHPUnit_Framework_TestCase
+class LegacyUniversalClassLoaderTest extends TestCase
 {
     /**
      * @dataProvider getLoadClassTests
diff --git a/src/Symfony/Component/ClassLoader/Tests/Psr4ClassLoaderTest.php b/src/Symfony/Component/ClassLoader/Tests/Psr4ClassLoaderTest.php
index 21a7afbd6e75..8c7ef7978616 100644
--- a/src/Symfony/Component/ClassLoader/Tests/Psr4ClassLoaderTest.php
+++ b/src/Symfony/Component/ClassLoader/Tests/Psr4ClassLoaderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\ClassLoader\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ClassLoader\Psr4ClassLoader;
 
-class Psr4ClassLoaderTest extends \PHPUnit_Framework_TestCase
+class Psr4ClassLoaderTest extends TestCase
 {
     /**
      * @param string $className
diff --git a/src/Symfony/Component/Config/Tests/ConfigCacheFactoryTest.php b/src/Symfony/Component/Config/Tests/ConfigCacheFactoryTest.php
index 291243deada7..c523e5cd5e6a 100644
--- a/src/Symfony/Component/Config/Tests/ConfigCacheFactoryTest.php
+++ b/src/Symfony/Component/Config/Tests/ConfigCacheFactoryTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\ConfigCacheFactory;
 
-class ConfigCacheFactoryTest extends \PHPUnit_Framework_TestCase
+class ConfigCacheFactoryTest extends TestCase
 {
     /**
      * @expectedException \InvalidArgumentException
diff --git a/src/Symfony/Component/Config/Tests/ConfigCacheTest.php b/src/Symfony/Component/Config/Tests/ConfigCacheTest.php
index ee30d0b394fd..e6bcd19a8aac 100644
--- a/src/Symfony/Component/Config/Tests/ConfigCacheTest.php
+++ b/src/Symfony/Component/Config/Tests/ConfigCacheTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Config\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\ConfigCache;
 use Symfony\Component\Config\Resource\FileResource;
 
-class ConfigCacheTest extends \PHPUnit_Framework_TestCase
+class ConfigCacheTest extends TestCase
 {
     private $resourceFile = null;
 
diff --git a/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php
index a7929ceb3512..8ec1763065fb 100644
--- a/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Config\Tests\Definition;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\ArrayNode;
 use Symfony\Component\Config\Definition\ScalarNode;
 
-class ArrayNodeTest extends \PHPUnit_Framework_TestCase
+class ArrayNodeTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidTypeException
diff --git a/src/Symfony/Component/Config/Tests/Definition/BooleanNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/BooleanNodeTest.php
index b0cb079e96fb..ab1d3164145d 100644
--- a/src/Symfony/Component/Config/Tests/Definition/BooleanNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/BooleanNodeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Definition;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\BooleanNode;
 
-class BooleanNodeTest extends \PHPUnit_Framework_TestCase
+class BooleanNodeTest extends TestCase
 {
     /**
      * @dataProvider getValidValues
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
index b07f6079ebd9..6456639af305 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Config\Tests\Definition\Builder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
 use Symfony\Component\Config\Definition\Processor;
 use Symfony\Component\Config\Definition\Builder\ScalarNodeDefinition;
 use Symfony\Component\Config\Definition\Exception\InvalidDefinitionException;
 
-class ArrayNodeDefinitionTest extends \PHPUnit_Framework_TestCase
+class ArrayNodeDefinitionTest extends TestCase
 {
     public function testAppendingSomeNode()
     {
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/EnumNodeDefinitionTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/EnumNodeDefinitionTest.php
index 69f7fcfb22e9..d8f9bf554780 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/EnumNodeDefinitionTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/EnumNodeDefinitionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Definition\Builder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\Builder\EnumNodeDefinition;
 
-class EnumNodeDefinitionTest extends \PHPUnit_Framework_TestCase
+class EnumNodeDefinitionTest extends TestCase
 {
     /**
      * @expectedException \InvalidArgumentException
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/ExprBuilderTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/ExprBuilderTest.php
index ebb766eed63d..1b90ebfeb82b 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/ExprBuilderTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/ExprBuilderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Definition\Builder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 
-class ExprBuilderTest extends \PHPUnit_Framework_TestCase
+class ExprBuilderTest extends TestCase
 {
     public function testAlwaysExpression()
     {
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/NodeBuilderTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/NodeBuilderTest.php
index 22c399ca9d88..88775656784f 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/NodeBuilderTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/NodeBuilderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Config\Tests\Definition\Builder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\Builder\NodeBuilder as BaseNodeBuilder;
 use Symfony\Component\Config\Definition\Builder\VariableNodeDefinition as BaseVariableNodeDefinition;
 
-class NodeBuilderTest extends \PHPUnit_Framework_TestCase
+class NodeBuilderTest extends TestCase
 {
     /**
      * @expectedException \RuntimeException
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/NumericNodeDefinitionTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/NumericNodeDefinitionTest.php
index cf0813ace002..efe0f19482cb 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/NumericNodeDefinitionTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/NumericNodeDefinitionTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Config\Tests\Definition\Builder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\Builder\IntegerNodeDefinition as NumericNodeDefinition;
 use Symfony\Component\Config\Definition\Builder\IntegerNodeDefinition;
 use Symfony\Component\Config\Definition\Builder\FloatNodeDefinition;
 
-class NumericNodeDefinitionTest extends \PHPUnit_Framework_TestCase
+class NumericNodeDefinitionTest extends TestCase
 {
     /**
      * @expectedException \InvalidArgumentException
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/TreeBuilderTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/TreeBuilderTest.php
index a146e89c32ae..16a10227cc29 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/TreeBuilderTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/TreeBuilderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Config\Tests\Definition\Builder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Tests\Definition\Builder\NodeBuilder as CustomNodeBuilder;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 
@@ -18,7 +19,7 @@
 require __DIR__.'/../../Fixtures/Builder/BarNodeDefinition.php';
 require __DIR__.'/../../Fixtures/Builder/VariableNodeDefinition.php';
 
-class TreeBuilderTest extends \PHPUnit_Framework_TestCase
+class TreeBuilderTest extends TestCase
 {
     public function testUsingACustomNodeBuilder()
     {
diff --git a/src/Symfony/Component/Config/Tests/Definition/Dumper/XmlReferenceDumperTest.php b/src/Symfony/Component/Config/Tests/Definition/Dumper/XmlReferenceDumperTest.php
index 2c0551d062ef..8676ead54c57 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Dumper/XmlReferenceDumperTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Dumper/XmlReferenceDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Config\Tests\Definition\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\Dumper\XmlReferenceDumper;
 use Symfony\Component\Config\Tests\Fixtures\Configuration\ExampleConfiguration;
 
-class XmlReferenceDumperTest extends \PHPUnit_Framework_TestCase
+class XmlReferenceDumperTest extends TestCase
 {
     public function testDumper()
     {
diff --git a/src/Symfony/Component/Config/Tests/Definition/Dumper/YamlReferenceDumperTest.php b/src/Symfony/Component/Config/Tests/Definition/Dumper/YamlReferenceDumperTest.php
index ba8cb0e3feb5..971f4afc7192 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Dumper/YamlReferenceDumperTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Dumper/YamlReferenceDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Config\Tests\Definition\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\Dumper\YamlReferenceDumper;
 use Symfony\Component\Config\Tests\Fixtures\Configuration\ExampleConfiguration;
 
-class YamlReferenceDumperTest extends \PHPUnit_Framework_TestCase
+class YamlReferenceDumperTest extends TestCase
 {
     public function testDumper()
     {
diff --git a/src/Symfony/Component/Config/Tests/Definition/EnumNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/EnumNodeTest.php
index 2b84de6b098f..691a0b65186c 100644
--- a/src/Symfony/Component/Config/Tests/Definition/EnumNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/EnumNodeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Definition;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\EnumNode;
 
-class EnumNodeTest extends \PHPUnit_Framework_TestCase
+class EnumNodeTest extends TestCase
 {
     public function testFinalizeValue()
     {
diff --git a/src/Symfony/Component/Config/Tests/Definition/FinalizationTest.php b/src/Symfony/Component/Config/Tests/Definition/FinalizationTest.php
index 19fc347d8f06..733f600850f5 100644
--- a/src/Symfony/Component/Config/Tests/Definition/FinalizationTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/FinalizationTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Config\Tests\Definition;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\Processor;
 use Symfony\Component\Config\Definition\NodeInterface;
 
-class FinalizationTest extends \PHPUnit_Framework_TestCase
+class FinalizationTest extends TestCase
 {
     public function testUnsetKeyWithDeepHierarchy()
     {
diff --git a/src/Symfony/Component/Config/Tests/Definition/FloatNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/FloatNodeTest.php
index 84afd6c10422..b7ec12fa739a 100644
--- a/src/Symfony/Component/Config/Tests/Definition/FloatNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/FloatNodeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Definition;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\FloatNode;
 
-class FloatNodeTest extends \PHPUnit_Framework_TestCase
+class FloatNodeTest extends TestCase
 {
     /**
      * @dataProvider getValidValues
diff --git a/src/Symfony/Component/Config/Tests/Definition/IntegerNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/IntegerNodeTest.php
index 58d21485993f..55e8a137b648 100644
--- a/src/Symfony/Component/Config/Tests/Definition/IntegerNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/IntegerNodeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Definition;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\IntegerNode;
 
-class IntegerNodeTest extends \PHPUnit_Framework_TestCase
+class IntegerNodeTest extends TestCase
 {
     /**
      * @dataProvider getValidValues
diff --git a/src/Symfony/Component/Config/Tests/Definition/MergeTest.php b/src/Symfony/Component/Config/Tests/Definition/MergeTest.php
index 08ddc3209e72..e539e25f3d02 100644
--- a/src/Symfony/Component/Config/Tests/Definition/MergeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/MergeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Definition;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 
-class MergeTest extends \PHPUnit_Framework_TestCase
+class MergeTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Config\Definition\Exception\ForbiddenOverwriteException
diff --git a/src/Symfony/Component/Config/Tests/Definition/NormalizationTest.php b/src/Symfony/Component/Config/Tests/Definition/NormalizationTest.php
index a896f9622148..f011f5422ffe 100644
--- a/src/Symfony/Component/Config/Tests/Definition/NormalizationTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/NormalizationTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Config\Tests\Definition;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\NodeInterface;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 
-class NormalizationTest extends \PHPUnit_Framework_TestCase
+class NormalizationTest extends TestCase
 {
     /**
      * @dataProvider getEncoderTests
diff --git a/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php
index 77013a14b2d9..1a5de41ccb01 100644
--- a/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Config\Tests\Definition;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\PrototypedArrayNode;
 use Symfony\Component\Config\Definition\ArrayNode;
 use Symfony\Component\Config\Definition\ScalarNode;
 use Symfony\Component\Config\Definition\VariableNode;
 
-class PrototypedArrayNodeTest extends \PHPUnit_Framework_TestCase
+class PrototypedArrayNodeTest extends TestCase
 {
     public function testGetDefaultValueReturnsAnEmptyArrayForPrototypes()
     {
diff --git a/src/Symfony/Component/Config/Tests/Definition/ScalarNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/ScalarNodeTest.php
index 86c1803018a6..1bc31b7c12d1 100644
--- a/src/Symfony/Component/Config/Tests/Definition/ScalarNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/ScalarNodeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Definition;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\ScalarNode;
 
-class ScalarNodeTest extends \PHPUnit_Framework_TestCase
+class ScalarNodeTest extends TestCase
 {
     /**
      * @dataProvider getValidValues
diff --git a/src/Symfony/Component/Config/Tests/Exception/FileLoaderLoadExceptionTest.php b/src/Symfony/Component/Config/Tests/Exception/FileLoaderLoadExceptionTest.php
index c3d050c75dc7..c1ad9150e6a9 100644
--- a/src/Symfony/Component/Config/Tests/Exception/FileLoaderLoadExceptionTest.php
+++ b/src/Symfony/Component/Config/Tests/Exception/FileLoaderLoadExceptionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Exception;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Exception\FileLoaderLoadException;
 
-class FileLoaderLoadExceptionTest extends \PHPUnit_Framework_TestCase
+class FileLoaderLoadExceptionTest extends TestCase
 {
     public function testMessageCannotLoadResource()
     {
diff --git a/src/Symfony/Component/Config/Tests/FileLocatorTest.php b/src/Symfony/Component/Config/Tests/FileLocatorTest.php
index d479f2569f1f..5b69f452697b 100644
--- a/src/Symfony/Component/Config/Tests/FileLocatorTest.php
+++ b/src/Symfony/Component/Config/Tests/FileLocatorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\FileLocator;
 
-class FileLocatorTest extends \PHPUnit_Framework_TestCase
+class FileLocatorTest extends TestCase
 {
     /**
      * @dataProvider getIsAbsolutePathTests
diff --git a/src/Symfony/Component/Config/Tests/Loader/DelegatingLoaderTest.php b/src/Symfony/Component/Config/Tests/Loader/DelegatingLoaderTest.php
index 8f3039df8ed4..4a01d26adf22 100644
--- a/src/Symfony/Component/Config/Tests/Loader/DelegatingLoaderTest.php
+++ b/src/Symfony/Component/Config/Tests/Loader/DelegatingLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Config\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Loader\LoaderResolver;
 use Symfony\Component\Config\Loader\DelegatingLoader;
 
-class DelegatingLoaderTest extends \PHPUnit_Framework_TestCase
+class DelegatingLoaderTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Config/Tests/Loader/FileLoaderTest.php b/src/Symfony/Component/Config/Tests/Loader/FileLoaderTest.php
index 8f46051bd8ba..e1d23e45fa6d 100644
--- a/src/Symfony/Component/Config/Tests/Loader/FileLoaderTest.php
+++ b/src/Symfony/Component/Config/Tests/Loader/FileLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Config\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Loader\FileLoader;
 use Symfony\Component\Config\Loader\LoaderResolver;
 
-class FileLoaderTest extends \PHPUnit_Framework_TestCase
+class FileLoaderTest extends TestCase
 {
     public function testImportWithFileLocatorDelegation()
     {
diff --git a/src/Symfony/Component/Config/Tests/Loader/LoaderResolverTest.php b/src/Symfony/Component/Config/Tests/Loader/LoaderResolverTest.php
index 1685f32ed060..0bf56b610ebd 100644
--- a/src/Symfony/Component/Config/Tests/Loader/LoaderResolverTest.php
+++ b/src/Symfony/Component/Config/Tests/Loader/LoaderResolverTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Loader\LoaderResolver;
 
-class LoaderResolverTest extends \PHPUnit_Framework_TestCase
+class LoaderResolverTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Config/Tests/Loader/LoaderTest.php b/src/Symfony/Component/Config/Tests/Loader/LoaderTest.php
index e9f79a8d6ddb..fefb1d728f44 100644
--- a/src/Symfony/Component/Config/Tests/Loader/LoaderTest.php
+++ b/src/Symfony/Component/Config/Tests/Loader/LoaderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Loader\Loader;
 
-class LoaderTest extends \PHPUnit_Framework_TestCase
+class LoaderTest extends TestCase
 {
     public function testGetSetResolver()
     {
diff --git a/src/Symfony/Component/Config/Tests/Resource/DirectoryResourceTest.php b/src/Symfony/Component/Config/Tests/Resource/DirectoryResourceTest.php
index 7117e4389bcb..60bd616a41de 100644
--- a/src/Symfony/Component/Config/Tests/Resource/DirectoryResourceTest.php
+++ b/src/Symfony/Component/Config/Tests/Resource/DirectoryResourceTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Resource;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Resource\DirectoryResource;
 
-class DirectoryResourceTest extends \PHPUnit_Framework_TestCase
+class DirectoryResourceTest extends TestCase
 {
     protected $directory;
 
diff --git a/src/Symfony/Component/Config/Tests/Resource/FileResourceTest.php b/src/Symfony/Component/Config/Tests/Resource/FileResourceTest.php
index db85cf7bd0ee..9e77c9480b4c 100644
--- a/src/Symfony/Component/Config/Tests/Resource/FileResourceTest.php
+++ b/src/Symfony/Component/Config/Tests/Resource/FileResourceTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Resource;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Resource\FileResource;
 
-class FileResourceTest extends \PHPUnit_Framework_TestCase
+class FileResourceTest extends TestCase
 {
     protected $resource;
     protected $file;
diff --git a/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php b/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php
index 237c197e025a..09a826586dbf 100644
--- a/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php
+++ b/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Util\XmlUtils;
 
-class XmlUtilsTest extends \PHPUnit_Framework_TestCase
+class XmlUtilsTest extends TestCase
 {
     public function testLoadFile()
     {
diff --git a/src/Symfony/Component/Console/Tests/ApplicationTest.php b/src/Symfony/Component/Console/Tests/ApplicationTest.php
index 9c9acd3ec616..78cc918ae022 100644
--- a/src/Symfony/Component/Console/Tests/ApplicationTest.php
+++ b/src/Symfony/Component/Console/Tests/ApplicationTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Helper\HelperSet;
 use Symfony\Component\Console\Helper\FormatterHelper;
@@ -30,7 +31,7 @@
 use Symfony\Component\Console\Event\ConsoleTerminateEvent;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 
-class ApplicationTest extends \PHPUnit_Framework_TestCase
+class ApplicationTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/Console/Tests/Command/CommandTest.php b/src/Symfony/Component/Console/Tests/Command/CommandTest.php
index 1468cbe2ea58..92b40b35c239 100644
--- a/src/Symfony/Component/Console/Tests/Command/CommandTest.php
+++ b/src/Symfony/Component/Console/Tests/Command/CommandTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Tests\Command;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Helper\FormatterHelper;
 use Symfony\Component\Console\Application;
@@ -23,7 +24,7 @@
 use Symfony\Component\Console\Output\NullOutput;
 use Symfony\Component\Console\Tester\CommandTester;
 
-class CommandTest extends \PHPUnit_Framework_TestCase
+class CommandTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/Console/Tests/Command/HelpCommandTest.php b/src/Symfony/Component/Console/Tests/Command/HelpCommandTest.php
index 9e068587f82b..a4e032a27e76 100644
--- a/src/Symfony/Component/Console/Tests/Command/HelpCommandTest.php
+++ b/src/Symfony/Component/Console/Tests/Command/HelpCommandTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Console\Tests\Command;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Tester\CommandTester;
 use Symfony\Component\Console\Command\HelpCommand;
 use Symfony\Component\Console\Command\ListCommand;
 use Symfony\Component\Console\Application;
 
-class HelpCommandTest extends \PHPUnit_Framework_TestCase
+class HelpCommandTest extends TestCase
 {
     public function testExecuteForCommandAlias()
     {
diff --git a/src/Symfony/Component/Console/Tests/Command/ListCommandTest.php b/src/Symfony/Component/Console/Tests/Command/ListCommandTest.php
index a166a040996b..fb6ee3bbacad 100644
--- a/src/Symfony/Component/Console/Tests/Command/ListCommandTest.php
+++ b/src/Symfony/Component/Console/Tests/Command/ListCommandTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Console\Tests\Command;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Tester\CommandTester;
 use Symfony\Component\Console\Application;
 
-class ListCommandTest extends \PHPUnit_Framework_TestCase
+class ListCommandTest extends TestCase
 {
     public function testExecuteListsCommands()
     {
diff --git a/src/Symfony/Component/Console/Tests/Descriptor/AbstractDescriptorTest.php b/src/Symfony/Component/Console/Tests/Descriptor/AbstractDescriptorTest.php
index 74e95b756997..fcbb719b6cd9 100644
--- a/src/Symfony/Component/Console/Tests/Descriptor/AbstractDescriptorTest.php
+++ b/src/Symfony/Component/Console/Tests/Descriptor/AbstractDescriptorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Tests\Descriptor;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputArgument;
@@ -18,7 +19,7 @@
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\BufferedOutput;
 
-abstract class AbstractDescriptorTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractDescriptorTest extends TestCase
 {
     /** @dataProvider getDescribeInputArgumentTestData */
     public function testDescribeInputArgument(InputArgument $argument, $expectedDescription)
diff --git a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleStackTest.php b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleStackTest.php
index 774df268ba12..6cd7c82b4a20 100644
--- a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleStackTest.php
+++ b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleStackTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Console\Tests\Formatter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Formatter\OutputFormatterStyleStack;
 use Symfony\Component\Console\Formatter\OutputFormatterStyle;
 
-class OutputFormatterStyleStackTest extends \PHPUnit_Framework_TestCase
+class OutputFormatterStyleStackTest extends TestCase
 {
     public function testPush()
     {
diff --git a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleTest.php b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleTest.php
index 0abfb3ce2755..f183450e44fa 100644
--- a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleTest.php
+++ b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Console\Tests\Formatter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Formatter\OutputFormatterStyle;
 
-class OutputFormatterStyleTest extends \PHPUnit_Framework_TestCase
+class OutputFormatterStyleTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php
index b8d5ca6d9beb..dc7b0358dea8 100644
--- a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php
+++ b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Console\Tests\Formatter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Formatter\OutputFormatter;
 use Symfony\Component\Console\Formatter\OutputFormatterStyle;
 
-class OutputFormatterTest extends \PHPUnit_Framework_TestCase
+class OutputFormatterTest extends TestCase
 {
     public function testEmptyTag()
     {
diff --git a/src/Symfony/Component/Console/Tests/Helper/FormatterHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/FormatterHelperTest.php
index 15b53e1da61e..746c2b464029 100644
--- a/src/Symfony/Component/Console/Tests/Helper/FormatterHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/FormatterHelperTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Helper\FormatterHelper;
 
-class FormatterHelperTest extends \PHPUnit_Framework_TestCase
+class FormatterHelperTest extends TestCase
 {
     public function testFormatSection()
     {
diff --git a/src/Symfony/Component/Console/Tests/Helper/HelperSetTest.php b/src/Symfony/Component/Console/Tests/Helper/HelperSetTest.php
index a31615ee80b6..8f42cf92e9ff 100644
--- a/src/Symfony/Component/Console/Tests/Helper/HelperSetTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/HelperSetTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Helper\HelperSet;
 use Symfony\Component\Console\Command\Command;
 
-class HelperSetTest extends \PHPUnit_Framework_TestCase
+class HelperSetTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Console/Tests/Helper/HelperTest.php b/src/Symfony/Component/Console/Tests/Helper/HelperTest.php
index 33fa22051a05..1847582444d1 100644
--- a/src/Symfony/Component/Console/Tests/Helper/HelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/HelperTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Helper\Helper;
 
-class HelperTest extends \PHPUnit_Framework_TestCase
+class HelperTest extends TestCase
 {
     public function formatTimeProvider()
     {
diff --git a/src/Symfony/Component/Console/Tests/Helper/LegacyDialogHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/LegacyDialogHelperTest.php
index 79bf7b172ade..d50366d1bf06 100644
--- a/src/Symfony/Component/Console/Tests/Helper/LegacyDialogHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/LegacyDialogHelperTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Input\ArrayInput;
 use Symfony\Component\Console\Helper\DialogHelper;
 use Symfony\Component\Console\Helper\HelperSet;
@@ -21,7 +22,7 @@
 /**
  * @group legacy
  */
-class LegacyDialogHelperTest extends \PHPUnit_Framework_TestCase
+class LegacyDialogHelperTest extends TestCase
 {
     public function testSelect()
     {
diff --git a/src/Symfony/Component/Console/Tests/Helper/LegacyProgressHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/LegacyProgressHelperTest.php
index bbb9f8b076b4..2e473c2eef17 100644
--- a/src/Symfony/Component/Console/Tests/Helper/LegacyProgressHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/LegacyProgressHelperTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Helper\ProgressHelper;
 use Symfony\Component\Console\Output\StreamOutput;
 
@@ -18,7 +19,7 @@
  * @group legacy
  * @group time-sensitive
  */
-class LegacyProgressHelperTest extends \PHPUnit_Framework_TestCase
+class LegacyProgressHelperTest extends TestCase
 {
     public function testAdvance()
     {
diff --git a/src/Symfony/Component/Console/Tests/Helper/LegacyTableHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/LegacyTableHelperTest.php
index 4875f79285f3..7c3130945366 100644
--- a/src/Symfony/Component/Console/Tests/Helper/LegacyTableHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/LegacyTableHelperTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Helper\TableHelper;
 use Symfony\Component\Console\Output\StreamOutput;
 
 /**
  * @group legacy
  */
-class LegacyTableHelperTest extends \PHPUnit_Framework_TestCase
+class LegacyTableHelperTest extends TestCase
 {
     protected $stream;
 
diff --git a/src/Symfony/Component/Console/Tests/Helper/ProcessHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/ProcessHelperTest.php
index b0d7f9c2f6f4..8069bcccc96a 100644
--- a/src/Symfony/Component/Console/Tests/Helper/ProcessHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/ProcessHelperTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Helper\DebugFormatterHelper;
 use Symfony\Component\Console\Helper\HelperSet;
 use Symfony\Component\Console\Output\StreamOutput;
@@ -18,7 +19,7 @@
 use Symfony\Component\Process\Process;
 use Symfony\Component\Process\ProcessBuilder;
 
-class ProcessHelperTest extends \PHPUnit_Framework_TestCase
+class ProcessHelperTest extends TestCase
 {
     /**
      * @dataProvider provideCommandsAndOutput
diff --git a/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php b/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php
index 612d13d7dc4d..d1616d107f02 100644
--- a/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Helper\ProgressBar;
 use Symfony\Component\Console\Helper\Helper;
 use Symfony\Component\Console\Output\StreamOutput;
@@ -18,7 +19,7 @@
 /**
  * @group time-sensitive
  */
-class ProgressBarTest extends \PHPUnit_Framework_TestCase
+class ProgressBarTest extends TestCase
 {
     public function testMultipleStart()
     {
diff --git a/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php
index 044459660a73..49ba0ee06c79 100644
--- a/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Formatter\OutputFormatter;
 use Symfony\Component\Console\Helper\QuestionHelper;
 use Symfony\Component\Console\Helper\HelperSet;
@@ -23,7 +24,7 @@
 /**
  * @group tty
  */
-class QuestionHelperTest extends \PHPUnit_Framework_TestCase
+class QuestionHelperTest extends TestCase
 {
     public function testAskChoice()
     {
diff --git a/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php
index 9bb50d52806a..1a2d1b8432f5 100644
--- a/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php
@@ -2,6 +2,7 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Helper\FormatterHelper;
 use Symfony\Component\Console\Helper\HelperSet;
 use Symfony\Component\Console\Helper\SymfonyQuestionHelper;
@@ -12,7 +13,7 @@
 /**
  * @group tty
  */
-class SymfonyQuestionHelperTest extends \PHPUnit_Framework_TestCase
+class SymfonyQuestionHelperTest extends TestCase
 {
     public function testAskChoice()
     {
diff --git a/src/Symfony/Component/Console/Tests/Helper/TableStyleTest.php b/src/Symfony/Component/Console/Tests/Helper/TableStyleTest.php
index 587d8414e6e2..13e918b3a0fe 100644
--- a/src/Symfony/Component/Console/Tests/Helper/TableStyleTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/TableStyleTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Helper\TableStyle;
 
-class TableStyleTest extends \PHPUnit_Framework_TestCase
+class TableStyleTest extends TestCase
 {
     /**
      * @expectedException        \InvalidArgumentException
diff --git a/src/Symfony/Component/Console/Tests/Helper/TableTest.php b/src/Symfony/Component/Console/Tests/Helper/TableTest.php
index 10cf34ddff84..2ff581e83ef8 100644
--- a/src/Symfony/Component/Console/Tests/Helper/TableTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/TableTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Helper\Table;
 use Symfony\Component\Console\Helper\TableStyle;
 use Symfony\Component\Console\Helper\TableSeparator;
 use Symfony\Component\Console\Helper\TableCell;
 use Symfony\Component\Console\Output\StreamOutput;
 
-class TableTest extends \PHPUnit_Framework_TestCase
+class TableTest extends TestCase
 {
     protected $stream;
 
diff --git a/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php b/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php
index 06347c87ba80..66d63e4d3855 100644
--- a/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Console\Tests\Input;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Input\ArgvInput;
 use Symfony\Component\Console\Input\InputDefinition;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputOption;
 
-class ArgvInputTest extends \PHPUnit_Framework_TestCase
+class ArgvInputTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php b/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php
index cc89083c6b1c..37e396a8ca14 100644
--- a/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Console\Tests\Input;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Input\ArrayInput;
 use Symfony\Component\Console\Input\InputDefinition;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputOption;
 
-class ArrayInputTest extends \PHPUnit_Framework_TestCase
+class ArrayInputTest extends TestCase
 {
     public function testGetFirstArgument()
     {
diff --git a/src/Symfony/Component/Console/Tests/Input/InputArgumentTest.php b/src/Symfony/Component/Console/Tests/Input/InputArgumentTest.php
index cfb37cd41061..0a62d98a4a4c 100644
--- a/src/Symfony/Component/Console/Tests/Input/InputArgumentTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/InputArgumentTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Console\Tests\Input;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Input\InputArgument;
 
-class InputArgumentTest extends \PHPUnit_Framework_TestCase
+class InputArgumentTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Console/Tests/Input/InputDefinitionTest.php b/src/Symfony/Component/Console/Tests/Input/InputDefinitionTest.php
index f3d2c0d64ee2..b19708ebb21c 100644
--- a/src/Symfony/Component/Console/Tests/Input/InputDefinitionTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/InputDefinitionTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Console\Tests\Input;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Input\InputDefinition;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputOption;
 
-class InputDefinitionTest extends \PHPUnit_Framework_TestCase
+class InputDefinitionTest extends TestCase
 {
     protected static $fixtures;
 
diff --git a/src/Symfony/Component/Console/Tests/Input/InputOptionTest.php b/src/Symfony/Component/Console/Tests/Input/InputOptionTest.php
index 53ce1df8cf3f..9c4df742d501 100644
--- a/src/Symfony/Component/Console/Tests/Input/InputOptionTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/InputOptionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Console\Tests\Input;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Input\InputOption;
 
-class InputOptionTest extends \PHPUnit_Framework_TestCase
+class InputOptionTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Console/Tests/Input/InputTest.php b/src/Symfony/Component/Console/Tests/Input/InputTest.php
index eb1c6617f564..42abd82eac11 100644
--- a/src/Symfony/Component/Console/Tests/Input/InputTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/InputTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Console\Tests\Input;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Input\ArrayInput;
 use Symfony\Component\Console\Input\InputDefinition;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputOption;
 
-class InputTest extends \PHPUnit_Framework_TestCase
+class InputTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Console/Tests/Input/StringInputTest.php b/src/Symfony/Component/Console/Tests/Input/StringInputTest.php
index c8a560f6b2f1..839af7387f4d 100644
--- a/src/Symfony/Component/Console/Tests/Input/StringInputTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/StringInputTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Console\Tests\Input;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Input\InputDefinition;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Input\StringInput;
 
-class StringInputTest extends \PHPUnit_Framework_TestCase
+class StringInputTest extends TestCase
 {
     /**
      * @dataProvider getTokenizeData
diff --git a/src/Symfony/Component/Console/Tests/Output/ConsoleOutputTest.php b/src/Symfony/Component/Console/Tests/Output/ConsoleOutputTest.php
index b3808c07cfbf..db39a02b8a61 100644
--- a/src/Symfony/Component/Console/Tests/Output/ConsoleOutputTest.php
+++ b/src/Symfony/Component/Console/Tests/Output/ConsoleOutputTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Console\Tests\Output;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Formatter\OutputFormatter;
 use Symfony\Component\Console\Output\ConsoleOutput;
 use Symfony\Component\Console\Output\Output;
 
-class ConsoleOutputTest extends \PHPUnit_Framework_TestCase
+class ConsoleOutputTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Console/Tests/Output/NullOutputTest.php b/src/Symfony/Component/Console/Tests/Output/NullOutputTest.php
index f09573f04da9..b7ff4be312ea 100644
--- a/src/Symfony/Component/Console/Tests/Output/NullOutputTest.php
+++ b/src/Symfony/Component/Console/Tests/Output/NullOutputTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Console\Tests\Output;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Formatter\OutputFormatter;
 use Symfony\Component\Console\Output\NullOutput;
 use Symfony\Component\Console\Output\Output;
 use Symfony\Component\Console\Output\OutputInterface;
 
-class NullOutputTest extends \PHPUnit_Framework_TestCase
+class NullOutputTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Console/Tests/Output/OutputTest.php b/src/Symfony/Component/Console/Tests/Output/OutputTest.php
index cfb4afe15ca6..f122c07a1bcc 100644
--- a/src/Symfony/Component/Console/Tests/Output/OutputTest.php
+++ b/src/Symfony/Component/Console/Tests/Output/OutputTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Console\Tests\Output;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Output\Output;
 use Symfony\Component\Console\Formatter\OutputFormatterStyle;
 
-class OutputTest extends \PHPUnit_Framework_TestCase
+class OutputTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Console/Tests/Output/StreamOutputTest.php b/src/Symfony/Component/Console/Tests/Output/StreamOutputTest.php
index 2fd4f612142e..780b5681fa8d 100644
--- a/src/Symfony/Component/Console/Tests/Output/StreamOutputTest.php
+++ b/src/Symfony/Component/Console/Tests/Output/StreamOutputTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Console\Tests\Output;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Output\Output;
 use Symfony\Component\Console\Output\StreamOutput;
 
-class StreamOutputTest extends \PHPUnit_Framework_TestCase
+class StreamOutputTest extends TestCase
 {
     protected $stream;
 
diff --git a/src/Symfony/Component/Console/Tests/Style/SymfonyStyleTest.php b/src/Symfony/Component/Console/Tests/Style/SymfonyStyleTest.php
index e4ce037bb8f1..ee9b09f8f97e 100644
--- a/src/Symfony/Component/Console/Tests/Style/SymfonyStyleTest.php
+++ b/src/Symfony/Component/Console/Tests/Style/SymfonyStyleTest.php
@@ -11,14 +11,14 @@
 
 namespace Symfony\Component\Console\Tests\Style;
 
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Style\SymfonyStyle;
 use Symfony\Component\Console\Tester\CommandTester;
 
-class SymfonyStyleTest extends PHPUnit_Framework_TestCase
+class SymfonyStyleTest extends TestCase
 {
     /** @var Command */
     protected $command;
diff --git a/src/Symfony/Component/Console/Tests/Tester/ApplicationTesterTest.php b/src/Symfony/Component/Console/Tests/Tester/ApplicationTesterTest.php
index a8389dd1866b..57e7136d5580 100644
--- a/src/Symfony/Component/Console/Tests/Tester/ApplicationTesterTest.php
+++ b/src/Symfony/Component/Console/Tests/Tester/ApplicationTesterTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Console\Tests\Tester;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Output\Output;
 use Symfony\Component\Console\Tester\ApplicationTester;
 
-class ApplicationTesterTest extends \PHPUnit_Framework_TestCase
+class ApplicationTesterTest extends TestCase
 {
     protected $application;
     protected $tester;
diff --git a/src/Symfony/Component/Console/Tests/Tester/CommandTesterTest.php b/src/Symfony/Component/Console/Tests/Tester/CommandTesterTest.php
index b54c00e83dc8..8d4e05a760cd 100644
--- a/src/Symfony/Component/Console/Tests/Tester/CommandTesterTest.php
+++ b/src/Symfony/Component/Console/Tests/Tester/CommandTesterTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Console\Tests\Tester;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Output\Output;
 use Symfony\Component\Console\Tester\CommandTester;
 
-class CommandTesterTest extends \PHPUnit_Framework_TestCase
+class CommandTesterTest extends TestCase
 {
     protected $command;
     protected $tester;
diff --git a/src/Symfony/Component/CssSelector/Tests/CssSelectorTest.php b/src/Symfony/Component/CssSelector/Tests/CssSelectorTest.php
index 61ab80eec8d0..f1dee1ee11ee 100644
--- a/src/Symfony/Component/CssSelector/Tests/CssSelectorTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/CssSelectorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\CssSelector\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\CssSelector;
 
-class CssSelectorTest extends \PHPUnit_Framework_TestCase
+class CssSelectorTest extends TestCase
 {
     public function testCssToXPath()
     {
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/AbstractNodeTest.php b/src/Symfony/Component/CssSelector/Tests/Node/AbstractNodeTest.php
index 932e8030dd89..595551338061 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/AbstractNodeTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/AbstractNodeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\CssSelector\Tests\Node;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\Node\NodeInterface;
 
-abstract class AbstractNodeTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractNodeTest extends TestCase
 {
     /** @dataProvider getToStringConversionTestData */
     public function testToStringConversion(NodeInterface $node, $representation)
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/SpecificityTest.php b/src/Symfony/Component/CssSelector/Tests/Node/SpecificityTest.php
index c34fe5fc7348..b58eb8929c85 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/SpecificityTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/SpecificityTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\CssSelector\Tests\Node;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\Node\Specificity;
 
-class SpecificityTest extends \PHPUnit_Framework_TestCase
+class SpecificityTest extends TestCase
 {
     /** @dataProvider getValueTestData */
     public function testValue(Specificity $specificity, $value)
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php
index 57afa5a2422b..8005616a9208 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\CssSelector\Tests\Parser\Handler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\Parser\Reader;
 use Symfony\Component\CssSelector\Parser\Token;
 use Symfony\Component\CssSelector\Parser\TokenStream;
@@ -18,7 +19,7 @@
 /**
  * @author Jean-François Simon <contact@jfsimon.fr>
  */
-abstract class AbstractHandlerTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractHandlerTest extends TestCase
 {
     /** @dataProvider getHandleValueTestData */
     public function testHandleValue($value, Token $expectedToken, $remainingContent)
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php
index 0454d9faa6f7..0844709d9654 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\CssSelector\Tests\Parser;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\Exception\SyntaxErrorException;
 use Symfony\Component\CssSelector\Node\FunctionNode;
 use Symfony\Component\CssSelector\Node\SelectorNode;
 use Symfony\Component\CssSelector\Parser\Parser;
 use Symfony\Component\CssSelector\Parser\Token;
 
-class ParserTest extends \PHPUnit_Framework_TestCase
+class ParserTest extends TestCase
 {
     /** @dataProvider getParserTestData */
     public function testParser($source, $representation)
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/ReaderTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/ReaderTest.php
index 03c054eaaeeb..21eb60846240 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/ReaderTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/ReaderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\CssSelector\Tests\Parser;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\Parser\Reader;
 
-class ReaderTest extends \PHPUnit_Framework_TestCase
+class ReaderTest extends TestCase
 {
     public function testIsEOF()
     {
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ClassParserTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ClassParserTest.php
index 6efdd6765763..7e92f5baeed1 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ClassParserTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ClassParserTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\CssSelector\Tests\Parser\Shortcut;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\Node\SelectorNode;
 use Symfony\Component\CssSelector\Parser\Shortcut\ClassParser;
 
 /**
  * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
  */
-class ClassParserTest extends \PHPUnit_Framework_TestCase
+class ClassParserTest extends TestCase
 {
     /** @dataProvider getParseTestData */
     public function testParse($source, $representation)
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ElementParserTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ElementParserTest.php
index b30b5ee7acd1..05a730fde15a 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ElementParserTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ElementParserTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\CssSelector\Tests\Parser\Shortcut;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\Node\SelectorNode;
 use Symfony\Component\CssSelector\Parser\Shortcut\ElementParser;
 
 /**
  * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
  */
-class ElementParserTest extends \PHPUnit_Framework_TestCase
+class ElementParserTest extends TestCase
 {
     /** @dataProvider getParseTestData */
     public function testParse($source, $representation)
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/EmptyStringParserTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/EmptyStringParserTest.php
index b7c3539c67a9..1cf742cf2016 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/EmptyStringParserTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/EmptyStringParserTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\CssSelector\Tests\Parser\Shortcut;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\Node\SelectorNode;
 use Symfony\Component\CssSelector\Parser\Shortcut\EmptyStringParser;
 
 /**
  * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
  */
-class EmptyStringParserTest extends \PHPUnit_Framework_TestCase
+class EmptyStringParserTest extends TestCase
 {
     public function testParse()
     {
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/HashParserTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/HashParserTest.php
index d2ce891ec820..82f555d9abf1 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/HashParserTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/HashParserTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\CssSelector\Tests\Parser\Shortcut;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\Node\SelectorNode;
 use Symfony\Component\CssSelector\Parser\Shortcut\HashParser;
 
 /**
  * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
  */
-class HashParserTest extends \PHPUnit_Framework_TestCase
+class HashParserTest extends TestCase
 {
     /** @dataProvider getParseTestData */
     public function testParse($source, $representation)
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/TokenStreamTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/TokenStreamTest.php
index 8f3253a7d59f..d6ff1132e607 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/TokenStreamTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/TokenStreamTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\CssSelector\Tests\Parser;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\Parser\Token;
 use Symfony\Component\CssSelector\Parser\TokenStream;
 
-class TokenStreamTest extends \PHPUnit_Framework_TestCase
+class TokenStreamTest extends TestCase
 {
     public function testGetNext()
     {
diff --git a/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php b/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php
index 407458f48f2c..79e2da14bb24 100644
--- a/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\CssSelector\Tests\XPath;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\XPath\Extension\HtmlExtension;
 use Symfony\Component\CssSelector\XPath\Translator;
 
-class TranslatorTest extends \PHPUnit_Framework_TestCase
+class TranslatorTest extends TestCase
 {
     /** @dataProvider getXpathLiteralTestData */
     public function testXpathLiteral($value, $literal)
diff --git a/src/Symfony/Component/Debug/Tests/DebugClassLoaderTest.php b/src/Symfony/Component/Debug/Tests/DebugClassLoaderTest.php
index eeec0e0beb08..8d0a027346b3 100644
--- a/src/Symfony/Component/Debug/Tests/DebugClassLoaderTest.php
+++ b/src/Symfony/Component/Debug/Tests/DebugClassLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Debug\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\DebugClassLoader;
 use Symfony\Component\Debug\ErrorHandler;
 
-class DebugClassLoaderTest extends \PHPUnit_Framework_TestCase
+class DebugClassLoaderTest extends TestCase
 {
     /**
      * @var int Error reporting level before running tests
diff --git a/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php b/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php
index 973c3d750169..898a985a29e2 100644
--- a/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Debug\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Psr\Log\LogLevel;
 use Symfony\Component\Debug\ErrorHandler;
 use Symfony\Component\Debug\Exception\ContextErrorException;
@@ -21,7 +22,7 @@
  * @author Robert Schönthal <seroscho@googlemail.com>
  * @author Nicolas Grekas <p@tchwork.com>
  */
-class ErrorHandlerTest extends \PHPUnit_Framework_TestCase
+class ErrorHandlerTest extends TestCase
 {
     public function testRegister()
     {
diff --git a/src/Symfony/Component/Debug/Tests/Exception/FlattenExceptionTest.php b/src/Symfony/Component/Debug/Tests/Exception/FlattenExceptionTest.php
index 6c570e235def..ae01e9cb0d83 100644
--- a/src/Symfony/Component/Debug/Tests/Exception/FlattenExceptionTest.php
+++ b/src/Symfony/Component/Debug/Tests/Exception/FlattenExceptionTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Debug\Tests\Exception;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\Exception\FlattenException;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;
@@ -27,7 +28,7 @@
 use Symfony\Component\HttpKernel\Exception\TooManyRequestsHttpException;
 use Symfony\Component\HttpKernel\Exception\UnsupportedMediaTypeHttpException;
 
-class FlattenExceptionTest extends \PHPUnit_Framework_TestCase
+class FlattenExceptionTest extends TestCase
 {
     public function testStatusCode()
     {
diff --git a/src/Symfony/Component/Debug/Tests/ExceptionHandlerTest.php b/src/Symfony/Component/Debug/Tests/ExceptionHandlerTest.php
index fb105828d23f..77cc0b5cbdd4 100644
--- a/src/Symfony/Component/Debug/Tests/ExceptionHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/ExceptionHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Debug\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\ExceptionHandler;
 use Symfony\Component\Debug\Exception\OutOfMemoryException;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
@@ -18,7 +19,7 @@
 
 require_once __DIR__.'/HeaderMock.php';
 
-class ExceptionHandlerTest extends \PHPUnit_Framework_TestCase
+class ExceptionHandlerTest extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
index c93983721f6c..0611ed91e31d 100644
--- a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Debug\Tests\FatalErrorHandler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ClassLoader\ClassLoader as SymfonyClassLoader;
 use Symfony\Component\ClassLoader\UniversalClassLoader as SymfonyUniversalClassLoader;
 use Symfony\Component\Debug\Exception\FatalErrorException;
@@ -18,7 +19,7 @@
 use Symfony\Component\Debug\DebugClassLoader;
 use Composer\Autoload\ClassLoader as ComposerClassLoader;
 
-class ClassNotFoundFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
+class ClassNotFoundFatalErrorHandlerTest extends TestCase
 {
     public static function setUpBeforeClass()
     {
diff --git a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php
index 795b74781c23..1dc2120045c2 100644
--- a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Debug\Tests\FatalErrorHandler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\FatalErrorHandler\UndefinedFunctionFatalErrorHandler;
 
-class UndefinedFunctionFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
+class UndefinedFunctionFatalErrorHandlerTest extends TestCase
 {
     /**
      * @dataProvider provideUndefinedFunctionData
diff --git a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php
index 22cbc3033bd6..739e5b2b15b7 100644
--- a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Debug\Tests\FatalErrorHandler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\Exception\FatalErrorException;
 use Symfony\Component\Debug\FatalErrorHandler\UndefinedMethodFatalErrorHandler;
 
-class UndefinedMethodFatalErrorHandlerTest extends \PHPUnit_Framework_TestCase
+class UndefinedMethodFatalErrorHandlerTest extends TestCase
 {
     /**
      * @dataProvider provideUndefinedMethodData
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AnalyzeServiceReferencesPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AnalyzeServiceReferencesPassTest.php
index 04fe7c2cf116..1c374662ff2e 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AnalyzeServiceReferencesPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AnalyzeServiceReferencesPassTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Compiler\AnalyzeServiceReferencesPass;
 use Symfony\Component\DependencyInjection\Compiler\RepeatedPass;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class AnalyzeServiceReferencesPassTest extends \PHPUnit_Framework_TestCase
+class AnalyzeServiceReferencesPassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutoAliasServicePassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutoAliasServicePassTest.php
index e3aba6d7074c..f8199b8c9f79 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutoAliasServicePassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutoAliasServicePassTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Compiler\AutoAliasServicePass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class AutoAliasServicePassTest extends \PHPUnit_Framework_TestCase
+class AutoAliasServicePassTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckCircularReferencesPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckCircularReferencesPassTest.php
index 55351e551c87..d894f7ab6f6d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckCircularReferencesPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckCircularReferencesPassTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Compiler\CheckCircularReferencesPass;
 use Symfony\Component\DependencyInjection\Compiler\AnalyzeServiceReferencesPass;
 use Symfony\Component\DependencyInjection\Compiler\Compiler;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class CheckCircularReferencesPassTest extends \PHPUnit_Framework_TestCase
+class CheckCircularReferencesPassTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckDefinitionValidityPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckDefinitionValidityPassTest.php
index 4e8efdc8b4fa..60f44c3f0224 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckDefinitionValidityPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckDefinitionValidityPassTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Compiler\CheckDefinitionValidityPass;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class CheckDefinitionValidityPassTest extends \PHPUnit_Framework_TestCase
+class CheckDefinitionValidityPassTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\DependencyInjection\Exception\RuntimeException
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckExceptionOnInvalidReferenceBehaviorPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckExceptionOnInvalidReferenceBehaviorPassTest.php
index 18b605b4671c..c5f4ec7f9569 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckExceptionOnInvalidReferenceBehaviorPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckExceptionOnInvalidReferenceBehaviorPassTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Compiler\CheckExceptionOnInvalidReferenceBehaviorPass;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class CheckExceptionOnInvalidReferenceBehaviorPassTest extends \PHPUnit_Framework_TestCase
+class CheckExceptionOnInvalidReferenceBehaviorPassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckReferenceValidityPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckReferenceValidityPassTest.php
index cd4448a96abf..d7e15df9e43a 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckReferenceValidityPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckReferenceValidityPassTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Scope;
 use Symfony\Component\DependencyInjection\Compiler\CheckReferenceValidityPass;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class CheckReferenceValidityPassTest extends \PHPUnit_Framework_TestCase
+class CheckReferenceValidityPassTest extends TestCase
 {
     public function testProcessIgnoresScopeWideningIfNonStrictReference()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php
index 10781e255e37..7f935acbfc91 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Alias;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Compiler\DecoratorServicePass;
 
-class DecoratorServicePassTest extends \PHPUnit_Framework_TestCase
+class DecoratorServicePassTest extends TestCase
 {
     public function testProcessWithoutAlias()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ExtensionCompilerPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ExtensionCompilerPassTest.php
index 33060dcd0e29..e08361145877 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ExtensionCompilerPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ExtensionCompilerPassTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Compiler\ExtensionCompilerPass;
 
 /**
  * @author Wouter J <wouter@wouterj.nl>
  */
-class ExtensionCompilerPassTest extends \PHPUnit_Framework_TestCase
+class ExtensionCompilerPassTest extends TestCase
 {
     private $container;
     private $pass;
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/InlineServiceDefinitionsPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/InlineServiceDefinitionsPassTest.php
index 590ca4cfae2f..e3056cf4fde6 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/InlineServiceDefinitionsPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/InlineServiceDefinitionsPassTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Scope;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Compiler\AnalyzeServiceReferencesPass;
@@ -19,7 +20,7 @@
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class InlineServiceDefinitionsPassTest extends \PHPUnit_Framework_TestCase
+class InlineServiceDefinitionsPassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/IntegrationTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/IntegrationTest.php
index c4479403aa3d..db33d4b4a14d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/IntegrationTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/IntegrationTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Alias;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -18,7 +19,7 @@
 /**
  * This class tests the integration of the different compiler passes.
  */
-class IntegrationTest extends \PHPUnit_Framework_TestCase
+class IntegrationTest extends TestCase
 {
     /**
      * This tests that dependencies are correctly processed.
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/LegacyResolveParameterPlaceHoldersPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/LegacyResolveParameterPlaceHoldersPassTest.php
index e730a1a288a8..8450ee98988a 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/LegacyResolveParameterPlaceHoldersPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/LegacyResolveParameterPlaceHoldersPassTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Compiler\ResolveParameterPlaceHoldersPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
 /**
  * @group legacy
  */
-class LegacyResolveParameterPlaceHoldersPassTest extends \PHPUnit_Framework_TestCase
+class LegacyResolveParameterPlaceHoldersPassTest extends TestCase
 {
     public function testFactoryClassParametersShouldBeResolved()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/MergeExtensionConfigurationPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/MergeExtensionConfigurationPassTest.php
index 6ba0b2f48110..b35521d20620 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/MergeExtensionConfigurationPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/MergeExtensionConfigurationPassTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 use Symfony\Component\Config\Resource\FileResource;
@@ -18,7 +19,7 @@
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
 
-class MergeExtensionConfigurationPassTest extends \PHPUnit_Framework_TestCase
+class MergeExtensionConfigurationPassTest extends TestCase
 {
     public function testExpressionLanguageProviderForwarding()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/RemoveUnusedDefinitionsPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/RemoveUnusedDefinitionsPassTest.php
index 82149ebdb3c1..57dd42b487ab 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/RemoveUnusedDefinitionsPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/RemoveUnusedDefinitionsPassTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Compiler\AnalyzeServiceReferencesPass;
 use Symfony\Component\DependencyInjection\Compiler\RepeatedPass;
 use Symfony\Component\DependencyInjection\Compiler\RemoveUnusedDefinitionsPass;
@@ -18,7 +19,7 @@
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class RemoveUnusedDefinitionsPassTest extends \PHPUnit_Framework_TestCase
+class RemoveUnusedDefinitionsPassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ReplaceAliasByActualDefinitionPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ReplaceAliasByActualDefinitionPassTest.php
index 1b2ec6bd7604..7e7c3e41e2a8 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ReplaceAliasByActualDefinitionPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ReplaceAliasByActualDefinitionPassTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Compiler\ReplaceAliasByActualDefinitionPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
@@ -18,7 +19,7 @@
 
 require_once __DIR__.'/../Fixtures/includes/foo.php';
 
-class ReplaceAliasByActualDefinitionPassTest extends \PHPUnit_Framework_TestCase
+class ReplaceAliasByActualDefinitionPassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveDefinitionTemplatesPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveDefinitionTemplatesPassTest.php
index 845edd2c1419..6d7ab4b013e5 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveDefinitionTemplatesPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveDefinitionTemplatesPassTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\DefinitionDecorator;
 use Symfony\Component\DependencyInjection\Compiler\ResolveDefinitionTemplatesPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class ResolveDefinitionTemplatesPassTest extends \PHPUnit_Framework_TestCase
+class ResolveDefinitionTemplatesPassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInvalidReferencesPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInvalidReferencesPassTest.php
index 72058868d44e..53e314e23df6 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInvalidReferencesPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInvalidReferencesPassTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Compiler\ResolveInvalidReferencesPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class ResolveInvalidReferencesPassTest extends \PHPUnit_Framework_TestCase
+class ResolveInvalidReferencesPassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveParameterPlaceHoldersPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveParameterPlaceHoldersPassTest.php
index 1f604c228f13..50be82d74111 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveParameterPlaceHoldersPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveParameterPlaceHoldersPassTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Compiler\ResolveParameterPlaceHoldersPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class ResolveParameterPlaceHoldersPassTest extends \PHPUnit_Framework_TestCase
+class ResolveParameterPlaceHoldersPassTest extends TestCase
 {
     private $compilerPass;
     private $container;
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveReferencesToAliasesPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveReferencesToAliasesPassTest.php
index 651ca85a5b8b..aaf2f5593a96 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveReferencesToAliasesPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveReferencesToAliasesPassTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Alias;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Compiler\ResolveReferencesToAliasesPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
-class ResolveReferencesToAliasesPassTest extends \PHPUnit_Framework_TestCase
+class ResolveReferencesToAliasesPassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php b/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
index 77015aab2500..192abb7092c0 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
@@ -14,6 +14,7 @@
 require_once __DIR__.'/Fixtures/includes/classes.php';
 require_once __DIR__.'/Fixtures/includes/ProjectExtension.php';
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Resource\ResourceInterface;
 use Symfony\Component\DependencyInjection\Alias;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -32,7 +33,7 @@
 use Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition;
 use Symfony\Component\ExpressionLanguage\Expression;
 
-class ContainerBuilderTest extends \PHPUnit_Framework_TestCase
+class ContainerBuilderTest extends TestCase
 {
     public function testDefinitions()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php b/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php
index 83a805d61212..02018c5a0a99 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\DependencyInjection\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Scope;
 use Symfony\Component\DependencyInjection\Container;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
 use Symfony\Component\DependencyInjection\Exception\InactiveScopeException;
 
-class ContainerTest extends \PHPUnit_Framework_TestCase
+class ContainerTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/CrossCheckTest.php b/src/Symfony/Component/DependencyInjection/Tests/CrossCheckTest.php
index f81fcf060896..6bdc8f4f4950 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/CrossCheckTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/CrossCheckTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\DependencyInjection\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\Config\FileLocator;
 
-class CrossCheckTest extends \PHPUnit_Framework_TestCase
+class CrossCheckTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/DefinitionDecoratorTest.php b/src/Symfony/Component/DependencyInjection/Tests/DefinitionDecoratorTest.php
index 732eead1407b..9581743fd5d6 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/DefinitionDecoratorTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/DefinitionDecoratorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\DependencyInjection\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\DefinitionDecorator;
 
-class DefinitionDecoratorTest extends \PHPUnit_Framework_TestCase
+class DefinitionDecoratorTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php b/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
index 0d3cb8a000bf..8ca51c0b6efe 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\DependencyInjection\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Definition;
 
-class DefinitionTest extends \PHPUnit_Framework_TestCase
+class DefinitionTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/GraphvizDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/GraphvizDumperTest.php
index 5da11359fa8b..f457c1776b36 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/GraphvizDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/GraphvizDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Dumper\GraphvizDumper;
 
-class GraphvizDumperTest extends \PHPUnit_Framework_TestCase
+class GraphvizDumperTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
index 05918b14ec52..d46b250c51ce 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\DependencyInjection\Tests\Dumper;
 
 use DummyProxyDumper;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Dumper\PhpDumper;
 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
@@ -22,7 +23,7 @@
 
 require_once __DIR__.'/../Fixtures/includes/classes.php';
 
-class PhpDumperTest extends \PHPUnit_Framework_TestCase
+class PhpDumperTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php
index 8aa544c728f4..9f96f33e9dec 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Dumper\XmlDumper;
 
-class XmlDumperTest extends \PHPUnit_Framework_TestCase
+class XmlDumperTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php
index 0f421c0127e5..f19a2f5cb834 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Dumper\YamlDumper;
 use Symfony\Component\Yaml\Yaml;
 
-class YamlDumperTest extends \PHPUnit_Framework_TestCase
+class YamlDumperTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php b/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php
index e7f19a6e94dc..90852c359e51 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Extension;
 
-class ExtensionTest extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class ExtensionTest extends TestCase
 {
     /**
      * @dataProvider getResolvedEnabledFixtures
diff --git a/src/Symfony/Component/DependencyInjection/Tests/LazyProxy/Instantiator/RealServiceInstantiatorTest.php b/src/Symfony/Component/DependencyInjection/Tests/LazyProxy/Instantiator/RealServiceInstantiatorTest.php
index a3524c3d7263..f93965f46ebf 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/LazyProxy/Instantiator/RealServiceInstantiatorTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/LazyProxy/Instantiator/RealServiceInstantiatorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\LazyProxy\Instantiator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\LazyProxy\Instantiator\RealServiceInstantiator;
 
@@ -19,7 +20,7 @@
  *
  * @author Marco Pivetta <ocramius@gmail.com>
  */
-class RealServiceInstantiatorTest extends \PHPUnit_Framework_TestCase
+class RealServiceInstantiatorTest extends TestCase
 {
     public function testInstantiateProxy()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/LazyProxy/PhpDumper/NullDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/LazyProxy/PhpDumper/NullDumperTest.php
index 1fcedca5f98c..cde2c147e752 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/LazyProxy/PhpDumper/NullDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/LazyProxy/PhpDumper/NullDumperTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\LazyProxy\PhpDumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\LazyProxy\PhpDumper\NullDumper;
 
@@ -19,7 +20,7 @@
  *
  * @author Marco Pivetta <ocramius@gmail.com>
  */
-class NullDumperTest extends \PHPUnit_Framework_TestCase
+class NullDumperTest extends TestCase
 {
     public function testNullDumper()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/LegacyContainerBuilderTest.php b/src/Symfony/Component/DependencyInjection/Tests/LegacyContainerBuilderTest.php
index 81d2b51a2fa9..1cb8d33b6ed4 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/LegacyContainerBuilderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/LegacyContainerBuilderTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\DependencyInjection\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
 
 /**
  * @group legacy
  */
-class LegacyContainerBuilderTest extends \PHPUnit_Framework_TestCase
+class LegacyContainerBuilderTest extends TestCase
 {
     public function testCreateServiceFactoryMethod()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/LegacyDefinitionTest.php b/src/Symfony/Component/DependencyInjection/Tests/LegacyDefinitionTest.php
index 07891fff6dc5..a605729f97ad 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/LegacyDefinitionTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/LegacyDefinitionTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\DependencyInjection\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Definition;
 
 /**
  * @group legacy
  */
-class LegacyDefinitionTest extends \PHPUnit_Framework_TestCase
+class LegacyDefinitionTest extends TestCase
 {
     public function testSetGetFactoryClass()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/ClosureLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/ClosureLoaderTest.php
index be057313ab90..125e09b6cf8f 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/ClosureLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/ClosureLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Loader\ClosureLoader;
 
-class ClosureLoaderTest extends \PHPUnit_Framework_TestCase
+class ClosureLoaderTest extends TestCase
 {
     public function testSupports()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/IniFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/IniFileLoaderTest.php
index cab44b20c74c..70fbf306070c 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/IniFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/IniFileLoaderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Loader\IniFileLoader;
 use Symfony\Component\Config\FileLocator;
 
-class IniFileLoaderTest extends \PHPUnit_Framework_TestCase
+class IniFileLoaderTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/PhpFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/PhpFileLoaderTest.php
index 00b957b73115..b936bf5e63ce 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/PhpFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/PhpFileLoaderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Loader\PhpFileLoader;
 use Symfony\Component\Config\FileLocator;
 
-class PhpFileLoaderTest extends \PHPUnit_Framework_TestCase
+class PhpFileLoaderTest extends TestCase
 {
     public function testSupports()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
index 8c6674efe715..66da1912c479 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
@@ -21,7 +22,7 @@
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\ExpressionLanguage\Expression;
 
-class XmlFileLoaderTest extends \PHPUnit_Framework_TestCase
+class XmlFileLoaderTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
index b2082f07a126..85a52ad1c245 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
@@ -21,7 +22,7 @@
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\ExpressionLanguage\Expression;
 
-class YamlFileLoaderTest extends \PHPUnit_Framework_TestCase
+class YamlFileLoaderTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/FrozenParameterBagTest.php b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/FrozenParameterBagTest.php
index b87ca916bbfe..ef9a66f6cff7 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/FrozenParameterBagTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/FrozenParameterBagTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\ParameterBag;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 
-class FrozenParameterBagTest extends \PHPUnit_Framework_TestCase
+class FrozenParameterBagTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ParameterBagTest.php b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ParameterBagTest.php
index 39dfb48455b4..ae6b1990954b 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ParameterBagTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ParameterBagTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\ParameterBag;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
 use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
 use Symfony\Component\DependencyInjection\Exception\ParameterCircularReferenceException;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 
-class ParameterBagTest extends \PHPUnit_Framework_TestCase
+class ParameterBagTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ParameterTest.php b/src/Symfony/Component/DependencyInjection/Tests/ParameterTest.php
index 571ca029881f..975e5582c22f 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ParameterTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ParameterTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\DependencyInjection\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Parameter;
 
-class ParameterTest extends \PHPUnit_Framework_TestCase
+class ParameterTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ReferenceTest.php b/src/Symfony/Component/DependencyInjection/Tests/ReferenceTest.php
index 6800267c96b1..ec0803fa3b8b 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ReferenceTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ReferenceTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\DependencyInjection\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Reference;
 
-class ReferenceTest extends \PHPUnit_Framework_TestCase
+class ReferenceTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php b/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
index 5d5c633888fa..8e34a361580a 100755
--- a/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\DomCrawler\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\CssSelector;
 use Symfony\Component\DomCrawler\Crawler;
 
-class CrawlerTest extends \PHPUnit_Framework_TestCase
+class CrawlerTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTestCase.php b/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTestCase.php
index 26b1b0e24465..2059d049c1d0 100644
--- a/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTestCase.php
+++ b/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTestCase.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\DomCrawler\Tests\Field;
 
-class FormFieldTestCase extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class FormFieldTestCase extends TestCase
 {
     protected function createNode($tag, $value, $attributes = array())
     {
diff --git a/src/Symfony/Component/DomCrawler/Tests/FormTest.php b/src/Symfony/Component/DomCrawler/Tests/FormTest.php
index b052db213463..0a4cd7201e1b 100644
--- a/src/Symfony/Component/DomCrawler/Tests/FormTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/FormTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\DomCrawler\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DomCrawler\Form;
 use Symfony\Component\DomCrawler\FormFieldRegistry;
 
-class FormTest extends \PHPUnit_Framework_TestCase
+class FormTest extends TestCase
 {
     public static function setUpBeforeClass()
     {
diff --git a/src/Symfony/Component/DomCrawler/Tests/LinkTest.php b/src/Symfony/Component/DomCrawler/Tests/LinkTest.php
index 98a45a3a0cef..3f0364705f98 100644
--- a/src/Symfony/Component/DomCrawler/Tests/LinkTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/LinkTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\DomCrawler\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DomCrawler\Link;
 
-class LinkTest extends \PHPUnit_Framework_TestCase
+class LinkTest extends TestCase
 {
     /**
      * @expectedException \LogicException
diff --git a/src/Symfony/Component/EventDispatcher/Tests/AbstractEventDispatcherTest.php b/src/Symfony/Component/EventDispatcher/Tests/AbstractEventDispatcherTest.php
index bae74bb888df..bde6caa4eeb3 100644
--- a/src/Symfony/Component/EventDispatcher/Tests/AbstractEventDispatcherTest.php
+++ b/src/Symfony/Component/EventDispatcher/Tests/AbstractEventDispatcherTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\EventDispatcher\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\EventDispatcher\Event;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
-abstract class AbstractEventDispatcherTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractEventDispatcherTest extends TestCase
 {
     /* Some pseudo events */
     const preFoo = 'pre.foo';
diff --git a/src/Symfony/Component/EventDispatcher/Tests/Debug/TraceableEventDispatcherTest.php b/src/Symfony/Component/EventDispatcher/Tests/Debug/TraceableEventDispatcherTest.php
index 1b424e93fcaa..9ee85bb0ac25 100644
--- a/src/Symfony/Component/EventDispatcher/Tests/Debug/TraceableEventDispatcherTest.php
+++ b/src/Symfony/Component/EventDispatcher/Tests/Debug/TraceableEventDispatcherTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\EventDispatcher\Tests\Debug;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
@@ -18,7 +19,7 @@
 use Symfony\Component\EventDispatcher\Event;
 use Symfony\Component\Stopwatch\Stopwatch;
 
-class TraceableEventDispatcherTest extends \PHPUnit_Framework_TestCase
+class TraceableEventDispatcherTest extends TestCase
 {
     public function testAddRemoveListener()
     {
diff --git a/src/Symfony/Component/EventDispatcher/Tests/DependencyInjection/RegisterListenersPassTest.php b/src/Symfony/Component/EventDispatcher/Tests/DependencyInjection/RegisterListenersPassTest.php
index cb04f74beb6d..53d7282b37a7 100644
--- a/src/Symfony/Component/EventDispatcher/Tests/DependencyInjection/RegisterListenersPassTest.php
+++ b/src/Symfony/Component/EventDispatcher/Tests/DependencyInjection/RegisterListenersPassTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\EventDispatcher\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\EventDispatcher\DependencyInjection\RegisterListenersPass;
 
-class RegisterListenersPassTest extends \PHPUnit_Framework_TestCase
+class RegisterListenersPassTest extends TestCase
 {
     /**
      * Tests that event subscribers not implementing EventSubscriberInterface
diff --git a/src/Symfony/Component/EventDispatcher/Tests/EventTest.php b/src/Symfony/Component/EventDispatcher/Tests/EventTest.php
index 9a822670cd5e..bdc14abbf5a3 100644
--- a/src/Symfony/Component/EventDispatcher/Tests/EventTest.php
+++ b/src/Symfony/Component/EventDispatcher/Tests/EventTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\EventDispatcher\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\EventDispatcher\Event;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 
 /**
  * Test class for Event.
  */
-class EventTest extends \PHPUnit_Framework_TestCase
+class EventTest extends TestCase
 {
     /**
      * @var \Symfony\Component\EventDispatcher\Event
diff --git a/src/Symfony/Component/EventDispatcher/Tests/GenericEventTest.php b/src/Symfony/Component/EventDispatcher/Tests/GenericEventTest.php
index aebd82dabdf4..bbb459fb3494 100644
--- a/src/Symfony/Component/EventDispatcher/Tests/GenericEventTest.php
+++ b/src/Symfony/Component/EventDispatcher/Tests/GenericEventTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\EventDispatcher\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\EventDispatcher\GenericEvent;
 
 /**
  * Test class for Event.
  */
-class GenericEventTest extends \PHPUnit_Framework_TestCase
+class GenericEventTest extends TestCase
 {
     /**
      * @var GenericEvent
diff --git a/src/Symfony/Component/EventDispatcher/Tests/ImmutableEventDispatcherTest.php b/src/Symfony/Component/EventDispatcher/Tests/ImmutableEventDispatcherTest.php
index 0f8868037d15..04f2861e3319 100644
--- a/src/Symfony/Component/EventDispatcher/Tests/ImmutableEventDispatcherTest.php
+++ b/src/Symfony/Component/EventDispatcher/Tests/ImmutableEventDispatcherTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\EventDispatcher\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\EventDispatcher\Event;
 use Symfony\Component\EventDispatcher\ImmutableEventDispatcher;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class ImmutableEventDispatcherTest extends \PHPUnit_Framework_TestCase
+class ImmutableEventDispatcherTest extends TestCase
 {
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php
index d2e60bd64905..fa8d1f4b6457 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\ExpressionLanguage\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
 use Symfony\Component\ExpressionLanguage\Tests\Fixtures\TestProvider;
 
-class ExpressionLanguageTest extends \PHPUnit_Framework_TestCase
+class ExpressionLanguageTest extends TestCase
 {
     public function testCachedParse()
     {
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionTest.php
index f28c6a942397..052ef2201a32 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\ExpressionLanguage\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ExpressionLanguage\Expression;
 
-class ExpressionTest extends \PHPUnit_Framework_TestCase
+class ExpressionTest extends TestCase
 {
     public function testSerialization()
     {
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php
index 8af5c1c10175..4292c2235969 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\ExpressionLanguage\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ExpressionLanguage\Lexer;
 use Symfony\Component\ExpressionLanguage\Token;
 use Symfony\Component\ExpressionLanguage\TokenStream;
 
-class LexerTest extends \PHPUnit_Framework_TestCase
+class LexerTest extends TestCase
 {
     /**
      * @dataProvider getTokenizeData
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/AbstractNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/AbstractNodeTest.php
index 58b0e177e8e1..550fea976fab 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/AbstractNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/AbstractNodeTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\ExpressionLanguage\Tests\Node;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ExpressionLanguage\Compiler;
 
-abstract class AbstractNodeTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractNodeTest extends TestCase
 {
     /**
      * @dataProvider getEvaluateData
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/NodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/NodeTest.php
index 6901329a5e71..0f35b5febe8e 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/NodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/NodeTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\ExpressionLanguage\Tests\Node;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ExpressionLanguage\Node\Node;
 use Symfony\Component\ExpressionLanguage\Node\ConstantNode;
 
-class NodeTest extends \PHPUnit_Framework_TestCase
+class NodeTest extends TestCase
 {
     public function testToString()
     {
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/ParsedExpressionTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/ParsedExpressionTest.php
index 18bde0210eab..d28101fb6fe0 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/ParsedExpressionTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/ParsedExpressionTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\ExpressionLanguage\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ExpressionLanguage\Node\ConstantNode;
 use Symfony\Component\ExpressionLanguage\ParsedExpression;
 
-class ParsedExpressionTest extends \PHPUnit_Framework_TestCase
+class ParsedExpressionTest extends TestCase
 {
     public function testSerialization()
     {
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/ParserTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/ParserTest.php
index dd850dd36003..8996d5bfa023 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/ParserTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/ParserTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\ExpressionLanguage\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ExpressionLanguage\Parser;
 use Symfony\Component\ExpressionLanguage\Lexer;
 use Symfony\Component\ExpressionLanguage\Node;
 
-class ParserTest extends \PHPUnit_Framework_TestCase
+class ParserTest extends TestCase
 {
     /**
      * @expectedException        \Symfony\Component\ExpressionLanguage\SyntaxError
diff --git a/src/Symfony/Component/Filesystem/Tests/ExceptionTest.php b/src/Symfony/Component/Filesystem/Tests/ExceptionTest.php
index 53bd8db76a00..5a04e0409048 100644
--- a/src/Symfony/Component/Filesystem/Tests/ExceptionTest.php
+++ b/src/Symfony/Component/Filesystem/Tests/ExceptionTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Filesystem\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Filesystem\Exception\IOException;
 use Symfony\Component\Filesystem\Exception\FileNotFoundException;
 
 /**
  * Test class for Filesystem.
  */
-class ExceptionTest extends \PHPUnit_Framework_TestCase
+class ExceptionTest extends TestCase
 {
     public function testGetPath()
     {
diff --git a/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php b/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php
index 63d8b8fc9023..5586a00547a6 100644
--- a/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php
+++ b/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Filesystem\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Filesystem\Filesystem;
 
-class FilesystemTestCase extends \PHPUnit_Framework_TestCase
+class FilesystemTestCase extends TestCase
 {
     private $umask;
 
diff --git a/src/Symfony/Component/Filesystem/Tests/LockHandlerTest.php b/src/Symfony/Component/Filesystem/Tests/LockHandlerTest.php
index c7509f61e686..1fc2ebc0c1e6 100644
--- a/src/Symfony/Component/Filesystem/Tests/LockHandlerTest.php
+++ b/src/Symfony/Component/Filesystem/Tests/LockHandlerTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Filesystem\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Filesystem\LockHandler;
 
-class LockHandlerTest extends \PHPUnit_Framework_TestCase
+class LockHandlerTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Filesystem\Exception\IOException
diff --git a/src/Symfony/Component/Finder/Tests/Comparator/ComparatorTest.php b/src/Symfony/Component/Finder/Tests/Comparator/ComparatorTest.php
index bf5984414f65..656fc57a4bc4 100644
--- a/src/Symfony/Component/Finder/Tests/Comparator/ComparatorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Comparator/ComparatorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Finder\Tests\Comparator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Comparator\Comparator;
 
-class ComparatorTest extends \PHPUnit_Framework_TestCase
+class ComparatorTest extends TestCase
 {
     public function testGetSetOperator()
     {
diff --git a/src/Symfony/Component/Finder/Tests/Comparator/DateComparatorTest.php b/src/Symfony/Component/Finder/Tests/Comparator/DateComparatorTest.php
index 273912635e33..8a6c1ddfd19e 100644
--- a/src/Symfony/Component/Finder/Tests/Comparator/DateComparatorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Comparator/DateComparatorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Finder\Tests\Comparator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Comparator\DateComparator;
 
-class DateComparatorTest extends \PHPUnit_Framework_TestCase
+class DateComparatorTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Finder/Tests/Comparator/NumberComparatorTest.php b/src/Symfony/Component/Finder/Tests/Comparator/NumberComparatorTest.php
index 8284d078a851..30a75c738c5a 100644
--- a/src/Symfony/Component/Finder/Tests/Comparator/NumberComparatorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Comparator/NumberComparatorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Finder\Tests\Comparator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Comparator\NumberComparator;
 
-class NumberComparatorTest extends \PHPUnit_Framework_TestCase
+class NumberComparatorTest extends TestCase
 {
     /**
      * @dataProvider getConstructorTestData
diff --git a/src/Symfony/Component/Finder/Tests/Expression/ExpressionTest.php b/src/Symfony/Component/Finder/Tests/Expression/ExpressionTest.php
index 4254a453a0c0..f551c9bdacee 100644
--- a/src/Symfony/Component/Finder/Tests/Expression/ExpressionTest.php
+++ b/src/Symfony/Component/Finder/Tests/Expression/ExpressionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Finder\Tests\Expression;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Expression\Expression;
 
-class ExpressionTest extends \PHPUnit_Framework_TestCase
+class ExpressionTest extends TestCase
 {
     /**
      * @dataProvider getTypeGuesserData
diff --git a/src/Symfony/Component/Finder/Tests/Expression/GlobTest.php b/src/Symfony/Component/Finder/Tests/Expression/GlobTest.php
index 9d4c3e571cf1..acac5cc33c58 100644
--- a/src/Symfony/Component/Finder/Tests/Expression/GlobTest.php
+++ b/src/Symfony/Component/Finder/Tests/Expression/GlobTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Finder\Tests\Expression;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Expression\Expression;
 
-class GlobTest extends \PHPUnit_Framework_TestCase
+class GlobTest extends TestCase
 {
     /**
      * @dataProvider getToRegexData
diff --git a/src/Symfony/Component/Finder/Tests/Expression/RegexTest.php b/src/Symfony/Component/Finder/Tests/Expression/RegexTest.php
index 620ba1003e72..c1342f7ab539 100644
--- a/src/Symfony/Component/Finder/Tests/Expression/RegexTest.php
+++ b/src/Symfony/Component/Finder/Tests/Expression/RegexTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Finder\Tests\Expression;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Expression\Expression;
 
-class RegexTest extends \PHPUnit_Framework_TestCase
+class RegexTest extends TestCase
 {
     /**
      * @dataProvider getHasFlagsData
diff --git a/src/Symfony/Component/Finder/Tests/GlobTest.php b/src/Symfony/Component/Finder/Tests/GlobTest.php
index dd73e257ba82..b81151e1e478 100755
--- a/src/Symfony/Component/Finder/Tests/GlobTest.php
+++ b/src/Symfony/Component/Finder/Tests/GlobTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Finder\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Glob;
 
-class GlobTest extends \PHPUnit_Framework_TestCase
+class GlobTest extends TestCase
 {
     public function testGlobToRegexDelimiters()
     {
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php b/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php
index 2d29efedf1c2..c724a75c692d 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Finder\Tests\Iterator;
 
-abstract class IteratorTestCase extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+abstract class IteratorTestCase extends TestCase
 {
     protected function assertIterator($expected, \Traversable $iterator)
     {
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/MultiplePcreFilterIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/MultiplePcreFilterIteratorTest.php
index 89d8edb0093b..99923a5eb256 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/MultiplePcreFilterIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/MultiplePcreFilterIteratorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Finder\Tests\Iterator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Iterator\MultiplePcreFilterIterator;
 
-class MultiplePcreFilterIteratorTest extends \PHPUnit_Framework_TestCase
+class MultiplePcreFilterIteratorTest extends TestCase
 {
     /**
      * @dataProvider getIsRegexFixtures
diff --git a/src/Symfony/Component/Finder/Tests/Shell/CommandTest.php b/src/Symfony/Component/Finder/Tests/Shell/CommandTest.php
index d45ea9d23825..c78e76169266 100644
--- a/src/Symfony/Component/Finder/Tests/Shell/CommandTest.php
+++ b/src/Symfony/Component/Finder/Tests/Shell/CommandTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Finder\Tests\Shell;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Shell\Command;
 
-class CommandTest extends \PHPUnit_Framework_TestCase
+class CommandTest extends TestCase
 {
     public function testCreate()
     {
diff --git a/src/Symfony/Component/Form/Test/FormIntegrationTestCase.php b/src/Symfony/Component/Form/Test/FormIntegrationTestCase.php
index caab26970ce4..a5c0b23384d9 100644
--- a/src/Symfony/Component/Form/Test/FormIntegrationTestCase.php
+++ b/src/Symfony/Component/Form/Test/FormIntegrationTestCase.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Form\Test;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Forms;
 use Symfony\Component\Form\FormFactoryInterface;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-abstract class FormIntegrationTestCase extends \PHPUnit_Framework_TestCase
+abstract class FormIntegrationTestCase extends TestCase
 {
     /**
      * @var FormFactoryInterface
diff --git a/src/Symfony/Component/Form/Tests/AbstractExtensionTest.php b/src/Symfony/Component/Form/Tests/AbstractExtensionTest.php
index b1534db3abc8..0d53365625af 100644
--- a/src/Symfony/Component/Form/Tests/AbstractExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractExtensionTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\AbstractExtension;
 use Symfony\Component\Form\Tests\Fixtures\FooType;
 
-class AbstractExtensionTest extends \PHPUnit_Framework_TestCase
+class AbstractExtensionTest extends TestCase
 {
     public function testHasType()
     {
diff --git a/src/Symfony/Component/Form/Tests/AbstractFormTest.php b/src/Symfony/Component/Form/Tests/AbstractFormTest.php
index ba8b574751c7..fb10318ebf57 100644
--- a/src/Symfony/Component/Form/Tests/AbstractFormTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractFormTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\FormBuilder;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 
-abstract class AbstractFormTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractFormTest extends TestCase
 {
     /**
      * @var EventDispatcherInterface
diff --git a/src/Symfony/Component/Form/Tests/AbstractRequestHandlerTest.php b/src/Symfony/Component/Form/Tests/AbstractRequestHandlerTest.php
index 93f6d7fb2259..0ef713da1745 100644
--- a/src/Symfony/Component/Form/Tests/AbstractRequestHandlerTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractRequestHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\FormError;
 use Symfony\Component\Form\FormFactory;
 use Symfony\Component\Form\Forms;
@@ -19,7 +20,7 @@
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-abstract class AbstractRequestHandlerTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractRequestHandlerTest extends TestCase
 {
     /**
      * @var RequestHandlerInterface
diff --git a/src/Symfony/Component/Form/Tests/ButtonBuilderTest.php b/src/Symfony/Component/Form/Tests/ButtonBuilderTest.php
index dc5d38b74486..5b2b2659a33c 100644
--- a/src/Symfony/Component/Form/Tests/ButtonBuilderTest.php
+++ b/src/Symfony/Component/Form/Tests/ButtonBuilderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ButtonBuilder;
 
 /**
  * @author Alexander Cheprasov <cheprasov.84@ya.ru>
  */
-class ButtonBuilderTest extends \PHPUnit_Framework_TestCase
+class ButtonBuilderTest extends TestCase
 {
     public function getValidNames()
     {
diff --git a/src/Symfony/Component/Form/Tests/ButtonTest.php b/src/Symfony/Component/Form/Tests/ButtonTest.php
index 5fa2fa136874..08d2d74e65b3 100644
--- a/src/Symfony/Component/Form/Tests/ButtonTest.php
+++ b/src/Symfony/Component/Form/Tests/ButtonTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ButtonBuilder;
 use Symfony\Component\Form\FormBuilder;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class ButtonTest extends \PHPUnit_Framework_TestCase
+class ButtonTest extends TestCase
 {
     private $dispatcher;
 
diff --git a/src/Symfony/Component/Form/Tests/CallbackTransformerTest.php b/src/Symfony/Component/Form/Tests/CallbackTransformerTest.php
index af49e69e6c1e..396e3d91df40 100644
--- a/src/Symfony/Component/Form/Tests/CallbackTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/CallbackTransformerTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\CallbackTransformer;
 
-class CallbackTransformerTest extends \PHPUnit_Framework_TestCase
+class CallbackTransformerTest extends TestCase
 {
     public function testTransform()
     {
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/AbstractChoiceListTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/AbstractChoiceListTest.php
index 08e4285f0cd5..fc25cffc1fc2 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/AbstractChoiceListTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/AbstractChoiceListTest.php
@@ -11,10 +11,12 @@
 
 namespace Symfony\Component\Form\Tests\ChoiceList;
 
+use PHPUnit\Framework\TestCase;
+
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-abstract class AbstractChoiceListTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractChoiceListTest extends TestCase
 {
     /**
      * @var \Symfony\Component\Form\ChoiceList\ChoiceListInterface
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
index 251a1dfb5844..257aba96903e 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Form\Tests\ChoiceList\Factory;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ChoiceList\Factory\CachingFactoryDecorator;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class CachingFactoryDecoratorTest extends \PHPUnit_Framework_TestCase
+class CachingFactoryDecoratorTest extends TestCase
 {
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/DefaultChoiceListFactoryTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/DefaultChoiceListFactoryTest.php
index ac6f5d5c719b..0e281a8e8605 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/DefaultChoiceListFactoryTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/DefaultChoiceListFactoryTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests\ChoiceList\Factory;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ChoiceList\ArrayChoiceList;
 use Symfony\Component\Form\ChoiceList\ChoiceListInterface;
 use Symfony\Component\Form\ChoiceList\Factory\DefaultChoiceListFactory;
@@ -21,7 +22,7 @@
 use Symfony\Component\Form\ChoiceList\View\ChoiceView;
 use Symfony\Component\Form\Extension\Core\View\ChoiceView as LegacyChoiceView;
 
-class DefaultChoiceListFactoryTest extends \PHPUnit_Framework_TestCase
+class DefaultChoiceListFactoryTest extends TestCase
 {
     private $obj1;
 
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/PropertyAccessDecoratorTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/PropertyAccessDecoratorTest.php
index 5dc192c3f24b..c9fbb5cbd9eb 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/PropertyAccessDecoratorTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/PropertyAccessDecoratorTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Form\Tests\ChoiceList\Factory;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ChoiceList\Factory\PropertyAccessDecorator;
 use Symfony\Component\PropertyAccess\PropertyPath;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class PropertyAccessDecoratorTest extends \PHPUnit_Framework_TestCase
+class PropertyAccessDecoratorTest extends TestCase
 {
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/LazyChoiceListTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/LazyChoiceListTest.php
index 3aae8e683d77..3f6742c4486a 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/LazyChoiceListTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/LazyChoiceListTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Form\Tests\ChoiceList;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ChoiceList\LazyChoiceList;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class LazyChoiceListTest extends \PHPUnit_Framework_TestCase
+class LazyChoiceListTest extends TestCase
 {
     /**
      * @var LazyChoiceList
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/LegacyChoiceListAdapterTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/LegacyChoiceListAdapterTest.php
index 32f07294243c..363960fdf158 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/LegacyChoiceListAdapterTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/LegacyChoiceListAdapterTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests\ChoiceList;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ChoiceList\LegacyChoiceListAdapter;
 use Symfony\Component\Form\Extension\Core\ChoiceList\ChoiceListInterface;
 
@@ -18,7 +19,7 @@
  * @author Bernhard Schussek <bschussek@gmail.com>
  * @group legacy
  */
-class LegacyChoiceListAdapterTest extends \PHPUnit_Framework_TestCase
+class LegacyChoiceListAdapterTest extends TestCase
 {
     /**
      * @var LegacyChoiceListAdapter
diff --git a/src/Symfony/Component/Form/Tests/CompoundFormTest.php b/src/Symfony/Component/Form/Tests/CompoundFormTest.php
index de6db05ab15c..3738a4c953c0 100644
--- a/src/Symfony/Component/Form/Tests/CompoundFormTest.php
+++ b/src/Symfony/Component/Form/Tests/CompoundFormTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Core\DataMapper\PropertyPathMapper;
 use Symfony\Component\Form\Extension\HttpFoundation\HttpFoundationRequestHandler;
 use Symfony\Component\Form\FormError;
@@ -945,7 +946,7 @@ public function testCreateViewWithChildren()
 
         $assertChildViewsEqual = function (array $childViews) use ($test) {
             return function (FormView $view) use ($test, $childViews) {
-                /* @var \PHPUnit_Framework_TestCase $test */
+                /* @var TestCase $test */
                 $test->assertSame($childViews, $view->children);
             };
         };
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/ChoiceList/AbstractChoiceListTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/ChoiceList/AbstractChoiceListTest.php
index a17d672f6267..090580ec735b 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/ChoiceList/AbstractChoiceListTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/ChoiceList/AbstractChoiceListTest.php
@@ -11,12 +11,14 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\ChoiceList;
 
+use PHPUnit\Framework\TestCase;
+
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  *
  * @group legacy
  */
-abstract class AbstractChoiceListTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractChoiceListTest extends TestCase
 {
     /**
      * @var \Symfony\Component\Form\Extension\Core\ChoiceList\ChoiceListInterface
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/ChoiceList/LazyChoiceListTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/ChoiceList/LazyChoiceListTest.php
index 5504d8df7371..5dd53b4e2574 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/ChoiceList/LazyChoiceListTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/ChoiceList/LazyChoiceListTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\ChoiceList;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Core\ChoiceList\SimpleChoiceList;
 use Symfony\Component\Form\Extension\Core\View\ChoiceView;
 use Symfony\Component\Form\Tests\Extension\Core\ChoiceList\Fixtures\LazyChoiceListImpl;
@@ -19,7 +20,7 @@
 /**
  * @group legacy
  */
-class LazyChoiceListTest extends \PHPUnit_Framework_TestCase
+class LazyChoiceListTest extends TestCase
 {
     /**
      * @var LazyChoiceListImpl
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataMapper/PropertyPathMapperTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataMapper/PropertyPathMapperTest.php
index 3385c05dc4be..32886e565129 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataMapper/PropertyPathMapperTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataMapper/PropertyPathMapperTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataMapper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\FormConfigBuilder;
 use Symfony\Component\Form\FormConfigInterface;
 use Symfony\Component\Form\Extension\Core\DataMapper\PropertyPathMapper;
 
-class PropertyPathMapperTest extends \PHPUnit_Framework_TestCase
+class PropertyPathMapperTest extends TestCase
 {
     /**
      * @var PropertyPathMapper
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ArrayToPartsTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ArrayToPartsTransformerTest.php
index 33779260ae10..220a36765521 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ArrayToPartsTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ArrayToPartsTransformerTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Core\DataTransformer\ArrayToPartsTransformer;
 
-class ArrayToPartsTransformerTest extends \PHPUnit_Framework_TestCase
+class ArrayToPartsTransformerTest extends TestCase
 {
     private $transformer;
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BaseDateTimeTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BaseDateTimeTransformerTest.php
index ac61acc4e64f..385accd7f369 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BaseDateTimeTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BaseDateTimeTransformerTest.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
-class BaseDateTimeTransformerTest extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class BaseDateTimeTransformerTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Form\Exception\InvalidArgumentException
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BooleanToStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BooleanToStringTransformerTest.php
index a1217783d17e..5195092e18b8 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BooleanToStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BooleanToStringTransformerTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Core\DataTransformer\BooleanToStringTransformer;
 
-class BooleanToStringTransformerTest extends \PHPUnit_Framework_TestCase
+class BooleanToStringTransformerTest extends TestCase
 {
     const TRUE_VALUE = '1';
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoiceToValueTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoiceToValueTransformerTest.php
index 5362ab9fc76c..cf5dbaa6af7d 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoiceToValueTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoiceToValueTransformerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ChoiceList\ArrayChoiceList;
 use Symfony\Component\Form\Extension\Core\DataTransformer\ChoiceToValueTransformer;
 
-class ChoiceToValueTransformerTest extends \PHPUnit_Framework_TestCase
+class ChoiceToValueTransformerTest extends TestCase
 {
     protected $transformer;
     protected $transformerWithNull;
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoicesToValuesTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoicesToValuesTransformerTest.php
index 5eb01a2ccb63..aa4936f82263 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoicesToValuesTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoicesToValuesTransformerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ChoiceList\ArrayChoiceList;
 use Symfony\Component\Form\Extension\Core\DataTransformer\ChoicesToValuesTransformer;
 
-class ChoicesToValuesTransformerTest extends \PHPUnit_Framework_TestCase
+class ChoicesToValuesTransformerTest extends TestCase
 {
     protected $transformer;
     protected $transformerWithNull;
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DataTransformerChainTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DataTransformerChainTest.php
index 9ec553db4bd7..fc9f85e3c752 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DataTransformerChainTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DataTransformerChainTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Core\DataTransformer\DataTransformerChain;
 
-class DataTransformerChainTest extends \PHPUnit_Framework_TestCase
+class DataTransformerChainTest extends TestCase
 {
     public function testTransform()
     {
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeTestCase.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeTestCase.php
index 200cbc32824f..c6d1a07cd780 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeTestCase.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeTestCase.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
-abstract class DateTimeTestCase extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+abstract class DateTimeTestCase extends TestCase
 {
     public static function assertDateTimeEquals(\DateTime $expected, \DateTime $actual)
     {
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/IntegerToLocalizedStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/IntegerToLocalizedStringTransformerTest.php
index af6443ac8405..fe1f7d31792f 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/IntegerToLocalizedStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/IntegerToLocalizedStringTransformerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Core\DataTransformer\IntegerToLocalizedStringTransformer;
 use Symfony\Component\Intl\Util\IntlTestHelper;
 
-class IntegerToLocalizedStringTransformerTest extends \PHPUnit_Framework_TestCase
+class IntegerToLocalizedStringTransformerTest extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/MoneyToLocalizedStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/MoneyToLocalizedStringTransformerTest.php
index 0fa2df05641a..5a3417e4d203 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/MoneyToLocalizedStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/MoneyToLocalizedStringTransformerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Core\DataTransformer\MoneyToLocalizedStringTransformer;
 use Symfony\Component\Intl\Util\IntlTestHelper;
 
-class MoneyToLocalizedStringTransformerTest extends \PHPUnit_Framework_TestCase
+class MoneyToLocalizedStringTransformerTest extends TestCase
 {
     public function testTransform()
     {
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
index c619ca729fdf..0789e414bd1f 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Core\DataTransformer\NumberToLocalizedStringTransformer;
 use Symfony\Component\Intl\Util\IntlTestHelper;
 
-class NumberToLocalizedStringTransformerTest extends \PHPUnit_Framework_TestCase
+class NumberToLocalizedStringTransformerTest extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/PercentToLocalizedStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/PercentToLocalizedStringTransformerTest.php
index c0447656f3e5..93fe38def89f 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/PercentToLocalizedStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/PercentToLocalizedStringTransformerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Core\DataTransformer\PercentToLocalizedStringTransformer;
 use Symfony\Component\Intl\Util\IntlTestHelper;
 
-class PercentToLocalizedStringTransformerTest extends \PHPUnit_Framework_TestCase
+class PercentToLocalizedStringTransformerTest extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php
index eb3cf9704bc2..5c1d56264ed8 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\DataTransformer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Core\DataTransformer\ValueToDuplicatesTransformer;
 
-class ValueToDuplicatesTransformerTest extends \PHPUnit_Framework_TestCase
+class ValueToDuplicatesTransformerTest extends TestCase
 {
     private $transformer;
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixRadioInputListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixRadioInputListenerTest.php
index 65cc25539483..2772e47660ef 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixRadioInputListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixRadioInputListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ChoiceList\ArrayKeyChoiceList;
 use Symfony\Component\Form\FormEvent;
 use Symfony\Component\Form\Extension\Core\EventListener\FixRadioInputListener;
@@ -18,7 +19,7 @@
 /**
  * @group legacy
  */
-class FixRadioInputListenerTest extends \PHPUnit_Framework_TestCase
+class FixRadioInputListenerTest extends TestCase
 {
     private $choiceList;
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixUrlProtocolListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixUrlProtocolListenerTest.php
index d31de3cadab6..e3fd9523d96d 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixUrlProtocolListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixUrlProtocolListenerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\FormEvent;
 use Symfony\Component\Form\Extension\Core\EventListener\FixUrlProtocolListener;
 
-class FixUrlProtocolListenerTest extends \PHPUnit_Framework_TestCase
+class FixUrlProtocolListenerTest extends TestCase
 {
     public function testFixHttpUrl()
     {
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php
index ddd46819a4f0..2dcbc359eab9 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\FormEvent;
 use Symfony\Component\Form\Extension\Core\EventListener\MergeCollectionListener;
 
-abstract class MergeCollectionListenerTest extends \PHPUnit_Framework_TestCase
+abstract class MergeCollectionListenerTest extends TestCase
 {
     protected $dispatcher;
     protected $factory;
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/ResizeFormListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/ResizeFormListenerTest.php
index 52afec76013e..281581bcffc1 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/ResizeFormListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/ResizeFormListenerTest.php
@@ -12,11 +12,12 @@
 namespace Symfony\Component\Form\Tests\Extension\Core\EventListener;
 
 use Doctrine\Common\Collections\ArrayCollection;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Core\EventListener\ResizeFormListener;
 use Symfony\Component\Form\FormBuilder;
 use Symfony\Component\Form\FormEvent;
 
-class ResizeFormListenerTest extends \PHPUnit_Framework_TestCase
+class ResizeFormListenerTest extends TestCase
 {
     private $dispatcher;
     private $factory;
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/TrimListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/TrimListenerTest.php
index a6b111e78e63..d1ea3331a943 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/TrimListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/TrimListenerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Core\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\FormEvent;
 use Symfony\Component\Form\Extension\Core\EventListener\TrimListener;
 
-class TrimListenerTest extends \PHPUnit_Framework_TestCase
+class TrimListenerTest extends TestCase
 {
     public function testTrim()
     {
diff --git a/src/Symfony/Component/Form/Tests/Extension/Csrf/CsrfProvider/LegacyDefaultCsrfProviderTest.php b/src/Symfony/Component/Form/Tests/Extension/Csrf/CsrfProvider/LegacyDefaultCsrfProviderTest.php
index 29e370df096f..824e81c55303 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Csrf/CsrfProvider/LegacyDefaultCsrfProviderTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Csrf/CsrfProvider/LegacyDefaultCsrfProviderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Csrf\CsrfProvider;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Csrf\CsrfProvider\DefaultCsrfProvider;
 
 /**
@@ -18,7 +19,7 @@
  * @preserveGlobalState disabled
  * @group legacy
  */
-class LegacyDefaultCsrfProviderTest extends \PHPUnit_Framework_TestCase
+class LegacyDefaultCsrfProviderTest extends TestCase
 {
     protected $provider;
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Csrf/CsrfProvider/LegacySessionCsrfProviderTest.php b/src/Symfony/Component/Form/Tests/Extension/Csrf/CsrfProvider/LegacySessionCsrfProviderTest.php
index 43918643b617..bd87d9cc8c57 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Csrf/CsrfProvider/LegacySessionCsrfProviderTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Csrf/CsrfProvider/LegacySessionCsrfProviderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Csrf\CsrfProvider;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Csrf\CsrfProvider\SessionCsrfProvider;
 
 /**
  * @group legacy
  */
-class LegacySessionCsrfProviderTest extends \PHPUnit_Framework_TestCase
+class LegacySessionCsrfProviderTest extends TestCase
 {
     protected $provider;
     protected $session;
diff --git a/src/Symfony/Component/Form/Tests/Extension/Csrf/EventListener/CsrfValidationListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Csrf/EventListener/CsrfValidationListenerTest.php
index 356d1c808c1c..fc0dee140b04 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Csrf/EventListener/CsrfValidationListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Csrf/EventListener/CsrfValidationListenerTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Csrf\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Form;
 use Symfony\Component\Form\FormBuilder;
 use Symfony\Component\Form\FormEvent;
 use Symfony\Component\Form\Extension\Csrf\EventListener\CsrfValidationListener;
 
-class CsrfValidationListenerTest extends \PHPUnit_Framework_TestCase
+class CsrfValidationListenerTest extends TestCase
 {
     protected $dispatcher;
     protected $factory;
diff --git a/src/Symfony/Component/Form/Tests/Extension/DataCollector/DataCollectorExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/DataCollector/DataCollectorExtensionTest.php
index 993d818d5b62..6a551bb2fcb9 100644
--- a/src/Symfony/Component/Form/Tests/Extension/DataCollector/DataCollectorExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/DataCollector/DataCollectorExtensionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Form\Tests\Extension\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\DataCollector\DataCollectorExtension;
 
-class DataCollectorExtensionTest extends \PHPUnit_Framework_TestCase
+class DataCollectorExtensionTest extends TestCase
 {
     /**
      * @var DataCollectorExtension
diff --git a/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataCollectorTest.php b/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataCollectorTest.php
index f76b19e4b6ef..a004f77704c3 100644
--- a/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataCollectorTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataCollectorTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Form\Tests\Extension\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\DataCollector\FormDataCollector;
 use Symfony\Component\Form\Form;
 use Symfony\Component\Form\FormBuilder;
 use Symfony\Component\Form\FormView;
 
-class FormDataCollectorTest extends \PHPUnit_Framework_TestCase
+class FormDataCollectorTest extends TestCase
 {
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
diff --git a/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php b/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php
index ac74746cd83e..9e0b5f57e647 100644
--- a/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests\Extension\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\CallbackTransformer;
 use Symfony\Component\Form\Exception\TransformationFailedException;
 use Symfony\Component\Form\Extension\DataCollector\FormDataExtractor;
@@ -34,7 +35,7 @@ public function exportValue($value, $depth = 1, $deep = false)
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class FormDataExtractorTest extends \PHPUnit_Framework_TestCase
+class FormDataExtractorTest extends TestCase
 {
     /**
      * @var FormDataExtractorTest_SimpleValueExporter
diff --git a/src/Symfony/Component/Form/Tests/Extension/DataCollector/Type/DataCollectorTypeExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/DataCollector/Type/DataCollectorTypeExtensionTest.php
index 4131a46cee05..c19b1153be2b 100644
--- a/src/Symfony/Component/Form/Tests/Extension/DataCollector/Type/DataCollectorTypeExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/DataCollector/Type/DataCollectorTypeExtensionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Form\Tests\Extension\DataCollector\Type;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\DataCollector\Type\DataCollectorTypeExtension;
 
-class DataCollectorTypeExtensionTest extends \PHPUnit_Framework_TestCase
+class DataCollectorTypeExtensionTest extends TestCase
 {
     /**
      * @var DataCollectorTypeExtension
diff --git a/src/Symfony/Component/Form/Tests/Extension/HttpFoundation/EventListener/LegacyBindRequestListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/HttpFoundation/EventListener/LegacyBindRequestListenerTest.php
index f84220c78c9d..a05847e0bc20 100644
--- a/src/Symfony/Component/Form/Tests/Extension/HttpFoundation/EventListener/LegacyBindRequestListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/HttpFoundation/EventListener/LegacyBindRequestListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests\Extension\HttpFoundation\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\HttpFoundation\EventListener\BindRequestListener;
 use Symfony\Component\Form\Form;
 use Symfony\Component\Form\FormConfigBuilder;
@@ -22,7 +23,7 @@
  * @author Bernhard Schussek <bschussek@gmail.com>
  * @group legacy
  */
-class LegacyBindRequestListenerTest extends \PHPUnit_Framework_TestCase
+class LegacyBindRequestListenerTest extends TestCase
 {
     private $values;
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/EventListener/ValidationListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/EventListener/ValidationListenerTest.php
index 72a9bdfffc71..46e540ee4c19 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/EventListener/ValidationListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/EventListener/ValidationListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Validator\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\FormBuilder;
 use Symfony\Component\Form\FormEvent;
 use Symfony\Component\Form\Extension\Validator\Constraints\Form;
@@ -19,7 +20,7 @@
 use Symfony\Component\Validator\ConstraintViolation;
 use Symfony\Component\Validator\ConstraintViolationList;
 
-class ValidationListenerTest extends \PHPUnit_Framework_TestCase
+class ValidationListenerTest extends TestCase
 {
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/Util/ServerParamsTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/Util/ServerParamsTest.php
index 3627f4b9e6c6..c3ee7303efa1 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/Util/ServerParamsTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/Util/ServerParamsTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Validator\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Validator\Util\ServerParams;
 use Symfony\Component\HttpFoundation\Request;
 
-class ServerParamsTest extends \PHPUnit_Framework_TestCase
+class ServerParamsTest extends TestCase
 {
     public function testGetContentLengthFromSuperglobals()
     {
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorExtensionTest.php
index 5a41f928ca52..39e6ae562d95 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorExtensionTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Validator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Validator\ValidatorExtension;
 use Symfony\Component\Validator\ValidatorInterface;
 
-class ValidatorExtensionTest extends \PHPUnit_Framework_TestCase
+class ValidatorExtensionTest extends TestCase
 {
     public function test2Dot5ValidationApi()
     {
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorTypeGuesserTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorTypeGuesserTest.php
index a5e49d5e6376..6ddac337afea 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorTypeGuesserTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorTypeGuesserTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Validator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Validator\ValidatorTypeGuesser;
 use Symfony\Component\Form\Guess\Guess;
 use Symfony\Component\Form\Guess\ValueGuess;
@@ -27,7 +28,7 @@
  * @author franek <franek@chicour.net>
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class ValidatorTypeGuesserTest extends \PHPUnit_Framework_TestCase
+class ValidatorTypeGuesserTest extends TestCase
 {
     const TEST_CLASS = 'Symfony\Component\Form\Tests\Extension\Validator\ValidatorTypeGuesserTest_TestClass';
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php
index 314a645dbcc3..dd70b23bda0d 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Validator\ViolationMapper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Validator\ViolationMapper\ViolationMapper;
 use Symfony\Component\Form\Exception\TransformationFailedException;
 use Symfony\Component\Form\CallbackTransformer;
@@ -25,7 +26,7 @@
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class ViolationMapperTest extends \PHPUnit_Framework_TestCase
+class ViolationMapperTest extends TestCase
 {
     const LEVEL_0 = 0;
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php
index fdbf747f2033..31377dec3e58 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Form\Tests\Extension\Validator\ViolationMapper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Extension\Validator\ViolationMapper\ViolationPath;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class ViolationPathTest extends \PHPUnit_Framework_TestCase
+class ViolationPathTest extends TestCase
 {
     public function providePaths()
     {
diff --git a/src/Symfony/Component/Form/Tests/FormBuilderTest.php b/src/Symfony/Component/Form/Tests/FormBuilderTest.php
index e0edf5d89f7b..214313cba1b5 100644
--- a/src/Symfony/Component/Form/Tests/FormBuilderTest.php
+++ b/src/Symfony/Component/Form/Tests/FormBuilderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ButtonBuilder;
 use Symfony\Component\Form\FormBuilder;
 use Symfony\Component\Form\SubmitButtonBuilder;
 
-class FormBuilderTest extends \PHPUnit_Framework_TestCase
+class FormBuilderTest extends TestCase
 {
     private $dispatcher;
     private $factory;
diff --git a/src/Symfony/Component/Form/Tests/FormConfigTest.php b/src/Symfony/Component/Form/Tests/FormConfigTest.php
index 1bfaf4d0e0bd..21eabba871d3 100644
--- a/src/Symfony/Component/Form/Tests/FormConfigTest.php
+++ b/src/Symfony/Component/Form/Tests/FormConfigTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Exception\UnexpectedTypeException;
 use Symfony\Component\Form\FormConfigBuilder;
 use Symfony\Component\Form\Exception\InvalidArgumentException;
@@ -18,7 +19,7 @@
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class FormConfigTest extends \PHPUnit_Framework_TestCase
+class FormConfigTest extends TestCase
 {
     public function getHtml4Ids()
     {
diff --git a/src/Symfony/Component/Form/Tests/FormFactoryBuilderTest.php b/src/Symfony/Component/Form/Tests/FormFactoryBuilderTest.php
index e41a8085b520..e08ac98c3f92 100644
--- a/src/Symfony/Component/Form/Tests/FormFactoryBuilderTest.php
+++ b/src/Symfony/Component/Form/Tests/FormFactoryBuilderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\FormFactoryBuilder;
 use Symfony\Component\Form\Tests\Fixtures\FooType;
 
-class FormFactoryBuilderTest extends \PHPUnit_Framework_TestCase
+class FormFactoryBuilderTest extends TestCase
 {
     private $registry;
     private $guesser;
diff --git a/src/Symfony/Component/Form/Tests/FormFactoryTest.php b/src/Symfony/Component/Form/Tests/FormFactoryTest.php
index 41de2d95a6a8..4185a4a0025d 100644
--- a/src/Symfony/Component/Form/Tests/FormFactoryTest.php
+++ b/src/Symfony/Component/Form/Tests/FormFactoryTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\FormTypeGuesserChain;
 use Symfony\Component\Form\FormFactory;
 use Symfony\Component\Form\Guess\Guess;
@@ -23,7 +24,7 @@
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class FormFactoryTest extends \PHPUnit_Framework_TestCase
+class FormFactoryTest extends TestCase
 {
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
diff --git a/src/Symfony/Component/Form/Tests/FormRegistryTest.php b/src/Symfony/Component/Form/Tests/FormRegistryTest.php
index 3d6864b09e88..d34d14a956dc 100644
--- a/src/Symfony/Component/Form/Tests/FormRegistryTest.php
+++ b/src/Symfony/Component/Form/Tests/FormRegistryTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\FormRegistry;
 use Symfony\Component\Form\FormTypeGuesserChain;
 use Symfony\Component\Form\Tests\Fixtures\TestExtension;
@@ -23,7 +24,7 @@
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class FormRegistryTest extends \PHPUnit_Framework_TestCase
+class FormRegistryTest extends TestCase
 {
     /**
      * @var FormRegistry
diff --git a/src/Symfony/Component/Form/Tests/FormRendererTest.php b/src/Symfony/Component/Form/Tests/FormRendererTest.php
index eda35e36acaf..452bb71e8905 100644
--- a/src/Symfony/Component/Form/Tests/FormRendererTest.php
+++ b/src/Symfony/Component/Form/Tests/FormRendererTest.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Form\Tests;
 
-class FormRendererTest extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class FormRendererTest extends TestCase
 {
     public function testHumanize()
     {
diff --git a/src/Symfony/Component/Form/Tests/Guess/GuessTest.php b/src/Symfony/Component/Form/Tests/Guess/GuessTest.php
index 2422663720c6..8f7e1d020302 100644
--- a/src/Symfony/Component/Form/Tests/Guess/GuessTest.php
+++ b/src/Symfony/Component/Form/Tests/Guess/GuessTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Form\Tests\Guess;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Guess\Guess;
 
 class TestGuess extends Guess
 {
 }
 
-class GuessTest extends \PHPUnit_Framework_TestCase
+class GuessTest extends TestCase
 {
     public function testGetBestGuessReturnsGuessWithHighestConfidence()
     {
diff --git a/src/Symfony/Component/Form/Tests/ResolvedFormTypeTest.php b/src/Symfony/Component/Form/Tests/ResolvedFormTypeTest.php
index 942c06e43e4f..6ae8a85bcfc8 100644
--- a/src/Symfony/Component/Form/Tests/ResolvedFormTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/ResolvedFormTypeTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Form\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\ResolvedFormType;
 use Symfony\Component\Form\FormBuilder;
 use Symfony\Component\OptionsResolver\OptionsResolver;
@@ -18,7 +19,7 @@
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class ResolvedFormTypeTest extends \PHPUnit_Framework_TestCase
+class ResolvedFormTypeTest extends TestCase
 {
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
@@ -61,7 +62,7 @@ public function testGetOptionsResolver()
 
         $assertIndexAndAddOption = function ($index, $option, $default) use (&$i, $test) {
             return function (OptionsResolver $resolver) use (&$i, $test, $index, $option, $default) {
-                /* @var \PHPUnit_Framework_TestCase $test */
+                /* @var TestCase $test */
                 $test->assertEquals($index, $i, 'Executed at index '.$index);
 
                 ++$i;
@@ -160,7 +161,7 @@ public function testBuildForm()
 
         $assertIndex = function ($index) use (&$i, $test) {
             return function () use (&$i, $test, $index) {
-                /* @var \PHPUnit_Framework_TestCase $test */
+                /* @var TestCase $test */
                 $test->assertEquals($index, $i, 'Executed at index '.$index);
 
                 ++$i;
@@ -228,7 +229,7 @@ public function testBuildView()
 
         $assertIndex = function ($index) use (&$i, $test) {
             return function () use (&$i, $test, $index) {
-                /* @var \PHPUnit_Framework_TestCase $test */
+                /* @var TestCase $test */
                 $test->assertEquals($index, $i, 'Executed at index '.$index);
 
                 ++$i;
@@ -272,7 +273,7 @@ public function testFinishView()
 
         $assertIndex = function ($index) use (&$i, $test) {
             return function () use (&$i, $test, $index) {
-                /* @var \PHPUnit_Framework_TestCase $test */
+                /* @var TestCase $test */
                 $test->assertEquals($index, $i, 'Executed at index '.$index);
 
                 ++$i;
diff --git a/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
index 7596b879a18b..fb2bc47ef1c8 100644
--- a/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Form/Tests/Resources/TranslationFilesTest.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Form\Tests\Resources;
 
-class TranslationFilesTest extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class TranslationFilesTest extends TestCase
 {
     /**
      * @dataProvider provideTranslationFiles
diff --git a/src/Symfony/Component/Form/Tests/Util/OrderedHashMapTest.php b/src/Symfony/Component/Form/Tests/Util/OrderedHashMapTest.php
index dd51fa5d23a3..4328919651ef 100644
--- a/src/Symfony/Component/Form/Tests/Util/OrderedHashMapTest.php
+++ b/src/Symfony/Component/Form/Tests/Util/OrderedHashMapTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Form\Tests\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Util\OrderedHashMap;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class OrderedHashMapTest extends \PHPUnit_Framework_TestCase
+class OrderedHashMapTest extends TestCase
 {
     public function testGet()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderItemTest.php b/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderItemTest.php
index e4f354fc1f27..cb43bb35168a 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderItemTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderItemTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\AcceptHeaderItem;
 
-class AcceptHeaderItemTest extends \PHPUnit_Framework_TestCase
+class AcceptHeaderItemTest extends TestCase
 {
     /**
      * @dataProvider provideFromStringData
diff --git a/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderTest.php b/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderTest.php
index 9b3b58e21424..9929eac28ef0 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\AcceptHeader;
 use Symfony\Component\HttpFoundation\AcceptHeaderItem;
 
-class AcceptHeaderTest extends \PHPUnit_Framework_TestCase
+class AcceptHeaderTest extends TestCase
 {
     public function testFirst()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ApacheRequestTest.php b/src/Symfony/Component/HttpFoundation/Tests/ApacheRequestTest.php
index 6845118cc2e3..157ab90ec59a 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ApacheRequestTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ApacheRequestTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\ApacheRequest;
 
-class ApacheRequestTest extends \PHPUnit_Framework_TestCase
+class ApacheRequestTest extends TestCase
 {
     /**
      * @dataProvider provideServerVars
diff --git a/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php b/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php
index d9f2e2114d41..f3f74f635eb4 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Cookie;
 
 /**
@@ -21,7 +22,7 @@
  *
  * @group time-sensitive
  */
-class CookieTest extends \PHPUnit_Framework_TestCase
+class CookieTest extends TestCase
 {
     public function invalidNames()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ExpressionRequestMatcherTest.php b/src/Symfony/Component/HttpFoundation/Tests/ExpressionRequestMatcherTest.php
index fda372f3fb70..1152e46c0be7 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ExpressionRequestMatcherTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ExpressionRequestMatcherTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
 use Symfony\Component\HttpFoundation\ExpressionRequestMatcher;
 use Symfony\Component\HttpFoundation\Request;
 
-class ExpressionRequestMatcherTest extends \PHPUnit_Framework_TestCase
+class ExpressionRequestMatcherTest extends TestCase
 {
     /**
      * @expectedException \LogicException
diff --git a/src/Symfony/Component/HttpFoundation/Tests/File/FileTest.php b/src/Symfony/Component/HttpFoundation/Tests/File/FileTest.php
index 129d99eea43b..eea437f13e5f 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/File/FileTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/File/FileTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\File;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\File\File;
 use Symfony\Component\HttpFoundation\File\MimeType\MimeTypeGuesser;
 
-class FileTest extends \PHPUnit_Framework_TestCase
+class FileTest extends TestCase
 {
     protected $file;
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/File/MimeType/MimeTypeTest.php b/src/Symfony/Component/HttpFoundation/Tests/File/MimeType/MimeTypeTest.php
index 1d5648eada8e..3fb15e9c8ac4 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/File/MimeType/MimeTypeTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/File/MimeType/MimeTypeTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\File\MimeType;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\File\MimeType\MimeTypeGuesser;
 use Symfony\Component\HttpFoundation\File\MimeType\FileBinaryMimeTypeGuesser;
 
 /**
  * @requires extension fileinfo
  */
-class MimeTypeTest extends \PHPUnit_Framework_TestCase
+class MimeTypeTest extends TestCase
 {
     protected $path;
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php b/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php
index 0837250780b8..eafeb4fb6d61 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\File;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\File\UploadedFile;
 
-class UploadedFileTest extends \PHPUnit_Framework_TestCase
+class UploadedFileTest extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/FileBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/FileBagTest.php
index 738604bcc789..e7defa677713 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/FileBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/FileBagTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\File\UploadedFile;
 use Symfony\Component\HttpFoundation\FileBag;
 
@@ -20,7 +21,7 @@
  * @author Fabien Potencier <fabien@symfony.com>
  * @author Bulat Shakirzyanov <mallluhuct@gmail.com>
  */
-class FileBagTest extends \PHPUnit_Framework_TestCase
+class FileBagTest extends TestCase
 {
     /**
      * @expectedException \InvalidArgumentException
diff --git a/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php
index d4d02d94fead..e5b1b38fdd02 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\HeaderBag;
 
-class HeaderBagTest extends \PHPUnit_Framework_TestCase
+class HeaderBagTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php b/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
index a6d28a2943bb..61aa74861dde 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\IpUtils;
 
-class IpUtilsTest extends \PHPUnit_Framework_TestCase
+class IpUtilsTest extends TestCase
 {
     /**
      * @dataProvider testIpv4Provider
diff --git a/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
index 7b1c44674e36..8156da06939e 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\JsonResponse;
 
-class JsonResponseTest extends \PHPUnit_Framework_TestCase
+class JsonResponseTest extends TestCase
 {
     public function testConstructorEmptyCreatesJsonObject()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php
index b0e21edd0a21..5ee2954db946 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\ParameterBag;
 
-class ParameterBagTest extends \PHPUnit_Framework_TestCase
+class ParameterBagTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/RedirectResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/RedirectResponseTest.php
index 2a097d6fd422..9e3e90c53e4f 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/RedirectResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/RedirectResponseTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\RedirectResponse;
 
-class RedirectResponseTest extends \PHPUnit_Framework_TestCase
+class RedirectResponseTest extends TestCase
 {
     public function testGenerateMetaRedirect()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/RequestMatcherTest.php b/src/Symfony/Component/HttpFoundation/Tests/RequestMatcherTest.php
index cee9bcc26144..6f864d4468fe 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/RequestMatcherTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/RequestMatcherTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\RequestMatcher;
 use Symfony\Component\HttpFoundation\Request;
 
-class RequestMatcherTest extends \PHPUnit_Framework_TestCase
+class RequestMatcherTest extends TestCase
 {
     /**
      * @dataProvider testMethodFixtures
diff --git a/src/Symfony/Component/HttpFoundation/Tests/RequestStackTest.php b/src/Symfony/Component/HttpFoundation/Tests/RequestStackTest.php
index e26b806fd287..a84fb26f0b59 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/RequestStackTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/RequestStackTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\RequestStack;
 
-class RequestStackTest extends \PHPUnit_Framework_TestCase
+class RequestStackTest extends TestCase
 {
     public function testGetCurrentRequest()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php b/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php
index 74f058923f13..47c435f24b11 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\MockArraySessionStorage;
 use Symfony\Component\HttpFoundation\Session\Session;
 use Symfony\Component\HttpFoundation\Request;
 
-class RequestTest extends \PHPUnit_Framework_TestCase
+class RequestTest extends TestCase
 {
     public function testInitialize()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
index ef91f52af512..debcdc1faf16 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\ResponseHeaderBag;
 use Symfony\Component\HttpFoundation\Cookie;
 
 /**
  * @group time-sensitive
  */
-class ResponseHeaderBagTest extends \PHPUnit_Framework_TestCase
+class ResponseHeaderBagTest extends TestCase
 {
     /**
      * @dataProvider provideAllPreserveCase
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ResponseTestCase.php b/src/Symfony/Component/HttpFoundation/Tests/ResponseTestCase.php
index 94c770a894ba..4ead34c1053d 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ResponseTestCase.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ResponseTestCase.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 
-abstract class ResponseTestCase extends \PHPUnit_Framework_TestCase
+abstract class ResponseTestCase extends TestCase
 {
     public function testNoCacheControlHeaderOnAttachmentUsingHTTPSAndMSIE()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ServerBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/ServerBagTest.php
index 41e44e10056e..c1d9d12a654b 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ServerBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ServerBagTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\ServerBag;
 
 /**
@@ -18,7 +19,7 @@
  *
  * @author Bulat Shakirzyanov <mallluhuct@gmail.com>
  */
-class ServerBagTest extends \PHPUnit_Framework_TestCase
+class ServerBagTest extends TestCase
 {
     public function testShouldExtractHeadersFromServerArray()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php
index ca6ce8a38670..8c148b58f06c 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Attribute;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Attribute\AttributeBag;
 
 /**
@@ -18,7 +19,7 @@
  *
  * @author Drak <drak@zikula.org>
  */
-class AttributeBagTest extends \PHPUnit_Framework_TestCase
+class AttributeBagTest extends TestCase
 {
     /**
      * @var array
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/NamespacedAttributeBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/NamespacedAttributeBagTest.php
index 470038fe5517..d9d9eb7fbee7 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/NamespacedAttributeBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/NamespacedAttributeBagTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Attribute;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Attribute\NamespacedAttributeBag;
 
 /**
@@ -18,7 +19,7 @@
  *
  * @author Drak <drak@zikula.org>
  */
-class NamespacedAttributeBagTest extends \PHPUnit_Framework_TestCase
+class NamespacedAttributeBagTest extends TestCase
 {
     /**
      * @var array
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/AutoExpireFlashBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/AutoExpireFlashBagTest.php
index 852158f1870b..4eb200afa3bd 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/AutoExpireFlashBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/AutoExpireFlashBagTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Flash;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Flash\AutoExpireFlashBag as FlashBag;
 
 /**
@@ -18,7 +19,7 @@
  *
  * @author Drak <drak@zikula.org>
  */
-class AutoExpireFlashBagTest extends \PHPUnit_Framework_TestCase
+class AutoExpireFlashBagTest extends TestCase
 {
     /**
      * @var \Symfony\Component\HttpFoundation\Session\Flash\AutoExpireFlashBag
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php
index 1dbbabd5a1a8..3de22460357b 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Flash;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Flash\FlashBag;
 
 /**
@@ -18,7 +19,7 @@
  *
  * @author Drak <drak@zikula.org>
  */
-class FlashBagTest extends \PHPUnit_Framework_TestCase
+class FlashBagTest extends TestCase
 {
     /**
      * @var \Symfony\Component\HttpFoundation\Session\Flash\FlashBagInterface
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php
index 57460c6daac5..4d5d337a3c01 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Session;
 use Symfony\Component\HttpFoundation\Session\Flash\FlashBag;
 use Symfony\Component\HttpFoundation\Session\Attribute\AttributeBag;
@@ -23,7 +24,7 @@
  * @author Robert Schönthal <seroscho@googlemail.com>
  * @author Drak <drak@zikula.org>
  */
-class SessionTest extends \PHPUnit_Framework_TestCase
+class SessionTest extends TestCase
 {
     /**
      * @var \Symfony\Component\HttpFoundation\Session\Storage\SessionStorageInterface
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/LegacyPdoSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/LegacyPdoSessionHandlerTest.php
index f8497f53ec7d..8559e6791187 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/LegacyPdoSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/LegacyPdoSessionHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Handler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Handler\LegacyPdoSessionHandler;
 
 /**
@@ -18,7 +19,7 @@
  * @group time-sensitive
  * @requires extension pdo_sqlite
  */
-class LegacyPdoSessionHandlerTest extends \PHPUnit_Framework_TestCase
+class LegacyPdoSessionHandlerTest extends TestCase
 {
     private $pdo;
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcacheSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcacheSessionHandlerTest.php
index b321a9279c60..06193c8befbe 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcacheSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcacheSessionHandlerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Handler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Handler\MemcacheSessionHandler;
 
 /**
  * @requires extension memcache
  * @group time-sensitive
  */
-class MemcacheSessionHandlerTest extends \PHPUnit_Framework_TestCase
+class MemcacheSessionHandlerTest extends TestCase
 {
     const PREFIX = 'prefix_';
     const TTL = 1000;
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
index 2ffd7c15c5f6..2e7be359efcf 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Handler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Handler\MemcachedSessionHandler;
 
 /**
  * @requires extension memcached
  * @group time-sensitive
  */
-class MemcachedSessionHandlerTest extends \PHPUnit_Framework_TestCase
+class MemcachedSessionHandlerTest extends TestCase
 {
     const PREFIX = 'prefix_';
     const TTL = 1000;
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
index 37ccf9ef19f0..f23161c10b07 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Handler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Handler\MongoDbSessionHandler;
 
 /**
  * @author Markus Bachmann <markus.bachmann@bachi.biz>
  * @group time-sensitive
  */
-class MongoDbSessionHandlerTest extends \PHPUnit_Framework_TestCase
+class MongoDbSessionHandlerTest extends TestCase
 {
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeFileSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeFileSessionHandlerTest.php
index ab848b6b972a..947502f7b166 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeFileSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeFileSessionHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Handler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Handler\NativeFileSessionHandler;
 use Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage;
 
@@ -22,7 +23,7 @@
  * @runTestsInSeparateProcesses
  * @preserveGlobalState disabled
  */
-class NativeFileSessionHandlerTest extends \PHPUnit_Framework_TestCase
+class NativeFileSessionHandlerTest extends TestCase
 {
     public function testConstruct()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeSessionHandlerTest.php
index 3437cf08f1d8..bd335b3b4cf7 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeSessionHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Handler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Handler\NativeSessionHandler;
 
 /**
@@ -21,7 +22,7 @@
  * @runTestsInSeparateProcesses
  * @preserveGlobalState disabled
  */
-class NativeSessionHandlerTest extends \PHPUnit_Framework_TestCase
+class NativeSessionHandlerTest extends TestCase
 {
     public function testConstruct()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NullSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NullSessionHandlerTest.php
index 35823d685ddf..718fd0f830e4 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NullSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NullSessionHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Handler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Handler\NullSessionHandler;
 use Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage;
 use Symfony\Component\HttpFoundation\Session\Session;
@@ -23,7 +24,7 @@
  * @runTestsInSeparateProcesses
  * @preserveGlobalState disabled
  */
-class NullSessionHandlerTest extends \PHPUnit_Framework_TestCase
+class NullSessionHandlerTest extends TestCase
 {
     public function testSaveHandlers()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php
index cfc8acebaaf9..a47120f1807e 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Handler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler;
 
 /**
  * @requires extension pdo_sqlite
  * @group time-sensitive
  */
-class PdoSessionHandlerTest extends \PHPUnit_Framework_TestCase
+class PdoSessionHandlerTest extends TestCase
 {
     private $dbFile;
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/WriteCheckSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/WriteCheckSessionHandlerTest.php
index 4fbf31aa3ebb..5e41a4743edd 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/WriteCheckSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/WriteCheckSessionHandlerTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Handler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Handler\WriteCheckSessionHandler;
 
 /**
  * @author Adrien Brault <adrien.brault@gmail.com>
  */
-class WriteCheckSessionHandlerTest extends \PHPUnit_Framework_TestCase
+class WriteCheckSessionHandlerTest extends TestCase
 {
     public function test()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MetadataBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MetadataBagTest.php
index 2fa473fbdf5c..1f55a2d5c440 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MetadataBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MetadataBagTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\MetadataBag;
 
 /**
@@ -18,7 +19,7 @@
  *
  * @group time-sensitive
  */
-class MetadataBagTest extends \PHPUnit_Framework_TestCase
+class MetadataBagTest extends TestCase
 {
     /**
      * @var MetadataBag
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockArraySessionStorageTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockArraySessionStorageTest.php
index c56ea4a60071..99da778b5fd8 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockArraySessionStorageTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockArraySessionStorageTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\MockArraySessionStorage;
 use Symfony\Component\HttpFoundation\Session\Attribute\AttributeBag;
 use Symfony\Component\HttpFoundation\Session\Flash\FlashBag;
@@ -20,7 +21,7 @@
  *
  * @author Drak <drak@zikula.org>
  */
-class MockArraySessionStorageTest extends \PHPUnit_Framework_TestCase
+class MockArraySessionStorageTest extends TestCase
 {
     /**
      * @var MockArraySessionStorage
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockFileSessionStorageTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockFileSessionStorageTest.php
index 54321ea4f771..53accd38447d 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockFileSessionStorageTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockFileSessionStorageTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\MockFileSessionStorage;
 use Symfony\Component\HttpFoundation\Session\Flash\FlashBag;
 use Symfony\Component\HttpFoundation\Session\Attribute\AttributeBag;
@@ -20,7 +21,7 @@
  *
  * @author Drak <drak@zikula.org>
  */
-class MockFileSessionStorageTest extends \PHPUnit_Framework_TestCase
+class MockFileSessionStorageTest extends TestCase
 {
     /**
      * @var string
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
index 160b5758620b..4da9a1bc515c 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Attribute\AttributeBag;
 use Symfony\Component\HttpFoundation\Session\Flash\FlashBag;
 use Symfony\Component\HttpFoundation\Session\Storage\Handler\NativeSessionHandler;
@@ -29,7 +30,7 @@
  * @runTestsInSeparateProcesses
  * @preserveGlobalState disabled
  */
-class NativeSessionStorageTest extends \PHPUnit_Framework_TestCase
+class NativeSessionStorageTest extends TestCase
 {
     private $savePath;
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/PhpBridgeSessionStorageTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/PhpBridgeSessionStorageTest.php
index 7c865cb3db55..99491ce86ac2 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/PhpBridgeSessionStorageTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/PhpBridgeSessionStorageTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\PhpBridgeSessionStorage;
 use Symfony\Component\HttpFoundation\Session\Attribute\AttributeBag;
 
@@ -24,7 +25,7 @@
  * @runTestsInSeparateProcesses
  * @preserveGlobalState disabled
  */
-class PhpBridgeSessionStorageTest extends \PHPUnit_Framework_TestCase
+class PhpBridgeSessionStorageTest extends TestCase
 {
     private $savePath;
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/AbstractProxyTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/AbstractProxyTest.php
index eab420f9a1ba..efd8d80d35c5 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/AbstractProxyTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/AbstractProxyTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Proxy;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Proxy\AbstractProxy;
 
 // Note until PHPUnit_Mock_Objects 1.2 is released you cannot mock abstracts due to
@@ -51,7 +52,7 @@ public function gc($maxlifetime)
  *
  * @author Drak <drak@zikula.org>
  */
-class AbstractProxyTest extends \PHPUnit_Framework_TestCase
+class AbstractProxyTest extends TestCase
 {
     /**
      * @var AbstractProxy
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/NativeProxyTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/NativeProxyTest.php
index e9184ce06eed..8ec305344136 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/NativeProxyTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/NativeProxyTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Proxy;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Proxy\NativeProxy;
 
 /**
@@ -18,7 +19,7 @@
  *
  * @author Drak <drak@zikula.org>
  */
-class NativeProxyTest extends \PHPUnit_Framework_TestCase
+class NativeProxyTest extends TestCase
 {
     public function testIsWrapper()
     {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/SessionHandlerProxyTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/SessionHandlerProxyTest.php
index 052296a4c5fb..243f850b5ebd 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/SessionHandlerProxyTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/SessionHandlerProxyTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpFoundation\Tests\Session\Storage\Proxy;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Session\Storage\Proxy\SessionHandlerProxy;
 
 /**
@@ -21,7 +22,7 @@
  * @runTestsInSeparateProcesses
  * @preserveGlobalState disabled
  */
-class SessionHandlerProxyTest extends \PHPUnit_Framework_TestCase
+class SessionHandlerProxyTest extends TestCase
 {
     /**
      * @var \PHPUnit_Framework_MockObject_Matcher
diff --git a/src/Symfony/Component/HttpFoundation/Tests/StreamedResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/StreamedResponseTest.php
index 940f17cac48c..844274b1e7e2 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/StreamedResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/StreamedResponseTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\HttpFoundation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\StreamedResponse;
 
-class StreamedResponseTest extends \PHPUnit_Framework_TestCase
+class StreamedResponseTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/Bundle/BundleTest.php b/src/Symfony/Component/HttpKernel/Tests/Bundle/BundleTest.php
index 58644336984b..f5c40cbb4d22 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Bundle/BundleTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Bundle/BundleTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Bundle;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\HttpKernel\Tests\Fixtures\ExtensionNotValidBundle\ExtensionNotValidBundle;
 use Symfony\Component\HttpKernel\Tests\Fixtures\ExtensionPresentBundle\ExtensionPresentBundle;
 use Symfony\Component\HttpKernel\Tests\Fixtures\ExtensionAbsentBundle\ExtensionAbsentBundle;
 use Symfony\Component\HttpKernel\Tests\Fixtures\ExtensionPresentBundle\Command\FooCommand;
 
-class BundleTest extends \PHPUnit_Framework_TestCase
+class BundleTest extends TestCase
 {
     public function testRegisterCommands()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/CacheClearer/ChainCacheClearerTest.php b/src/Symfony/Component/HttpKernel/Tests/CacheClearer/ChainCacheClearerTest.php
index 41af579b06fd..1bc853349f23 100644
--- a/src/Symfony/Component/HttpKernel/Tests/CacheClearer/ChainCacheClearerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/CacheClearer/ChainCacheClearerTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpKernel\Tests\CacheClearer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\CacheClearer\ChainCacheClearer;
 
-class ChainCacheClearerTest extends \PHPUnit_Framework_TestCase
+class ChainCacheClearerTest extends TestCase
 {
     protected static $cacheDir;
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerAggregateTest.php b/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerAggregateTest.php
index e78c8d14cc12..d07ade303f10 100644
--- a/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerAggregateTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerAggregateTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpKernel\Tests\CacheWarmer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\CacheWarmer\CacheWarmerAggregate;
 
-class CacheWarmerAggregateTest extends \PHPUnit_Framework_TestCase
+class CacheWarmerAggregateTest extends TestCase
 {
     protected static $cacheDir;
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerTest.php b/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerTest.php
index fe5ecb2ed313..05666cb0dcdc 100644
--- a/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpKernel\Tests\CacheWarmer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\CacheWarmer\CacheWarmer;
 
-class CacheWarmerTest extends \PHPUnit_Framework_TestCase
+class CacheWarmerTest extends TestCase
 {
     protected static $cacheFile;
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/ClientTest.php b/src/Symfony/Component/HttpKernel/Tests/ClientTest.php
index b5d2c9cedd89..ac3ea1e860af 100644
--- a/src/Symfony/Component/HttpKernel/Tests/ClientTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/ClientTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\Client;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\StreamedResponse;
@@ -18,7 +19,7 @@
 use Symfony\Component\HttpFoundation\File\UploadedFile;
 use Symfony\Component\HttpKernel\Tests\Fixtures\TestClient;
 
-class ClientTest extends \PHPUnit_Framework_TestCase
+class ClientTest extends TestCase
 {
     public function testDoRequest()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/Config/EnvParametersResourceTest.php b/src/Symfony/Component/HttpKernel/Tests/Config/EnvParametersResourceTest.php
index ee5ecce3ced3..6fe8a6756899 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Config/EnvParametersResourceTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Config/EnvParametersResourceTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Config;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\Config\EnvParametersResource;
 
-class EnvParametersResourceTest extends \PHPUnit_Framework_TestCase
+class EnvParametersResourceTest extends TestCase
 {
     protected $prefix = '__DUMMY_';
     protected $initialEnv;
diff --git a/src/Symfony/Component/HttpKernel/Tests/Config/FileLocatorTest.php b/src/Symfony/Component/HttpKernel/Tests/Config/FileLocatorTest.php
index b7babf2c5f63..397edbc8a71d 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Config/FileLocatorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Config/FileLocatorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Config;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\Config\FileLocator;
 
-class FileLocatorTest extends \PHPUnit_Framework_TestCase
+class FileLocatorTest extends TestCase
 {
     public function testLocate()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php b/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php
index 53aa6ca3c64b..046b71ac0117 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Controller;
 
+use PHPUnit\Framework\TestCase;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\HttpKernel\Controller\ControllerResolver;
 use Symfony\Component\HttpKernel\Tests\Fixtures\Controller\NullableController;
 use Symfony\Component\HttpKernel\Tests\Fixtures\Controller\VariadicController;
 use Symfony\Component\HttpFoundation\Request;
 
-class ControllerResolverTest extends \PHPUnit_Framework_TestCase
+class ControllerResolverTest extends TestCase
 {
     public function testGetControllerWithoutControllerParameter()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php
index 4a0dc263b7d8..b6dfb70c1b62 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\DataCollector\ConfigDataCollector;
 use Symfony\Component\HttpKernel\Kernel;
 use Symfony\Component\Config\Loader\LoaderInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 
-class ConfigDataCollectorTest extends \PHPUnit_Framework_TestCase
+class ConfigDataCollectorTest extends TestCase
 {
     public function testCollect()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php
index 68d28cf2d211..48b46efad055 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\DataCollector\DumpDataCollector;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -19,7 +20,7 @@
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  */
-class DumpDataCollectorTest extends \PHPUnit_Framework_TestCase
+class DumpDataCollectorTest extends TestCase
 {
     public function testDump()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/ExceptionDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/ExceptionDataCollectorTest.php
index 6c71f4c9ebdd..afad9f58af63 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/ExceptionDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/ExceptionDataCollectorTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Debug\Exception\FlattenException;
 use Symfony\Component\HttpKernel\DataCollector\ExceptionDataCollector;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 
-class ExceptionDataCollectorTest extends \PHPUnit_Framework_TestCase
+class ExceptionDataCollectorTest extends TestCase
 {
     public function testCollect()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php
index 01b72fd7d80e..7f390cf9fab5 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\DataCollector\LoggerDataCollector;
 
-class LoggerDataCollectorTest extends \PHPUnit_Framework_TestCase
+class LoggerDataCollectorTest extends TestCase
 {
     /**
      * @dataProvider getCollectTestData
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/MemoryDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/MemoryDataCollectorTest.php
index 340b42881688..ab78e9e8e178 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/MemoryDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/MemoryDataCollectorTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\DataCollector\MemoryDataCollector;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 
-class MemoryDataCollectorTest extends \PHPUnit_Framework_TestCase
+class MemoryDataCollectorTest extends TestCase
 {
     public function testCollect()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/RequestDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/RequestDataCollectorTest.php
index ba70bfa92abd..20bd1a8364b0 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/RequestDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/RequestDataCollectorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\HttpKernel;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\DataCollector\RequestDataCollector;
@@ -20,7 +21,7 @@
 use Symfony\Component\HttpFoundation\Cookie;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 
-class RequestDataCollectorTest extends \PHPUnit_Framework_TestCase
+class RequestDataCollectorTest extends TestCase
 {
     public function testCollect()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/TimeDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/TimeDataCollectorTest.php
index a07e924d86f2..814b958163dc 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/TimeDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/TimeDataCollectorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\DataCollector\TimeDataCollector;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -18,7 +19,7 @@
 /**
  * @group time-sensitive
  */
-class TimeDataCollectorTest extends \PHPUnit_Framework_TestCase
+class TimeDataCollectorTest extends TestCase
 {
     public function testCollect()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/Util/ValueExporterTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/Util/ValueExporterTest.php
index df0f108ebe7e..34b7a8fa7ea2 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/Util/ValueExporterTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/Util/ValueExporterTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DataCollector\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\DataCollector\Util\ValueExporter;
 
-class ValueExporterTest extends \PHPUnit_Framework_TestCase
+class ValueExporterTest extends TestCase
 {
     /**
      * @var ValueExporter
diff --git a/src/Symfony/Component/HttpKernel/Tests/Debug/TraceableEventDispatcherTest.php b/src/Symfony/Component/HttpKernel/Tests/Debug/TraceableEventDispatcherTest.php
index 32b286999f9d..d8c926f7938f 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Debug/TraceableEventDispatcherTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Debug/TraceableEventDispatcherTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Debug;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\HttpKernel\Debug\TraceableEventDispatcher;
 use Symfony\Component\HttpKernel\HttpKernel;
@@ -18,7 +19,7 @@
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Stopwatch\Stopwatch;
 
-class TraceableEventDispatcherTest extends \PHPUnit_Framework_TestCase
+class TraceableEventDispatcherTest extends TestCase
 {
     public function testStopwatchSections()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ContainerAwareHttpKernelTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ContainerAwareHttpKernelTest.php
index c6ce79783bde..abe061b5f2fd 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ContainerAwareHttpKernelTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ContainerAwareHttpKernelTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\DependencyInjection\ContainerAwareHttpKernel;
 use Symfony\Component\HttpFoundation\RequestStack;
@@ -21,7 +22,7 @@
 /**
  * @group legacy
  */
-class ContainerAwareHttpKernelTest extends \PHPUnit_Framework_TestCase
+class ContainerAwareHttpKernelTest extends TestCase
 {
     /**
      * @dataProvider getProviderTypes
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/FragmentRendererPassTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/FragmentRendererPassTest.php
index c4652cd88a66..2a27fcac2146 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/FragmentRendererPassTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/FragmentRendererPassTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\DependencyInjection\FragmentRendererPass;
 use Symfony\Component\HttpKernel\Fragment\FragmentRendererInterface;
 
-class FragmentRendererPassTest extends \PHPUnit_Framework_TestCase
+class FragmentRendererPassTest extends TestCase
 {
     /**
      * @group legacy
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/LazyLoadingFragmentHandlerTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/LazyLoadingFragmentHandlerTest.php
index a6170dfd4f54..60570ee693a1 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/LazyLoadingFragmentHandlerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/LazyLoadingFragmentHandlerTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\DependencyInjection\LazyLoadingFragmentHandler;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 
-class LazyLoadingFragmentHandlerTest extends \PHPUnit_Framework_TestCase
+class LazyLoadingFragmentHandlerTest extends TestCase
 {
     public function test()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/MergeExtensionConfigurationPassTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/MergeExtensionConfigurationPassTest.php
index 516813f072de..81fc8b455d18 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/MergeExtensionConfigurationPassTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/MergeExtensionConfigurationPassTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpKernel\Tests\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\DependencyInjection\MergeExtensionConfigurationPass;
 
-class MergeExtensionConfigurationPassTest extends \PHPUnit_Framework_TestCase
+class MergeExtensionConfigurationPassTest extends TestCase
 {
     public function testAutoloadMainExtension()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/AddRequestFormatsListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/AddRequestFormatsListenerTest.php
index c5b2c51e40ec..f4878f626f05 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/AddRequestFormatsListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/AddRequestFormatsListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\EventListener\AddRequestFormatsListener;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\KernelEvents;
@@ -20,7 +21,7 @@
  *
  * @author Gildas Quemener <gildas.quemener@gmail.com>
  */
-class AddRequestFormatsListenerTest extends \PHPUnit_Framework_TestCase
+class AddRequestFormatsListenerTest extends TestCase
 {
     /**
      * @var AddRequestFormatsListener
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/DebugHandlersListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/DebugHandlersListenerTest.php
index 2aa284cc71bc..d1349906bbe6 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/DebugHandlersListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/DebugHandlersListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Psr\Log\LogLevel;
 use Symfony\Component\Console\Event\ConsoleEvent;
 use Symfony\Component\Console\Command\Command;
@@ -32,7 +33,7 @@
  *
  * @author Nicolas Grekas <p@tchwork.com>
  */
-class DebugHandlersListenerTest extends \PHPUnit_Framework_TestCase
+class DebugHandlersListenerTest extends TestCase
 {
     public function testConfigure()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/DumpListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/DumpListenerTest.php
index c475bbfff3cc..332ec55bceb8 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/DumpListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/DumpListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\ConsoleEvents;
 use Symfony\Component\HttpKernel\EventListener\DumpListener;
 use Symfony\Component\VarDumper\Cloner\ClonerInterface;
@@ -23,7 +24,7 @@
  *
  * @author Nicolas Grekas <p@tchwork.com>
  */
-class DumpListenerTest extends \PHPUnit_Framework_TestCase
+class DumpListenerTest extends TestCase
 {
     public function testSubscribedEvents()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php
index 94c2557fb128..f5501a3f5978 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\EventListener\ExceptionListener;
 use Symfony\Component\HttpKernel\Log\DebugLoggerInterface;
@@ -26,7 +27,7 @@
  *
  * @group time-sensitive
  */
-class ExceptionListenerTest extends \PHPUnit_Framework_TestCase
+class ExceptionListenerTest extends TestCase
 {
     public function testConstruct()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/FragmentListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/FragmentListenerTest.php
index b1d7d82c135f..464b2ab462f1 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/FragmentListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/FragmentListenerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\EventListener\FragmentListener;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\HttpKernel\UriSigner;
 
-class FragmentListenerTest extends \PHPUnit_Framework_TestCase
+class FragmentListenerTest extends TestCase
 {
     public function testOnlyTriggeredOnFragmentRoute()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php
index 9b42f2775781..b6977ea88b6d 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\EventListener\LocaleListener;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 
-class LocaleListenerTest extends \PHPUnit_Framework_TestCase
+class LocaleListenerTest extends TestCase
 {
     private $requestStack;
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/ProfilerListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/ProfilerListenerTest.php
index 479287ceacac..882961bf5a1e 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/ProfilerListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/ProfilerListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Component\HttpKernel\EventListener\ProfilerListener;
 use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
@@ -20,7 +21,7 @@
 use Symfony\Component\HttpKernel\Exception\HttpException;
 use Symfony\Component\HttpKernel\Kernel;
 
-class ProfilerListenerTest extends \PHPUnit_Framework_TestCase
+class ProfilerListenerTest extends TestCase
 {
     /**
      * Test to ensure BC without RequestStack.
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/ResponseListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/ResponseListenerTest.php
index e23c2cd1881a..12a31eb3eeed 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/ResponseListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/ResponseListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\EventListener\ResponseListener;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -19,7 +20,7 @@
 use Symfony\Component\HttpKernel\KernelEvents;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 
-class ResponseListenerTest extends \PHPUnit_Framework_TestCase
+class ResponseListenerTest extends TestCase
 {
     private $dispatcher;
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/RouterListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/RouterListenerTest.php
index fd1543b6bc61..40636fa684d5 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/RouterListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/RouterListenerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\EventListener\RouterListener;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\Routing\RequestContext;
 
-class RouterListenerTest extends \PHPUnit_Framework_TestCase
+class RouterListenerTest extends TestCase
 {
     private $requestStack;
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/SurrogateListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/SurrogateListenerTest.php
index 0100131f00b1..1e79ebe05239 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/SurrogateListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/SurrogateListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\HttpCache\Esi;
 use Symfony\Component\HttpKernel\EventListener\SurrogateListener;
 use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
@@ -20,7 +21,7 @@
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 
-class SurrogateListenerTest extends \PHPUnit_Framework_TestCase
+class SurrogateListenerTest extends TestCase
 {
     public function testFilterDoesNothingForSubRequests()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/TestSessionListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/TestSessionListenerTest.php
index 34f561d1499c..52794e027283 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/TestSessionListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/TestSessionListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
@@ -24,7 +25,7 @@
  *
  * @author Bulat Shakirzyanov <mallluhuct@gmail.com>
  */
-class TestSessionListenerTest extends \PHPUnit_Framework_TestCase
+class TestSessionListenerTest extends TestCase
 {
     /**
      * @var TestSessionListener
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/TranslatorListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/TranslatorListenerTest.php
index b5b05bb454de..23b833177ab6 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/TranslatorListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/TranslatorListenerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Event\FinishRequestEvent;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\HttpKernel\EventListener\TranslatorListener;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 
-class TranslatorListenerTest extends \PHPUnit_Framework_TestCase
+class TranslatorListenerTest extends TestCase
 {
     private $listener;
     private $translator;
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/ValidateRequestListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/ValidateRequestListenerTest.php
index 7fcbc3b7e64f..8311a76e35a0 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/ValidateRequestListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/ValidateRequestListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\EventListener\ValidateRequestListener;
@@ -18,7 +19,7 @@
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\KernelEvents;
 
-class ValidateRequestListenerTest extends \PHPUnit_Framework_TestCase
+class ValidateRequestListenerTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\HttpFoundation\Exception\ConflictingHeadersException
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/EsiFragmentRendererTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/EsiFragmentRendererTest.php
index 88c92b67ebb8..6cefea6b02f3 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/EsiFragmentRendererTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/EsiFragmentRendererTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Fragment;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\Controller\ControllerReference;
 use Symfony\Component\HttpKernel\Fragment\EsiFragmentRenderer;
 use Symfony\Component\HttpKernel\HttpCache\Esi;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\UriSigner;
 
-class EsiFragmentRendererTest extends \PHPUnit_Framework_TestCase
+class EsiFragmentRendererTest extends TestCase
 {
     public function testRenderFallbackToInlineStrategyIfEsiNotSupported()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php
index 4f87037c2047..72ed971d48de 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Fragment;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\Fragment\FragmentHandler;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -18,7 +19,7 @@
 /**
  * @group time-sensitive
  */
-class FragmentHandlerTest extends \PHPUnit_Framework_TestCase
+class FragmentHandlerTest extends TestCase
 {
     private $requestStack;
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/HIncludeFragmentRendererTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/HIncludeFragmentRendererTest.php
index 9a9373c6d57d..1be052e5e62f 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/HIncludeFragmentRendererTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/HIncludeFragmentRendererTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Fragment;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\Controller\ControllerReference;
 use Symfony\Component\HttpKernel\Fragment\HIncludeFragmentRenderer;
 use Symfony\Component\HttpKernel\UriSigner;
 use Symfony\Component\HttpFoundation\Request;
 
-class HIncludeFragmentRendererTest extends \PHPUnit_Framework_TestCase
+class HIncludeFragmentRendererTest extends TestCase
 {
     /**
      * @expectedException \LogicException
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/InlineFragmentRendererTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/InlineFragmentRendererTest.php
index 49e94a0bb09b..f85fd5ed26fd 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/InlineFragmentRendererTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/InlineFragmentRendererTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Fragment;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\Controller\ControllerReference;
 use Symfony\Component\HttpKernel\HttpKernel;
 use Symfony\Component\HttpKernel\Fragment\InlineFragmentRenderer;
@@ -19,7 +20,7 @@
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 
-class InlineFragmentRendererTest extends \PHPUnit_Framework_TestCase
+class InlineFragmentRendererTest extends TestCase
 {
     public function testRender()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php
index 1b5f47119afc..3a040dedd6e5 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Fragment;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Controller\ControllerReference;
 
-class RoutableFragmentRendererTest extends \PHPUnit_Framework_TestCase
+class RoutableFragmentRendererTest extends TestCase
 {
     /**
      * @dataProvider getGenerateFragmentUriData
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/SsiFragmentRendererTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/SsiFragmentRendererTest.php
index ba54fcd3cfc5..b537625f2401 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/SsiFragmentRendererTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/SsiFragmentRendererTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Fragment;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\Controller\ControllerReference;
 use Symfony\Component\HttpKernel\Fragment\SsiFragmentRenderer;
 use Symfony\Component\HttpKernel\HttpCache\Ssi;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\UriSigner;
 
-class SsiFragmentRendererTest extends \PHPUnit_Framework_TestCase
+class SsiFragmentRendererTest extends TestCase
 {
     public function testRenderFallbackToInlineStrategyIfSsiNotSupported()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php
index dd8955780dcc..28a566e0d2e9 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\HttpKernel\Tests\HttpCache;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\HttpCache\Esi;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 
-class EsiTest extends \PHPUnit_Framework_TestCase
+class EsiTest extends TestCase
 {
     public function testHasSurrogateEsiCapability()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php
index 722e98760f11..96a66771a06b 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpKernel\Tests\HttpCache;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\HttpCache\Esi;
 use Symfony\Component\HttpKernel\HttpCache\HttpCache;
 use Symfony\Component\HttpKernel\HttpCache\Store;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 
-class HttpCacheTestCase extends \PHPUnit_Framework_TestCase
+class HttpCacheTestCase extends TestCase
 {
     protected $kernel;
     protected $cache;
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/ResponseCacheStrategyTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/ResponseCacheStrategyTest.php
index 41e40962406a..f30a3b6ad94a 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/ResponseCacheStrategyTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/ResponseCacheStrategyTest.php
@@ -15,10 +15,11 @@
 
 namespace Symfony\Component\HttpKernel\Tests\HttpCache;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\HttpCache\ResponseCacheStrategy;
 
-class ResponseCacheStrategyTest extends \PHPUnit_Framework_TestCase
+class ResponseCacheStrategyTest extends TestCase
 {
     public function testMinimumSharedMaxAgeWins()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php
index 357fc5671769..8634aff6f9d1 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\HttpKernel\Tests\HttpCache;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\HttpCache\Ssi;
 
-class SsiTest extends \PHPUnit_Framework_TestCase
+class SsiTest extends TestCase
 {
     public function testHasSurrogateSsiCapability()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/StoreTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/StoreTest.php
index bf4239beaea6..8b9e52b03ea9 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/StoreTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/StoreTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\HttpKernel\Tests\HttpCache;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\HttpCache\Store;
 
-class StoreTest extends \PHPUnit_Framework_TestCase
+class StoreTest extends TestCase
 {
     protected $request;
     protected $response;
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpKernelTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpKernelTest.php
index 270926f79c59..6a5b2331f713 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpKernelTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpKernelTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\HttpKernel;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\KernelEvents;
@@ -21,7 +22,7 @@
 use Symfony\Component\HttpFoundation\RedirectResponse;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 
-class HttpKernelTest extends \PHPUnit_Framework_TestCase
+class HttpKernelTest extends TestCase
 {
     /**
      * @expectedException \RuntimeException
diff --git a/src/Symfony/Component/HttpKernel/Tests/KernelTest.php b/src/Symfony/Component/HttpKernel/Tests/KernelTest.php
index 8639818397e6..8d4ebd7215db 100644
--- a/src/Symfony/Component/HttpKernel/Tests/KernelTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/KernelTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\HttpKernel\Bundle\BundleInterface;
 use Symfony\Component\HttpKernel\Config\EnvParametersResource;
@@ -22,7 +23,7 @@
 use Symfony\Component\HttpKernel\Tests\Fixtures\KernelForOverrideName;
 use Symfony\Component\HttpKernel\Tests\Fixtures\FooBarBundle;
 
-class KernelTest extends \PHPUnit_Framework_TestCase
+class KernelTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/Profiler/AbstractProfilerStorageTest.php b/src/Symfony/Component/HttpKernel/Tests/Profiler/AbstractProfilerStorageTest.php
index dc361ed0f08a..f3557eedcb88 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Profiler/AbstractProfilerStorageTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Profiler/AbstractProfilerStorageTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Profiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\Profiler\Profile;
 
-abstract class AbstractProfilerStorageTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractProfilerStorageTest extends TestCase
 {
     public function testStore()
     {
diff --git a/src/Symfony/Component/HttpKernel/Tests/Profiler/ProfilerTest.php b/src/Symfony/Component/HttpKernel/Tests/Profiler/ProfilerTest.php
index 6e56f8bcf5c3..6b2c57a07612 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Profiler/ProfilerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Profiler/ProfilerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\HttpKernel\Tests\Profiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\DataCollector\RequestDataCollector;
 use Symfony\Component\HttpKernel\Profiler\FileProfilerStorage;
 use Symfony\Component\HttpKernel\Profiler\Profiler;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 
-class ProfilerTest extends \PHPUnit_Framework_TestCase
+class ProfilerTest extends TestCase
 {
     private $tmp;
     private $storage;
diff --git a/src/Symfony/Component/HttpKernel/Tests/UriSignerTest.php b/src/Symfony/Component/HttpKernel/Tests/UriSignerTest.php
index 10f41b344dfd..06de8902dc8c 100644
--- a/src/Symfony/Component/HttpKernel/Tests/UriSignerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/UriSignerTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\HttpKernel\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\UriSigner;
 
-class UriSignerTest extends \PHPUnit_Framework_TestCase
+class UriSignerTest extends TestCase
 {
     public function testSign()
     {
diff --git a/src/Symfony/Component/Intl/Tests/Collator/AbstractCollatorTest.php b/src/Symfony/Component/Intl/Tests/Collator/AbstractCollatorTest.php
index 4f71c05e1d5d..3465bb0c1d64 100644
--- a/src/Symfony/Component/Intl/Tests/Collator/AbstractCollatorTest.php
+++ b/src/Symfony/Component/Intl/Tests/Collator/AbstractCollatorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Intl\Tests\Collator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Collator\Collator;
 
 /**
@@ -18,7 +19,7 @@
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-abstract class AbstractCollatorTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractCollatorTest extends TestCase
 {
     /**
      * @dataProvider asortProvider
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php
index 9ddef240a497..d76e2ab39af4 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Intl\Tests\Data\Bundle\Reader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Exception\ResourceBundleNotFoundException;
 use Symfony\Component\Intl\Data\Bundle\Reader\BundleEntryReader;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class BundleEntryReaderTest extends \PHPUnit_Framework_TestCase
+class BundleEntryReaderTest extends TestCase
 {
     const RES_DIR = '/res/dir';
 
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/IntlBundleReaderTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/IntlBundleReaderTest.php
index b2d7c63a9395..88e6974bf295 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/IntlBundleReaderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/IntlBundleReaderTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Intl\Tests\Data\Bundle\Reader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Data\Bundle\Reader\IntlBundleReader;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  * @requires extension intl
  */
-class IntlBundleReaderTest extends \PHPUnit_Framework_TestCase
+class IntlBundleReaderTest extends TestCase
 {
     /**
      * @var IntlBundleReader
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/JsonBundleReaderTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/JsonBundleReaderTest.php
index a6183edfe073..a8ccabe07bb7 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/JsonBundleReaderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/JsonBundleReaderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Intl\Tests\Data\Bundle\Reader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Data\Bundle\Reader\JsonBundleReader;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class JsonBundleReaderTest extends \PHPUnit_Framework_TestCase
+class JsonBundleReaderTest extends TestCase
 {
     /**
      * @var JsonBundleReader
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/PhpBundleReaderTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/PhpBundleReaderTest.php
index 3c58ee7c416c..51898cb2be5d 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/PhpBundleReaderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/PhpBundleReaderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Intl\Tests\Data\Bundle\Reader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Data\Bundle\Reader\PhpBundleReader;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class PhpBundleReaderTest extends \PHPUnit_Framework_TestCase
+class PhpBundleReaderTest extends TestCase
 {
     /**
      * @var PhpBundleReader
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/JsonBundleWriterTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/JsonBundleWriterTest.php
index 5e4c4b225e2b..b8610334d5a7 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/JsonBundleWriterTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/JsonBundleWriterTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Intl\Tests\Data\Bundle\Writer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\Intl\Data\Bundle\Writer\JsonBundleWriter;
 
@@ -18,7 +19,7 @@
  * @author Bernhard Schussek <bschussek@gmail.com>
  * @requires PHP 5.4
  */
-class JsonBundleWriterTest extends \PHPUnit_Framework_TestCase
+class JsonBundleWriterTest extends TestCase
 {
     /**
      * @var JsonBundleWriter
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/PhpBundleWriterTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/PhpBundleWriterTest.php
index ee7b12f1ed04..a4c0330e0d5e 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/PhpBundleWriterTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/PhpBundleWriterTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Intl\Tests\Data\Bundle\Writer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\Intl\Data\Bundle\Writer\PhpBundleWriter;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class PhpBundleWriterTest extends \PHPUnit_Framework_TestCase
+class PhpBundleWriterTest extends TestCase
 {
     /**
      * @var PhpBundleWriter
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/TextBundleWriterTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/TextBundleWriterTest.php
index 197a4e1fc05f..4908f2837026 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/TextBundleWriterTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/TextBundleWriterTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Intl\Tests\Data\Bundle\Writer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\Intl\Data\Bundle\Writer\TextBundleWriter;
 
@@ -19,7 +20,7 @@
  *
  * @see http://source.icu-project.org/repos/icu/icuhtml/trunk/design/bnf_rb.txt
  */
-class TextBundleWriterTest extends \PHPUnit_Framework_TestCase
+class TextBundleWriterTest extends TestCase
 {
     /**
      * @var TextBundleWriter
diff --git a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractDataProviderTest.php b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractDataProviderTest.php
index 431f588e77a8..e852c1eb34e5 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractDataProviderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractDataProviderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Intl\Tests\Data\Provider;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Data\Bundle\Reader\BundleEntryReader;
 use Symfony\Component\Intl\Data\Bundle\Reader\BundleReaderInterface;
 use Symfony\Component\Intl\Locale;
@@ -18,7 +19,7 @@
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-abstract class AbstractDataProviderTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractDataProviderTest extends TestCase
 {
     // Include the locales statically so that the data providers are decoupled
     // from the Intl class. Otherwise tests will fail if the intl extension is
diff --git a/src/Symfony/Component/Intl/Tests/Data/Util/LocaleScannerTest.php b/src/Symfony/Component/Intl/Tests/Data/Util/LocaleScannerTest.php
index fa487ba3b533..f76c71d8f7a4 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Util/LocaleScannerTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Util/LocaleScannerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Intl\Tests\Data\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\Intl\Data\Util\LocaleScanner;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class LocaleScannerTest extends \PHPUnit_Framework_TestCase
+class LocaleScannerTest extends TestCase
 {
     private $directory;
 
diff --git a/src/Symfony/Component/Intl/Tests/Data/Util/RingBufferTest.php b/src/Symfony/Component/Intl/Tests/Data/Util/RingBufferTest.php
index f19a1714f7f1..bbaecfcbd668 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Util/RingBufferTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Util/RingBufferTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Intl\Tests\Data\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Data\Util\RingBuffer;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class RingBufferTest extends \PHPUnit_Framework_TestCase
+class RingBufferTest extends TestCase
 {
     /**
      * @var RingBuffer
diff --git a/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php b/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php
index f2788ba469cd..88cc55e9be8c 100644
--- a/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php
+++ b/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Intl\Tests\DateFormatter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\DateFormatter\IntlDateFormatter;
 use Symfony\Component\Intl\Globals\IntlGlobals;
 
@@ -19,7 +20,7 @@
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-abstract class AbstractIntlDateFormatterTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractIntlDateFormatterTest extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/Intl/Tests/Globals/AbstractIntlGlobalsTest.php b/src/Symfony/Component/Intl/Tests/Globals/AbstractIntlGlobalsTest.php
index 75d54eb23486..57c75fb95494 100644
--- a/src/Symfony/Component/Intl/Tests/Globals/AbstractIntlGlobalsTest.php
+++ b/src/Symfony/Component/Intl/Tests/Globals/AbstractIntlGlobalsTest.php
@@ -11,12 +11,14 @@
 
 namespace Symfony\Component\Intl\Tests\Globals;
 
+use PHPUnit\Framework\TestCase;
+
 /**
  * Test case for intl function implementations.
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-abstract class AbstractIntlGlobalsTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractIntlGlobalsTest extends TestCase
 {
     public function errorNameProvider()
     {
diff --git a/src/Symfony/Component/Intl/Tests/Locale/AbstractLocaleTest.php b/src/Symfony/Component/Intl/Tests/Locale/AbstractLocaleTest.php
index 08569fad4d1a..cf991c9bcc6d 100644
--- a/src/Symfony/Component/Intl/Tests/Locale/AbstractLocaleTest.php
+++ b/src/Symfony/Component/Intl/Tests/Locale/AbstractLocaleTest.php
@@ -11,12 +11,14 @@
 
 namespace Symfony\Component\Intl\Tests\Locale;
 
+use PHPUnit\Framework\TestCase;
+
 /**
  * Test case for Locale implementations.
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-abstract class AbstractLocaleTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractLocaleTest extends TestCase
 {
     public function testSetDefault()
     {
diff --git a/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php b/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
index e424b715fce4..8ba2be2e23ca 100644
--- a/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
+++ b/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Intl\Tests\NumberFormatter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Globals\IntlGlobals;
 use Symfony\Component\Intl\NumberFormatter\NumberFormatter;
 use Symfony\Component\Intl\Util\IntlTestHelper;
@@ -19,7 +20,7 @@
  * Note that there are some values written like -2147483647 - 1. This is the lower 32bit int max and is a known
  * behavior of PHP.
  */
-abstract class AbstractNumberFormatterTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractNumberFormatterTest extends TestCase
 {
     /**
      * @dataProvider formatCurrencyWithDecimalStyleProvider
diff --git a/src/Symfony/Component/Intl/Tests/Util/IcuVersionTest.php b/src/Symfony/Component/Intl/Tests/Util/IcuVersionTest.php
index d1a7e8c15d88..2fe7a0e4587b 100644
--- a/src/Symfony/Component/Intl/Tests/Util/IcuVersionTest.php
+++ b/src/Symfony/Component/Intl/Tests/Util/IcuVersionTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Intl\Tests\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Util\IcuVersion;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class IcuVersionTest extends \PHPUnit_Framework_TestCase
+class IcuVersionTest extends TestCase
 {
     public function normalizeProvider()
     {
diff --git a/src/Symfony/Component/Intl/Tests/Util/VersionTest.php b/src/Symfony/Component/Intl/Tests/Util/VersionTest.php
index 60cec6c09970..b570b3ae96ae 100644
--- a/src/Symfony/Component/Intl/Tests/Util/VersionTest.php
+++ b/src/Symfony/Component/Intl/Tests/Util/VersionTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Intl\Tests\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Util\Version;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class VersionTest extends \PHPUnit_Framework_TestCase
+class VersionTest extends TestCase
 {
     public function normalizeProvider()
     {
diff --git a/src/Symfony/Component/Intl/Util/IntlTestHelper.php b/src/Symfony/Component/Intl/Util/IntlTestHelper.php
index c1e37a72ec8a..12c3ff05913c 100644
--- a/src/Symfony/Component/Intl/Util/IntlTestHelper.php
+++ b/src/Symfony/Component/Intl/Util/IntlTestHelper.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Intl\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Intl;
 
 /**
@@ -29,7 +30,7 @@ class IntlTestHelper
     /**
      * Should be called before tests that work fine with the stub implementation.
      */
-    public static function requireIntl(\PHPUnit_Framework_TestCase $testCase, $minimumIcuVersion = null)
+    public static function requireIntl(TestCase $testCase, $minimumIcuVersion = null)
     {
         if (null === $minimumIcuVersion) {
             $minimumIcuVersion = Intl::getIcuStubVersion();
@@ -63,7 +64,7 @@ public static function requireIntl(\PHPUnit_Framework_TestCase $testCase, $minim
      * Should be called before tests that require a feature-complete intl
      * implementation.
      */
-    public static function requireFullIntl(\PHPUnit_Framework_TestCase $testCase, $minimumIcuVersion = null)
+    public static function requireFullIntl(TestCase $testCase, $minimumIcuVersion = null)
     {
         // We only run tests if the intl extension is loaded...
         if (!Intl::isExtensionLoaded()) {
@@ -83,7 +84,7 @@ public static function requireFullIntl(\PHPUnit_Framework_TestCase $testCase, $m
     /**
      * Skips the test unless the current system has a 32bit architecture.
      */
-    public static function require32Bit(\PHPUnit_Framework_TestCase $testCase)
+    public static function require32Bit(TestCase $testCase)
     {
         if (4 !== PHP_INT_SIZE) {
             $testCase->markTestSkipped('PHP 32 bit is required.');
@@ -93,7 +94,7 @@ public static function require32Bit(\PHPUnit_Framework_TestCase $testCase)
     /**
      * Skips the test unless the current system has a 64bit architecture.
      */
-    public static function require64Bit(\PHPUnit_Framework_TestCase $testCase)
+    public static function require64Bit(TestCase $testCase)
     {
         if (8 !== PHP_INT_SIZE) {
             $testCase->markTestSkipped('PHP 64 bit is required.');
diff --git a/src/Symfony/Component/Locale/Tests/LocaleTest.php b/src/Symfony/Component/Locale/Tests/LocaleTest.php
index 6d160a08332b..63f82a72b411 100644
--- a/src/Symfony/Component/Locale/Tests/LocaleTest.php
+++ b/src/Symfony/Component/Locale/Tests/LocaleTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Locale\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Locale\Locale;
 use Symfony\Component\Intl\Util\IntlTestHelper;
 
@@ -21,7 +22,7 @@
  *
  * @group legacy
  */
-class LocaleTest extends \PHPUnit_Framework_TestCase
+class LocaleTest extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/Locale/Tests/Stub/StubLocaleTest.php b/src/Symfony/Component/Locale/Tests/Stub/StubLocaleTest.php
index b79ea86ea322..4d82b42881fa 100644
--- a/src/Symfony/Component/Locale/Tests/Stub/StubLocaleTest.php
+++ b/src/Symfony/Component/Locale/Tests/Stub/StubLocaleTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Locale\Tests\Stub;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Locale\Stub\StubLocale;
 
 /**
@@ -18,7 +19,7 @@
  *
  * @group legacy
  */
-class StubLocaleTest extends \PHPUnit_Framework_TestCase
+class StubLocaleTest extends TestCase
 {
     public function testGetCurrenciesData()
     {
diff --git a/src/Symfony/Component/OptionsResolver/Tests/LegacyOptionsResolverTest.php b/src/Symfony/Component/OptionsResolver/Tests/LegacyOptionsResolverTest.php
index ee89f5279797..c277425c4d7f 100644
--- a/src/Symfony/Component/OptionsResolver/Tests/LegacyOptionsResolverTest.php
+++ b/src/Symfony/Component/OptionsResolver/Tests/LegacyOptionsResolverTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\OptionsResolver\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 use Symfony\Component\OptionsResolver\Options;
 
 /**
  * @group legacy
  */
-class LegacyOptionsResolverTest extends \PHPUnit_Framework_TestCase
+class LegacyOptionsResolverTest extends TestCase
 {
     /**
      * @var OptionsResolver
@@ -122,7 +123,7 @@ public function testResolveLazyDependencyOnMissingOptionalWithoutDefault()
 
         $this->resolver->setDefaults(array(
             'two' => function (Options $options) use ($test) {
-                /* @var \PHPUnit_Framework_TestCase $test */
+                /* @var TestCase $test */
                 $test->assertFalse(isset($options['one']));
 
                 return '2';
@@ -146,7 +147,7 @@ public function testResolveLazyDependencyOnOptionalWithoutDefault()
 
         $this->resolver->setDefaults(array(
             'two' => function (Options $options) use ($test) {
-                /* @var \PHPUnit_Framework_TestCase $test */
+                /* @var TestCase $test */
                 $test->assertTrue(isset($options['one']));
 
                 return $options['one'].'2';
@@ -190,7 +191,7 @@ public function testResolveLazyReplaceDefaults()
 
         $this->resolver->setDefaults(array(
             'one' => function (Options $options) use ($test) {
-                /* @var \PHPUnit_Framework_TestCase $test */
+                /* @var TestCase $test */
                 $test->fail('Previous closure should not be executed');
             },
         ));
diff --git a/src/Symfony/Component/OptionsResolver/Tests/LegacyOptionsTest.php b/src/Symfony/Component/OptionsResolver/Tests/LegacyOptionsTest.php
index fb4d25b5bcea..642d1d5e22fa 100644
--- a/src/Symfony/Component/OptionsResolver/Tests/LegacyOptionsTest.php
+++ b/src/Symfony/Component/OptionsResolver/Tests/LegacyOptionsTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\OptionsResolver\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\OptionsResolver\Options;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 
 /**
  * @group legacy
  */
-class LegacyOptionsTest extends \PHPUnit_Framework_TestCase
+class LegacyOptionsTest extends TestCase
 {
     /**
      * @var OptionsResolver
@@ -49,7 +50,7 @@ public function testOverloadKeepsPreviousValue()
 
         // defined by subclass
         $this->options->overload('foo', function (Options $options, $previousValue) use ($test) {
-            /* @var \PHPUnit_Framework_TestCase $test */
+            /* @var TestCase $test */
             $test->assertEquals('bar', $previousValue);
 
             return 'dynamic';
@@ -69,7 +70,7 @@ public function testPreviousValueIsEvaluatedIfLazy()
 
         // defined by subclass
         $this->options->overload('foo', function (Options $options, $previousValue) use ($test) {
-            /* @var \PHPUnit_Framework_TestCase $test */
+            /* @var TestCase $test */
             $test->assertEquals('bar', $previousValue);
 
             return 'dynamic';
@@ -102,7 +103,7 @@ public function testLazyOptionCanAccessOtherOptions()
         $this->options->set('foo', 'bar');
 
         $this->options->set('bam', function (Options $options) use ($test) {
-            /* @var \PHPUnit_Framework_TestCase $test */
+            /* @var TestCase $test */
             $test->assertEquals('bar', $options->get('foo'));
 
             return 'dynamic';
@@ -120,7 +121,7 @@ public function testLazyOptionCanAccessOtherLazyOptions()
         });
 
         $this->options->set('bam', function (Options $options) use ($test) {
-            /* @var \PHPUnit_Framework_TestCase $test */
+            /* @var TestCase $test */
             $test->assertEquals('bar', $options->get('foo'));
 
             return 'dynamic';
@@ -159,7 +160,7 @@ public function testNormalizerCanAccessOtherOptions()
         $this->options->set('bam', 'baz');
 
         $this->options->setNormalizer('bam', function (Options $options) use ($test) {
-            /* @var \PHPUnit_Framework_TestCase $test */
+            /* @var TestCase $test */
             $test->assertEquals('bar', $options->get('foo'));
 
             return 'normalized';
@@ -178,7 +179,7 @@ public function testNormalizerCanAccessOtherLazyOptions()
         $this->options->set('bam', 'baz');
 
         $this->options->setNormalizer('bam', function (Options $options) use ($test) {
-            /* @var \PHPUnit_Framework_TestCase $test */
+            /* @var TestCase $test */
             $test->assertEquals('bar', $options->get('foo'));
 
             return 'normalized';
diff --git a/src/Symfony/Component/OptionsResolver/Tests/OptionsResolver2Dot6Test.php b/src/Symfony/Component/OptionsResolver/Tests/OptionsResolver2Dot6Test.php
index 2dc4362375a4..6d9ddaf5713c 100644
--- a/src/Symfony/Component/OptionsResolver/Tests/OptionsResolver2Dot6Test.php
+++ b/src/Symfony/Component/OptionsResolver/Tests/OptionsResolver2Dot6Test.php
@@ -11,11 +11,13 @@
 
 namespace Symfony\Component\OptionsResolver\Tests;
 
+use PHPUnit\Framework\Assert;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\OptionsResolver\Exception\InvalidOptionsException;
 use Symfony\Component\OptionsResolver\Options;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 
-class OptionsResolver2Dot6Test extends \PHPUnit_Framework_TestCase
+class OptionsResolver2Dot6Test extends TestCase
 {
     /**
      * @var OptionsResolver
@@ -134,7 +136,7 @@ public function testSetLazyClosure()
     public function testClosureWithoutTypeHintNotInvoked()
     {
         $closure = function ($options) {
-            \PHPUnit_Framework_Assert::fail('Should not be called');
+            Assert::fail('Should not be called');
         };
 
         $this->resolver->setDefault('foo', $closure);
@@ -145,7 +147,7 @@ public function testClosureWithoutTypeHintNotInvoked()
     public function testClosureWithoutParametersNotInvoked()
     {
         $closure = function () {
-            \PHPUnit_Framework_Assert::fail('Should not be called');
+            Assert::fail('Should not be called');
         };
 
         $this->resolver->setDefault('foo', $closure);
@@ -160,7 +162,7 @@ public function testAccessPreviousDefaultValue()
 
         // defined by subclass
         $this->resolver->setDefault('foo', function (Options $options, $previousValue) {
-            \PHPUnit_Framework_Assert::assertEquals('bar', $previousValue);
+            Assert::assertEquals('bar', $previousValue);
 
             return 'lazy';
         });
@@ -177,7 +179,7 @@ public function testAccessPreviousLazyDefaultValue()
 
         // defined by subclass
         $this->resolver->setDefault('foo', function (Options $options, $previousValue) {
-            \PHPUnit_Framework_Assert::assertEquals('bar', $previousValue);
+            Assert::assertEquals('bar', $previousValue);
 
             return 'lazy';
         });
@@ -189,7 +191,7 @@ public function testPreviousValueIsNotEvaluatedIfNoSecondArgument()
     {
         // defined by superclass
         $this->resolver->setDefault('foo', function () {
-            \PHPUnit_Framework_Assert::fail('Should not be called');
+            Assert::fail('Should not be called');
         });
 
         // defined by subclass, no $previousValue argument defined!
@@ -203,7 +205,7 @@ public function testPreviousValueIsNotEvaluatedIfNoSecondArgument()
     public function testOverwrittenLazyOptionNotEvaluated()
     {
         $this->resolver->setDefault('foo', function (Options $options) {
-            \PHPUnit_Framework_Assert::fail('Should not be called');
+            Assert::fail('Should not be called');
         });
 
         $this->resolver->setDefault('foo', 'bar');
@@ -216,13 +218,13 @@ public function testInvokeEachLazyOptionOnlyOnce()
         $calls = 0;
 
         $this->resolver->setDefault('lazy1', function (Options $options) use (&$calls) {
-            \PHPUnit_Framework_Assert::assertSame(1, ++$calls);
+            Assert::assertSame(1, ++$calls);
 
             $options['lazy2'];
         });
 
         $this->resolver->setDefault('lazy2', function (Options $options) use (&$calls) {
-            \PHPUnit_Framework_Assert::assertSame(2, ++$calls);
+            Assert::assertSame(2, ++$calls);
         });
 
         $this->resolver->resolve();
@@ -996,7 +998,7 @@ public function testValidateTypeBeforeNormalization()
         $this->resolver->setAllowedTypes('foo', 'int');
 
         $this->resolver->setNormalizer('foo', function () {
-            \PHPUnit_Framework_Assert::fail('Should not be called.');
+            Assert::fail('Should not be called.');
         });
 
         $this->resolver->resolve();
@@ -1012,7 +1014,7 @@ public function testValidateValueBeforeNormalization()
         $this->resolver->setAllowedValues('foo', 'baz');
 
         $this->resolver->setNormalizer('foo', function () {
-            \PHPUnit_Framework_Assert::fail('Should not be called.');
+            Assert::fail('Should not be called.');
         });
 
         $this->resolver->resolve();
@@ -1024,8 +1026,8 @@ public function testNormalizerCanAccessOtherOptions()
         $this->resolver->setDefault('norm', 'baz');
 
         $this->resolver->setNormalizer('norm', function (Options $options) {
-            /* @var \PHPUnit_Framework_TestCase $test */
-            \PHPUnit_Framework_Assert::assertSame('bar', $options['default']);
+            /* @var TestCase $test */
+            Assert::assertSame('bar', $options['default']);
 
             return 'normalized';
         });
@@ -1044,8 +1046,8 @@ public function testNormalizerCanAccessLazyOptions()
         $this->resolver->setDefault('norm', 'baz');
 
         $this->resolver->setNormalizer('norm', function (Options $options) {
-            /* @var \PHPUnit_Framework_TestCase $test */
-            \PHPUnit_Framework_Assert::assertEquals('bar', $options['lazy']);
+            /* @var TestCase $test */
+            Assert::assertEquals('bar', $options['lazy']);
 
             return 'normalized';
         });
@@ -1151,12 +1153,12 @@ public function testInvokeEachNormalizerOnlyOnce()
         $this->resolver->setDefault('norm2', 'baz');
 
         $this->resolver->setNormalizer('norm1', function ($options) use (&$calls) {
-            \PHPUnit_Framework_Assert::assertSame(1, ++$calls);
+            Assert::assertSame(1, ++$calls);
 
             $options['norm2'];
         });
         $this->resolver->setNormalizer('norm2', function () use (&$calls) {
-            \PHPUnit_Framework_Assert::assertSame(2, ++$calls);
+            Assert::assertSame(2, ++$calls);
         });
 
         $this->resolver->resolve();
@@ -1169,7 +1171,7 @@ public function testNormalizerNotCalledForUnsetOptions()
         $this->resolver->setDefined('norm');
 
         $this->resolver->setNormalizer('norm', function () {
-            \PHPUnit_Framework_Assert::fail('Should not be called.');
+            Assert::fail('Should not be called.');
         });
 
         $this->assertEmpty($this->resolver->resolve());
@@ -1410,17 +1412,17 @@ public function testArrayAccess()
         });
 
         $this->resolver->setDefault('lazy2', function (Options $options) {
-            \PHPUnit_Framework_Assert::assertTrue(isset($options['default1']));
-            \PHPUnit_Framework_Assert::assertTrue(isset($options['default2']));
-            \PHPUnit_Framework_Assert::assertTrue(isset($options['required']));
-            \PHPUnit_Framework_Assert::assertTrue(isset($options['lazy1']));
-            \PHPUnit_Framework_Assert::assertTrue(isset($options['lazy2']));
-            \PHPUnit_Framework_Assert::assertFalse(isset($options['defined']));
-
-            \PHPUnit_Framework_Assert::assertSame(0, $options['default1']);
-            \PHPUnit_Framework_Assert::assertSame(42, $options['default2']);
-            \PHPUnit_Framework_Assert::assertSame('value', $options['required']);
-            \PHPUnit_Framework_Assert::assertSame('lazy', $options['lazy1']);
+            Assert::assertTrue(isset($options['default1']));
+            Assert::assertTrue(isset($options['default2']));
+            Assert::assertTrue(isset($options['required']));
+            Assert::assertTrue(isset($options['lazy1']));
+            Assert::assertTrue(isset($options['lazy2']));
+            Assert::assertFalse(isset($options['defined']));
+
+            Assert::assertSame(0, $options['default1']);
+            Assert::assertSame(42, $options['default2']);
+            Assert::assertSame('value', $options['required']);
+            Assert::assertSame('lazy', $options['lazy1']);
 
             // Obviously $options['lazy'] and $options['defined'] cannot be
             // accessed
@@ -1525,7 +1527,7 @@ public function testCount()
         $this->resolver->setDefault('lazy1', function () {});
 
         $this->resolver->setDefault('lazy2', function (Options $options) {
-            \PHPUnit_Framework_Assert::assertCount(4, $options);
+            Assert::assertCount(4, $options);
         });
 
         $this->assertCount(4, $this->resolver->resolve(array('required' => 'value')));
diff --git a/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php b/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php
index 0e97ae9b1781..3aaeb0fb8851 100644
--- a/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php
+++ b/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Process\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Process\ExecutableFinder;
 
 /**
  * @author Chris Smith <chris@cs278.org>
  */
-class ExecutableFinderTest extends \PHPUnit_Framework_TestCase
+class ExecutableFinderTest extends TestCase
 {
     private $path;
 
diff --git a/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php b/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php
index 28bafe38ea1c..23465e9e808d 100644
--- a/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php
+++ b/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Process\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Process\PhpExecutableFinder;
 
 /**
  * @author Robert Schönthal <seroscho@googlemail.com>
  */
-class PhpExecutableFinderTest extends \PHPUnit_Framework_TestCase
+class PhpExecutableFinderTest extends TestCase
 {
     /**
      * tests find() with the env var PHP_PATH.
diff --git a/src/Symfony/Component/Process/Tests/PhpProcessTest.php b/src/Symfony/Component/Process/Tests/PhpProcessTest.php
index f54623a5ec34..79ab02717a58 100644
--- a/src/Symfony/Component/Process/Tests/PhpProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/PhpProcessTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Process\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Process\PhpExecutableFinder;
 use Symfony\Component\Process\PhpProcess;
 
-class PhpProcessTest extends \PHPUnit_Framework_TestCase
+class PhpProcessTest extends TestCase
 {
     public function testNonBlockingWorks()
     {
diff --git a/src/Symfony/Component/Process/Tests/ProcessBuilderTest.php b/src/Symfony/Component/Process/Tests/ProcessBuilderTest.php
index 1b5056d1bb10..3faa50c551c7 100644
--- a/src/Symfony/Component/Process/Tests/ProcessBuilderTest.php
+++ b/src/Symfony/Component/Process/Tests/ProcessBuilderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Process\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Process\ProcessBuilder;
 
-class ProcessBuilderTest extends \PHPUnit_Framework_TestCase
+class ProcessBuilderTest extends TestCase
 {
     public function testInheritEnvironmentVars()
     {
diff --git a/src/Symfony/Component/Process/Tests/ProcessFailedExceptionTest.php b/src/Symfony/Component/Process/Tests/ProcessFailedExceptionTest.php
index c1feaa6ba9ae..11f2779420ce 100644
--- a/src/Symfony/Component/Process/Tests/ProcessFailedExceptionTest.php
+++ b/src/Symfony/Component/Process/Tests/ProcessFailedExceptionTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Process\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Process\Exception\ProcessFailedException;
 
 /**
  * @author Sebastian Marek <proofek@gmail.com>
  */
-class ProcessFailedExceptionTest extends \PHPUnit_Framework_TestCase
+class ProcessFailedExceptionTest extends TestCase
 {
     /**
      * tests ProcessFailedException throws exception if the process was successful.
diff --git a/src/Symfony/Component/Process/Tests/ProcessTest.php b/src/Symfony/Component/Process/Tests/ProcessTest.php
index f8608337a4a0..842dbf5b9ad1 100644
--- a/src/Symfony/Component/Process/Tests/ProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/ProcessTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Process\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Process\Exception\LogicException;
 use Symfony\Component\Process\Exception\ProcessTimedOutException;
 use Symfony\Component\Process\Exception\RuntimeException;
@@ -21,7 +22,7 @@
 /**
  * @author Robert Schönthal <seroscho@googlemail.com>
  */
-class ProcessTest extends \PHPUnit_Framework_TestCase
+class ProcessTest extends TestCase
 {
     private static $phpBin;
     private static $process;
diff --git a/src/Symfony/Component/Process/Tests/ProcessUtilsTest.php b/src/Symfony/Component/Process/Tests/ProcessUtilsTest.php
index 0f554b615180..cdcd3845caaa 100644
--- a/src/Symfony/Component/Process/Tests/ProcessUtilsTest.php
+++ b/src/Symfony/Component/Process/Tests/ProcessUtilsTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Process\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Process\ProcessUtils;
 
-class ProcessUtilsTest extends \PHPUnit_Framework_TestCase
+class ProcessUtilsTest extends TestCase
 {
     /**
      * @dataProvider dataArguments
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorArrayAccessTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorArrayAccessTest.php
index 07f44f19d8a1..b0ed69c85953 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorArrayAccessTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorArrayAccessTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\PropertyAccess\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyAccess\PropertyAccess;
 use Symfony\Component\PropertyAccess\PropertyAccessor;
 
-abstract class PropertyAccessorArrayAccessTest extends \PHPUnit_Framework_TestCase
+abstract class PropertyAccessorArrayAccessTest extends TestCase
 {
     /**
      * @var PropertyAccessor
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorBuilderTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorBuilderTest.php
index 951c6802f93b..f57433d875f5 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorBuilderTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorBuilderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\PropertyAccess\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyAccess\PropertyAccessorBuilder;
 
-class PropertyAccessorBuilderTest extends \PHPUnit_Framework_TestCase
+class PropertyAccessorBuilderTest extends TestCase
 {
     /**
      * @var PropertyAccessorBuilder
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
index a7e142e878e8..fc434adb45a0 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\PropertyAccess\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyAccess\Exception\NoSuchIndexException;
 use Symfony\Component\PropertyAccess\PropertyAccessor;
 use Symfony\Component\PropertyAccess\Tests\Fixtures\TestClass;
@@ -21,7 +22,7 @@
 use Symfony\Component\PropertyAccess\Tests\Fixtures\TestClassIsWritable;
 use Symfony\Component\PropertyAccess\Tests\Fixtures\TypeHinted;
 
-class PropertyAccessorTest extends \PHPUnit_Framework_TestCase
+class PropertyAccessorTest extends TestCase
 {
     /**
      * @var PropertyAccessor
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyPathBuilderTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyPathBuilderTest.php
index 6b4fdd8db982..75e9834ae85c 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyPathBuilderTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyPathBuilderTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\PropertyAccess\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyAccess\PropertyPath;
 use Symfony\Component\PropertyAccess\PropertyPathBuilder;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class PropertyPathBuilderTest extends \PHPUnit_Framework_TestCase
+class PropertyPathBuilderTest extends TestCase
 {
     /**
      * @var string
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyPathTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyPathTest.php
index aa8c1288b012..5e3a06a4b4d8 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyPathTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyPathTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\PropertyAccess\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyAccess\PropertyPath;
 
-class PropertyPathTest extends \PHPUnit_Framework_TestCase
+class PropertyPathTest extends TestCase
 {
     public function testToString()
     {
diff --git a/src/Symfony/Component/PropertyAccess/Tests/StringUtilTest.php b/src/Symfony/Component/PropertyAccess/Tests/StringUtilTest.php
index e6d0e5e908ba..e463ead43b6e 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/StringUtilTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/StringUtilTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\PropertyAccess\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyAccess\StringUtil;
 
-class StringUtilTest extends \PHPUnit_Framework_TestCase
+class StringUtilTest extends TestCase
 {
     public function singularifyProvider()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Annotation/RouteTest.php b/src/Symfony/Component/Routing/Tests/Annotation/RouteTest.php
index 3b340b33eeae..2a6f32ee75bf 100644
--- a/src/Symfony/Component/Routing/Tests/Annotation/RouteTest.php
+++ b/src/Symfony/Component/Routing/Tests/Annotation/RouteTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Routing\Tests\Annotation;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Annotation\Route;
 
-class RouteTest extends \PHPUnit_Framework_TestCase
+class RouteTest extends TestCase
 {
     /**
      * @expectedException \BadMethodCallException
diff --git a/src/Symfony/Component/Routing/Tests/CompiledRouteTest.php b/src/Symfony/Component/Routing/Tests/CompiledRouteTest.php
index 215ebb707bad..c55317958487 100644
--- a/src/Symfony/Component/Routing/Tests/CompiledRouteTest.php
+++ b/src/Symfony/Component/Routing/Tests/CompiledRouteTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Routing\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\CompiledRoute;
 
-class CompiledRouteTest extends \PHPUnit_Framework_TestCase
+class CompiledRouteTest extends TestCase
 {
     public function testAccessors()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php b/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php
index 4fc03ba64289..f84802b35b25 100644
--- a/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php
+++ b/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Routing\Tests\Generator\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\Generator\Dumper\PhpGeneratorDumper;
 use Symfony\Component\Routing\RequestContext;
 
-class PhpGeneratorDumperTest extends \PHPUnit_Framework_TestCase
+class PhpGeneratorDumperTest extends TestCase
 {
     /**
      * @var RouteCollection
diff --git a/src/Symfony/Component/Routing/Tests/Generator/UrlGeneratorTest.php b/src/Symfony/Component/Routing/Tests/Generator/UrlGeneratorTest.php
index 9f4090ff8609..36094ba49df8 100644
--- a/src/Symfony/Component/Routing/Tests/Generator/UrlGeneratorTest.php
+++ b/src/Symfony/Component/Routing/Tests/Generator/UrlGeneratorTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Routing\Tests\Generator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\Generator\UrlGenerator;
 use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 use Symfony\Component\Routing\RequestContext;
 
-class UrlGeneratorTest extends \PHPUnit_Framework_TestCase
+class UrlGeneratorTest extends TestCase
 {
     public function testAbsoluteUrlWithPort80()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Loader/AbstractAnnotationLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/AbstractAnnotationLoaderTest.php
index 288bf64ffaf7..e8bbe8fcf43e 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/AbstractAnnotationLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/AbstractAnnotationLoaderTest.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Routing\Tests\Loader;
 
-abstract class AbstractAnnotationLoaderTest extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+abstract class AbstractAnnotationLoaderTest extends TestCase
 {
     public function getReader()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Loader/ClosureLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/ClosureLoaderTest.php
index d34fa87ec533..5d963f86fb01 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/ClosureLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/ClosureLoaderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Routing\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Loader\ClosureLoader;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 
-class ClosureLoaderTest extends \PHPUnit_Framework_TestCase
+class ClosureLoaderTest extends TestCase
 {
     public function testSupports()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Loader/PhpFileLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/PhpFileLoaderTest.php
index ed7c5a4ba73d..bda64236f602 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/PhpFileLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/PhpFileLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Routing\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\Routing\Loader\PhpFileLoader;
 
-class PhpFileLoaderTest extends \PHPUnit_Framework_TestCase
+class PhpFileLoaderTest extends TestCase
 {
     public function testSupports()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php
index f2edebd584bf..354e8be0c41c 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Routing\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\Routing\Loader\XmlFileLoader;
 use Symfony\Component\Routing\Tests\Fixtures\CustomXmlFileLoader;
 
-class XmlFileLoaderTest extends \PHPUnit_Framework_TestCase
+class XmlFileLoaderTest extends TestCase
 {
     public function testSupports()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/YamlFileLoaderTest.php
index d3edc0849484..d94437f6cf03 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/YamlFileLoaderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Routing\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\Routing\Loader\YamlFileLoader;
 use Symfony\Component\Config\Resource\FileResource;
 
-class YamlFileLoaderTest extends \PHPUnit_Framework_TestCase
+class YamlFileLoaderTest extends TestCase
 {
     public function testSupports()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/DumperCollectionTest.php b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/DumperCollectionTest.php
index 7b6001c1f6d9..823efdb84002 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/DumperCollectionTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/DumperCollectionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Routing\Tests\Matcher\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Matcher\Dumper\DumperCollection;
 
-class DumperCollectionTest extends \PHPUnit_Framework_TestCase
+class DumperCollectionTest extends TestCase
 {
     public function testGetRoot()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/DumperPrefixCollectionTest.php b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/DumperPrefixCollectionTest.php
index de01a75d0b1b..e687b8a67d04 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/DumperPrefixCollectionTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/DumperPrefixCollectionTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Routing\Tests\Matcher\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\Matcher\Dumper\DumperPrefixCollection;
 use Symfony\Component\Routing\Matcher\Dumper\DumperRoute;
 use Symfony\Component\Routing\Matcher\Dumper\DumperCollection;
 
-class DumperPrefixCollectionTest extends \PHPUnit_Framework_TestCase
+class DumperPrefixCollectionTest extends TestCase
 {
     public function testAddPrefixRoute()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/LegacyApacheMatcherDumperTest.php b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/LegacyApacheMatcherDumperTest.php
index 4bf513e9a6b3..6f1b7dc981ed 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/LegacyApacheMatcherDumperTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/LegacyApacheMatcherDumperTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Routing\Tests\Matcher\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Routing\Matcher\Dumper\ApacheMatcherDumper;
@@ -18,7 +19,7 @@
 /**
  * @group legacy
  */
-class LegacyApacheMatcherDumperTest extends \PHPUnit_Framework_TestCase
+class LegacyApacheMatcherDumperTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/PhpMatcherDumperTest.php b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/PhpMatcherDumperTest.php
index 0b9cdc2331ea..cb3a1441656e 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/PhpMatcherDumperTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/PhpMatcherDumperTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Routing\Tests\Matcher\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Matcher\Dumper\PhpMatcherDumper;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 
-class PhpMatcherDumperTest extends \PHPUnit_Framework_TestCase
+class PhpMatcherDumperTest extends TestCase
 {
     /**
      * @expectedException \LogicException
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/LegacyApacheUrlMatcherTest.php b/src/Symfony/Component/Routing/Tests/Matcher/LegacyApacheUrlMatcherTest.php
index 931f910df4c5..0c5f73f3eacc 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/LegacyApacheUrlMatcherTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/LegacyApacheUrlMatcherTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Routing\Tests\Matcher;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Routing\RequestContext;
 use Symfony\Component\Routing\Matcher\ApacheUrlMatcher;
@@ -18,7 +19,7 @@
 /**
  * @group legacy
  */
-class LegacyApacheUrlMatcherTest extends \PHPUnit_Framework_TestCase
+class LegacyApacheUrlMatcherTest extends TestCase
 {
     protected $server;
 
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php b/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php
index b6c5a3e62218..ba4c6e972f19 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Routing\Tests\Matcher;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Routing\RequestContext;
 
-class RedirectableUrlMatcherTest extends \PHPUnit_Framework_TestCase
+class RedirectableUrlMatcherTest extends TestCase
 {
     public function testRedirectWhenNoSlash()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/TraceableUrlMatcherTest.php b/src/Symfony/Component/Routing/Tests/Matcher/TraceableUrlMatcherTest.php
index e43cbcb6bd14..9f0529e2de5d 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/TraceableUrlMatcherTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/TraceableUrlMatcherTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Routing\Tests\Matcher;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Routing\RequestContext;
 use Symfony\Component\Routing\Matcher\TraceableUrlMatcher;
 
-class TraceableUrlMatcherTest extends \PHPUnit_Framework_TestCase
+class TraceableUrlMatcherTest extends TestCase
 {
     public function test()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/UrlMatcherTest.php b/src/Symfony/Component/Routing/Tests/Matcher/UrlMatcherTest.php
index bf82fb7f86e6..8f7fbb07be96 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/UrlMatcherTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/UrlMatcherTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Routing\Tests\Matcher;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Exception\MethodNotAllowedException;
 use Symfony\Component\Routing\Exception\ResourceNotFoundException;
 use Symfony\Component\Routing\Matcher\UrlMatcher;
@@ -18,7 +19,7 @@
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Routing\RequestContext;
 
-class UrlMatcherTest extends \PHPUnit_Framework_TestCase
+class UrlMatcherTest extends TestCase
 {
     public function testNoMethodSoAllowed()
     {
diff --git a/src/Symfony/Component/Routing/Tests/RequestContextTest.php b/src/Symfony/Component/Routing/Tests/RequestContextTest.php
index 58612683ef13..ffe29d1a747c 100644
--- a/src/Symfony/Component/Routing/Tests/RequestContextTest.php
+++ b/src/Symfony/Component/Routing/Tests/RequestContextTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Routing\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\RequestContext;
 
-class RequestContextTest extends \PHPUnit_Framework_TestCase
+class RequestContextTest extends TestCase
 {
     public function testConstruct()
     {
diff --git a/src/Symfony/Component/Routing/Tests/RouteCollectionTest.php b/src/Symfony/Component/Routing/Tests/RouteCollectionTest.php
index 376b8db76fe4..83457ff14a7b 100644
--- a/src/Symfony/Component/Routing/Tests/RouteCollectionTest.php
+++ b/src/Symfony/Component/Routing/Tests/RouteCollectionTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Routing\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Config\Resource\FileResource;
 
-class RouteCollectionTest extends \PHPUnit_Framework_TestCase
+class RouteCollectionTest extends TestCase
 {
     public function testRoute()
     {
diff --git a/src/Symfony/Component/Routing/Tests/RouteCompilerTest.php b/src/Symfony/Component/Routing/Tests/RouteCompilerTest.php
index f08b9688a921..8d89dae0f4a9 100644
--- a/src/Symfony/Component/Routing/Tests/RouteCompilerTest.php
+++ b/src/Symfony/Component/Routing/Tests/RouteCompilerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Routing\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCompiler;
 
-class RouteCompilerTest extends \PHPUnit_Framework_TestCase
+class RouteCompilerTest extends TestCase
 {
     /**
      * @dataProvider provideCompileData
diff --git a/src/Symfony/Component/Routing/Tests/RouteTest.php b/src/Symfony/Component/Routing/Tests/RouteTest.php
index 85273a696a80..18c0206474a3 100644
--- a/src/Symfony/Component/Routing/Tests/RouteTest.php
+++ b/src/Symfony/Component/Routing/Tests/RouteTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Routing\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Route;
 
-class RouteTest extends \PHPUnit_Framework_TestCase
+class RouteTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Routing/Tests/RouterTest.php b/src/Symfony/Component/Routing/Tests/RouterTest.php
index fd418e1300e4..409959eec07d 100644
--- a/src/Symfony/Component/Routing/Tests/RouterTest.php
+++ b/src/Symfony/Component/Routing/Tests/RouterTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Routing\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Router;
 use Symfony\Component\HttpFoundation\Request;
 
-class RouterTest extends \PHPUnit_Framework_TestCase
+class RouterTest extends TestCase
 {
     private $router = null;
 
diff --git a/src/Symfony/Component/Security/Acl/Tests/Dbal/AclProviderBenchmarkTest.php b/src/Symfony/Component/Security/Acl/Tests/Dbal/AclProviderBenchmarkTest.php
index c95b474dca03..b5b4dab95f54 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Dbal/AclProviderBenchmarkTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Dbal/AclProviderBenchmarkTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Dbal;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Dbal\AclProvider;
 use Symfony\Component\Security\Acl\Domain\PermissionGrantingStrategy;
 use Symfony\Component\Security\Acl\Domain\ObjectIdentity;
@@ -20,7 +21,7 @@
 /**
  * @group benchmark
  */
-class AclProviderBenchmarkTest extends \PHPUnit_Framework_TestCase
+class AclProviderBenchmarkTest extends TestCase
 {
     /** @var \Doctrine\DBAL\Connection */
     protected $con;
diff --git a/src/Symfony/Component/Security/Acl/Tests/Dbal/AclProviderTest.php b/src/Symfony/Component/Security/Acl/Tests/Dbal/AclProviderTest.php
index 680c6c36d618..e0a47e7f0fd0 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Dbal/AclProviderTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Dbal/AclProviderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Dbal;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Dbal\AclProvider;
 use Symfony\Component\Security\Acl\Domain\PermissionGrantingStrategy;
 use Symfony\Component\Security\Acl\Domain\ObjectIdentity;
@@ -20,7 +21,7 @@
 /**
  * @requires extension pdo_sqlite
  */
-class AclProviderTest extends \PHPUnit_Framework_TestCase
+class AclProviderTest extends TestCase
 {
     protected $con;
     protected $insertClassStmt;
diff --git a/src/Symfony/Component/Security/Acl/Tests/Dbal/MutableAclProviderTest.php b/src/Symfony/Component/Security/Acl/Tests/Dbal/MutableAclProviderTest.php
index 6df2d79ccc29..e7de0b54875e 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Dbal/MutableAclProviderTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Dbal/MutableAclProviderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Dbal;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Domain\RoleSecurityIdentity;
 use Symfony\Component\Security\Acl\Model\FieldEntryInterface;
 use Symfony\Component\Security\Acl\Model\AuditableEntryInterface;
@@ -30,7 +31,7 @@
 /**
  * @requires extension pdo_sqlite
  */
-class MutableAclProviderTest extends \PHPUnit_Framework_TestCase
+class MutableAclProviderTest extends TestCase
 {
     protected $con;
 
diff --git a/src/Symfony/Component/Security/Acl/Tests/Domain/AclTest.php b/src/Symfony/Component/Security/Acl/Tests/Domain/AclTest.php
index bfe85e2e0b86..640859192d1b 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Domain/AclTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Domain/AclTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Domain;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Domain\UserSecurityIdentity;
 use Symfony\Component\Security\Acl\Domain\RoleSecurityIdentity;
 use Symfony\Component\Security\Acl\Domain\PermissionGrantingStrategy;
 use Symfony\Component\Security\Acl\Domain\ObjectIdentity;
 use Symfony\Component\Security\Acl\Domain\Acl;
 
-class AclTest extends \PHPUnit_Framework_TestCase
+class AclTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Security/Acl/Tests/Domain/AuditLoggerTest.php b/src/Symfony/Component/Security/Acl/Tests/Domain/AuditLoggerTest.php
index ae11474a35c2..630d217558ac 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Domain/AuditLoggerTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Domain/AuditLoggerTest.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Domain;
 
-class AuditLoggerTest extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class AuditLoggerTest extends TestCase
 {
     /**
      * @dataProvider getTestLogData
diff --git a/src/Symfony/Component/Security/Acl/Tests/Domain/DoctrineAclCacheTest.php b/src/Symfony/Component/Security/Acl/Tests/Domain/DoctrineAclCacheTest.php
index 255f7f4447e6..09164f2e6dc8 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Domain/DoctrineAclCacheTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Domain/DoctrineAclCacheTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Domain;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Domain\UserSecurityIdentity;
 use Symfony\Component\Security\Acl\Domain\ObjectIdentity;
 use Symfony\Component\Security\Acl\Domain\PermissionGrantingStrategy;
@@ -18,7 +19,7 @@
 use Symfony\Component\Security\Acl\Domain\DoctrineAclCache;
 use Doctrine\Common\Cache\ArrayCache;
 
-class DoctrineAclCacheTest extends \PHPUnit_Framework_TestCase
+class DoctrineAclCacheTest extends TestCase
 {
     protected $permissionGrantingStrategy;
 
diff --git a/src/Symfony/Component/Security/Acl/Tests/Domain/EntryTest.php b/src/Symfony/Component/Security/Acl/Tests/Domain/EntryTest.php
index 58f2786344c7..454f8ff5d35b 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Domain/EntryTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Domain/EntryTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Domain;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Domain\Entry;
 
-class EntryTest extends \PHPUnit_Framework_TestCase
+class EntryTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Security/Acl/Tests/Domain/FieldEntryTest.php b/src/Symfony/Component/Security/Acl/Tests/Domain/FieldEntryTest.php
index 55b083ca4c32..6f72f1ebb403 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Domain/FieldEntryTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Domain/FieldEntryTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Domain;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Domain\FieldEntry;
 
-class FieldEntryTest extends \PHPUnit_Framework_TestCase
+class FieldEntryTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Security/Acl/Tests/Domain/ObjectIdentityRetrievalStrategyTest.php b/src/Symfony/Component/Security/Acl/Tests/Domain/ObjectIdentityRetrievalStrategyTest.php
index 59fc3bdb7e37..a243f9a67c1c 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Domain/ObjectIdentityRetrievalStrategyTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Domain/ObjectIdentityRetrievalStrategyTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Domain;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Domain\ObjectIdentityRetrievalStrategy;
 
-class ObjectIdentityRetrievalStrategyTest extends \PHPUnit_Framework_TestCase
+class ObjectIdentityRetrievalStrategyTest extends TestCase
 {
     public function testGetObjectIdentityReturnsNullForInvalidDomainObject()
     {
diff --git a/src/Symfony/Component/Security/Acl/Tests/Domain/ObjectIdentityTest.php b/src/Symfony/Component/Security/Acl/Tests/Domain/ObjectIdentityTest.php
index 770ada7a7b1d..89782640c363 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Domain/ObjectIdentityTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Domain/ObjectIdentityTest.php
@@ -11,10 +11,12 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Domain
 {
+
+    use PHPUnit\Framework\TestCase;
     use Symfony\Component\Security\Acl\Domain\ObjectIdentity;
     use Symfony\Component\Security\Acl\Model\DomainObjectInterface;
 
-    class ObjectIdentityTest extends \PHPUnit_Framework_TestCase
+    class ObjectIdentityTest extends TestCase
     {
         public function testConstructor()
         {
diff --git a/src/Symfony/Component/Security/Acl/Tests/Domain/PermissionGrantingStrategyTest.php b/src/Symfony/Component/Security/Acl/Tests/Domain/PermissionGrantingStrategyTest.php
index 463f2c126c98..f77262654f12 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Domain/PermissionGrantingStrategyTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Domain/PermissionGrantingStrategyTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Domain;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Domain\ObjectIdentity;
 use Symfony\Component\Security\Acl\Domain\RoleSecurityIdentity;
 use Symfony\Component\Security\Acl\Domain\Acl;
@@ -18,7 +19,7 @@
 use Symfony\Component\Security\Acl\Domain\PermissionGrantingStrategy;
 use Symfony\Component\Security\Acl\Exception\NoAceFoundException;
 
-class PermissionGrantingStrategyTest extends \PHPUnit_Framework_TestCase
+class PermissionGrantingStrategyTest extends TestCase
 {
     public function testIsGrantedObjectAcesHavePriority()
     {
diff --git a/src/Symfony/Component/Security/Acl/Tests/Domain/RoleSecurityIdentityTest.php b/src/Symfony/Component/Security/Acl/Tests/Domain/RoleSecurityIdentityTest.php
index ad5f23639f17..2e67936cf4ab 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Domain/RoleSecurityIdentityTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Domain/RoleSecurityIdentityTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Domain;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Domain\UserSecurityIdentity;
 use Symfony\Component\Security\Core\Role\Role;
 use Symfony\Component\Security\Acl\Domain\RoleSecurityIdentity;
 
-class RoleSecurityIdentityTest extends \PHPUnit_Framework_TestCase
+class RoleSecurityIdentityTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Security/Acl/Tests/Domain/SecurityIdentityRetrievalStrategyTest.php b/src/Symfony/Component/Security/Acl/Tests/Domain/SecurityIdentityRetrievalStrategyTest.php
index 579a52e66ec8..2b5e35ecb7c3 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Domain/SecurityIdentityRetrievalStrategyTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Domain/SecurityIdentityRetrievalStrategyTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Domain;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Domain\RoleSecurityIdentity;
 use Symfony\Component\Security\Acl\Domain\UserSecurityIdentity;
 use Symfony\Component\Security\Acl\Domain\SecurityIdentityRetrievalStrategy;
 
-class SecurityIdentityRetrievalStrategyTest extends \PHPUnit_Framework_TestCase
+class SecurityIdentityRetrievalStrategyTest extends TestCase
 {
     /**
      * @dataProvider getSecurityIdentityRetrievalTests
diff --git a/src/Symfony/Component/Security/Acl/Tests/Domain/UserSecurityIdentityTest.php b/src/Symfony/Component/Security/Acl/Tests/Domain/UserSecurityIdentityTest.php
index 1eb52836bc84..613de22ada01 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Domain/UserSecurityIdentityTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Domain/UserSecurityIdentityTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Domain;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Domain\RoleSecurityIdentity;
 use Symfony\Component\Security\Acl\Domain\UserSecurityIdentity;
 
-class UserSecurityIdentityTest extends \PHPUnit_Framework_TestCase
+class UserSecurityIdentityTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Security/Acl/Tests/Permission/BasicPermissionMapTest.php b/src/Symfony/Component/Security/Acl/Tests/Permission/BasicPermissionMapTest.php
index 2afe588f038a..41eb5b27ab0c 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Permission/BasicPermissionMapTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Permission/BasicPermissionMapTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Permission;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Permission\BasicPermissionMap;
 
-class BasicPermissionMapTest extends \PHPUnit_Framework_TestCase
+class BasicPermissionMapTest extends TestCase
 {
     public function testGetMasksReturnsNullWhenNotSupportedMask()
     {
diff --git a/src/Symfony/Component/Security/Acl/Tests/Permission/MaskBuilderTest.php b/src/Symfony/Component/Security/Acl/Tests/Permission/MaskBuilderTest.php
index 824566918025..6e34e6d5e709 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Permission/MaskBuilderTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Permission/MaskBuilderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Permission;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Permission\MaskBuilder;
 
-class MaskBuilderTest extends \PHPUnit_Framework_TestCase
+class MaskBuilderTest extends TestCase
 {
     /**
      * @expectedException \InvalidArgumentException
diff --git a/src/Symfony/Component/Security/Acl/Tests/Voter/AclVoterTest.php b/src/Symfony/Component/Security/Acl/Tests/Voter/AclVoterTest.php
index bf8d6744acaa..508008d279b0 100644
--- a/src/Symfony/Component/Security/Acl/Tests/Voter/AclVoterTest.php
+++ b/src/Symfony/Component/Security/Acl/Tests/Voter/AclVoterTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Acl\Tests\Voter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Acl\Exception\NoAceFoundException;
 use Symfony\Component\Security\Acl\Voter\FieldVote;
 use Symfony\Component\Security\Acl\Exception\AclNotFoundException;
@@ -20,7 +21,7 @@
 use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
 use Symfony\Component\Security\Acl\Voter\AclVoter;
 
-class AclVoterTest extends \PHPUnit_Framework_TestCase
+class AclVoterTest extends TestCase
 {
     /**
      * @dataProvider getSupportsAttributeTests
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationProviderManagerTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationProviderManagerTest.php
index 274992ed049e..9b8105012c3d 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationProviderManagerTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationProviderManagerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\AuthenticationProviderManager;
 use Symfony\Component\Security\Core\Exception\ProviderNotFoundException;
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Core\Exception\AccountStatusException;
 use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
 
-class AuthenticationProviderManagerTest extends \PHPUnit_Framework_TestCase
+class AuthenticationProviderManagerTest extends TestCase
 {
     /**
      * @expectedException \InvalidArgumentException
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationTrustResolverTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationTrustResolverTest.php
index e3f7f5f18bb7..55ca05b43b5f 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationTrustResolverTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationTrustResolverTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\AuthenticationTrustResolver;
 
-class AuthenticationTrustResolverTest extends \PHPUnit_Framework_TestCase
+class AuthenticationTrustResolverTest extends TestCase
 {
     public function testIsAnonymous()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/AnonymousAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/AnonymousAuthenticationProviderTest.php
index 43eb62f3252a..b7fa4d6b5494 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/AnonymousAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/AnonymousAuthenticationProviderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Provider;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Provider\AnonymousAuthenticationProvider;
 
-class AnonymousAuthenticationProviderTest extends \PHPUnit_Framework_TestCase
+class AnonymousAuthenticationProviderTest extends TestCase
 {
     public function testSupports()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/DaoAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/DaoAuthenticationProviderTest.php
index 8edf1b02d450..85dafc1e9f8b 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/DaoAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/DaoAuthenticationProviderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Provider;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Encoder\PlaintextPasswordEncoder;
 use Symfony\Component\Security\Core\Authentication\Provider\DaoAuthenticationProvider;
 use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
 
-class DaoAuthenticationProviderTest extends \PHPUnit_Framework_TestCase
+class DaoAuthenticationProviderTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Security\Core\Exception\AuthenticationServiceException
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php
index 27d8566e6874..5a78d0ebb911 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Provider;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Provider\PreAuthenticatedAuthenticationProvider;
 use Symfony\Component\Security\Core\Exception\LockedException;
 
-class PreAuthenticatedAuthenticationProviderTest extends \PHPUnit_Framework_TestCase
+class PreAuthenticatedAuthenticationProviderTest extends TestCase
 {
     public function testSupports()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/RememberMeAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/RememberMeAuthenticationProviderTest.php
index ea30d5e3c71e..241076755e76 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/RememberMeAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/RememberMeAuthenticationProviderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Provider;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Provider\RememberMeAuthenticationProvider;
 use Symfony\Component\Security\Core\Exception\DisabledException;
 use Symfony\Component\Security\Core\Role\Role;
 
-class RememberMeAuthenticationProviderTest extends \PHPUnit_Framework_TestCase
+class RememberMeAuthenticationProviderTest extends TestCase
 {
     public function testSupports()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/UserAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/UserAuthenticationProviderTest.php
index 0a78ee8c77fa..50990b7e465f 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/UserAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/UserAuthenticationProviderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Provider;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Exception\AccountExpiredException;
 use Symfony\Component\Security\Core\Exception\BadCredentialsException;
 use Symfony\Component\Security\Core\Exception\CredentialsExpiredException;
@@ -18,7 +19,7 @@
 use Symfony\Component\Security\Core\Role\Role;
 use Symfony\Component\Security\Core\Role\SwitchUserRole;
 
-class UserAuthenticationProviderTest extends \PHPUnit_Framework_TestCase
+class UserAuthenticationProviderTest extends TestCase
 {
     public function testSupports()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/RememberMe/InMemoryTokenProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/RememberMe/InMemoryTokenProviderTest.php
index 3bdf38cff6fd..55905844681c 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/RememberMe/InMemoryTokenProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/RememberMe/InMemoryTokenProviderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\RememberMe;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\RememberMe\PersistentToken;
 use Symfony\Component\Security\Core\Authentication\RememberMe\InMemoryTokenProvider;
 
-class InMemoryTokenProviderTest extends \PHPUnit_Framework_TestCase
+class InMemoryTokenProviderTest extends TestCase
 {
     public function testCreateNewToken()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/RememberMe/PersistentTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/RememberMe/PersistentTokenTest.php
index 903c0309fc54..12c133f52df5 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/RememberMe/PersistentTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/RememberMe/PersistentTokenTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\RememberMe;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\RememberMe\PersistentToken;
 
-class PersistentTokenTest extends \PHPUnit_Framework_TestCase
+class PersistentTokenTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php
index 896ea37f1e94..57ebf184f2df 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Token;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Token\AbstractToken;
 use Symfony\Component\Security\Core\Role\Role;
 use Symfony\Component\Security\Core\Role\SwitchUserRole;
@@ -57,7 +58,8 @@ public function getCredentials()
     }
 }
 
-class AbstractTokenTest extends \PHPUnit_Framework_TestCase
+/** @noinspection PhpUndefinedClassInspection */
+class AbstractTokenTest extends TestCase
 {
     public function testGetUsername()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AnonymousTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AnonymousTokenTest.php
index b5cf00683aa5..f1902f03d0d5 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AnonymousTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AnonymousTokenTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Token;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Token\AnonymousToken;
 use Symfony\Component\Security\Core\Role\Role;
 
-class AnonymousTokenTest extends \PHPUnit_Framework_TestCase
+class AnonymousTokenTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/PreAuthenticatedTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/PreAuthenticatedTokenTest.php
index 77d260899643..5b2b1c07e664 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/PreAuthenticatedTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/PreAuthenticatedTokenTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Token;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken;
 use Symfony\Component\Security\Core\Role\Role;
 
-class PreAuthenticatedTokenTest extends \PHPUnit_Framework_TestCase
+class PreAuthenticatedTokenTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/RememberMeTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/RememberMeTokenTest.php
index 23b1a080f960..a5fcd62c4df5 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/RememberMeTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/RememberMeTokenTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Token;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Token\RememberMeToken;
 use Symfony\Component\Security\Core\Role\Role;
 
-class RememberMeTokenTest extends \PHPUnit_Framework_TestCase
+class RememberMeTokenTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/Storage/TokenStorageTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/Storage/TokenStorageTest.php
index a3bcc96fdf80..fd30eea3c57c 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/Storage/TokenStorageTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/Storage/TokenStorageTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Token\Storage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage;
 
-class TokenStorageTest extends \PHPUnit_Framework_TestCase
+class TokenStorageTest extends TestCase
 {
     public function testGetSetToken()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/UsernamePasswordTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/UsernamePasswordTokenTest.php
index 0297eff939ab..12897ab1d114 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/UsernamePasswordTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/UsernamePasswordTokenTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Token;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
 use Symfony\Component\Security\Core\Role\Role;
 
-class UsernamePasswordTokenTest extends \PHPUnit_Framework_TestCase
+class UsernamePasswordTokenTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/AccessDecisionManagerTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/AccessDecisionManagerTest.php
index e1fe0e2d7d43..e9790880e0e5 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/AccessDecisionManagerTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/AccessDecisionManagerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authorization;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authorization\AccessDecisionManager;
 use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
 
-class AccessDecisionManagerTest extends \PHPUnit_Framework_TestCase
+class AccessDecisionManagerTest extends TestCase
 {
     public function testSupportsClass()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/AuthorizationCheckerTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/AuthorizationCheckerTest.php
index eed361cbada9..ca28d53c5cc4 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/AuthorizationCheckerTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/AuthorizationCheckerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authorization;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage;
 use Symfony\Component\Security\Core\Authorization\AuthorizationChecker;
 
-class AuthorizationCheckerTest extends \PHPUnit_Framework_TestCase
+class AuthorizationCheckerTest extends TestCase
 {
     private $authenticationManager;
     private $accessDecisionManager;
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/ExpressionLanguageTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/ExpressionLanguageTest.php
index 5b4aca610a84..1565d1c86525 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/ExpressionLanguageTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/ExpressionLanguageTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authorization;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authorization\ExpressionLanguage;
 use Symfony\Component\Security\Core\Authentication\AuthenticationTrustResolver;
 use Symfony\Component\Security\Core\Authentication\Token\AnonymousToken;
@@ -18,7 +19,7 @@
 use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
 use Symfony\Component\Security\Core\User\User;
 
-class ExpressionLanguageTest extends \PHPUnit_Framework_TestCase
+class ExpressionLanguageTest extends TestCase
 {
     /**
      * @dataProvider provider
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AbstractVoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AbstractVoterTest.php
index 8d673bc0b293..d82d9d893e76 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AbstractVoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AbstractVoterTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authorization\Voter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authorization\Voter\AbstractVoter;
 use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
 
-class AbstractVoterTest extends \PHPUnit_Framework_TestCase
+class AbstractVoterTest extends TestCase
 {
     /**
      * @var TokenInterface
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AuthenticatedVoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AuthenticatedVoterTest.php
index a59848c79bb2..e34912ce0575 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AuthenticatedVoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AuthenticatedVoterTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authorization\Voter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\AuthenticationTrustResolver;
 use Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter;
 use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
 
-class AuthenticatedVoterTest extends \PHPUnit_Framework_TestCase
+class AuthenticatedVoterTest extends TestCase
 {
     public function testSupportsClass()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/ExpressionVoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/ExpressionVoterTest.php
index 07700396bf35..5f2b89112007 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/ExpressionVoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/ExpressionVoterTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authorization\Voter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authorization\Voter\ExpressionVoter;
 use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
 use Symfony\Component\Security\Core\Role\Role;
 
-class ExpressionVoterTest extends \PHPUnit_Framework_TestCase
+class ExpressionVoterTest extends TestCase
 {
     public function testSupportsAttribute()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleVoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleVoterTest.php
index ce4f4cf4fbcd..0b30a30c8f08 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleVoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleVoterTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authorization\Voter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authorization\Voter\RoleVoter;
 use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
 use Symfony\Component\Security\Core\Role\Role;
 
-class RoleVoterTest extends \PHPUnit_Framework_TestCase
+class RoleVoterTest extends TestCase
 {
     public function testSupportsClass()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php b/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php
index 40de8af218c3..10c8da692a6f 100644
--- a/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Core\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Encoder\BCryptPasswordEncoder;
 
 /**
  * @author Elnur Abdurrakhimov <elnur@elnur.pro>
  */
-class BCryptPasswordEncoderTest extends \PHPUnit_Framework_TestCase
+class BCryptPasswordEncoderTest extends TestCase
 {
     const PASSWORD = 'password';
     const BYTES = '0123456789abcdef';
diff --git a/src/Symfony/Component/Security/Core/Tests/Encoder/BasePasswordEncoderTest.php b/src/Symfony/Component/Security/Core/Tests/Encoder/BasePasswordEncoderTest.php
index 14c488bc109f..0742f421df56 100644
--- a/src/Symfony/Component/Security/Core/Tests/Encoder/BasePasswordEncoderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Encoder/BasePasswordEncoderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Core\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Encoder\BasePasswordEncoder;
 
 class PasswordEncoder extends BasePasswordEncoder
@@ -24,7 +25,7 @@ public function isPasswordValid($encoded, $raw, $salt)
     }
 }
 
-class BasePasswordEncoderTest extends \PHPUnit_Framework_TestCase
+class BasePasswordEncoderTest extends TestCase
 {
     public function testComparePassword()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Encoder/EncoderFactoryTest.php b/src/Symfony/Component/Security/Core/Tests/Encoder/EncoderFactoryTest.php
index 191a4d877059..926b1cc58eda 100644
--- a/src/Symfony/Component/Security/Core/Tests/Encoder/EncoderFactoryTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Encoder/EncoderFactoryTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Security\Core\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Encoder\MessageDigestPasswordEncoder;
 use Symfony\Component\Security\Core\Encoder\EncoderFactory;
 use Symfony\Component\Security\Core\Encoder\EncoderAwareInterface;
 use Symfony\Component\Security\Core\User\User;
 use Symfony\Component\Security\Core\User\UserInterface;
 
-class EncoderFactoryTest extends \PHPUnit_Framework_TestCase
+class EncoderFactoryTest extends TestCase
 {
     public function testGetEncoderWithMessageDigestEncoder()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Encoder/MessageDigestPasswordEncoderTest.php b/src/Symfony/Component/Security/Core/Tests/Encoder/MessageDigestPasswordEncoderTest.php
index 5189fff01851..c449194f8dda 100644
--- a/src/Symfony/Component/Security/Core/Tests/Encoder/MessageDigestPasswordEncoderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Encoder/MessageDigestPasswordEncoderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Encoder\MessageDigestPasswordEncoder;
 
-class MessageDigestPasswordEncoderTest extends \PHPUnit_Framework_TestCase
+class MessageDigestPasswordEncoderTest extends TestCase
 {
     public function testIsPasswordValid()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Encoder/Pbkdf2PasswordEncoderTest.php b/src/Symfony/Component/Security/Core/Tests/Encoder/Pbkdf2PasswordEncoderTest.php
index 3e9452b1a7f6..e65eef5bba4e 100644
--- a/src/Symfony/Component/Security/Core/Tests/Encoder/Pbkdf2PasswordEncoderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Encoder/Pbkdf2PasswordEncoderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Encoder\Pbkdf2PasswordEncoder;
 
-class Pbkdf2PasswordEncoderTest extends \PHPUnit_Framework_TestCase
+class Pbkdf2PasswordEncoderTest extends TestCase
 {
     public function testIsPasswordValid()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Encoder/PlaintextPasswordEncoderTest.php b/src/Symfony/Component/Security/Core/Tests/Encoder/PlaintextPasswordEncoderTest.php
index c7e0d2ad3840..1196651a8631 100644
--- a/src/Symfony/Component/Security/Core/Tests/Encoder/PlaintextPasswordEncoderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Encoder/PlaintextPasswordEncoderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Encoder\PlaintextPasswordEncoder;
 
-class PlaintextPasswordEncoderTest extends \PHPUnit_Framework_TestCase
+class PlaintextPasswordEncoderTest extends TestCase
 {
     public function testIsPasswordValid()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Encoder/UserPasswordEncoderTest.php b/src/Symfony/Component/Security/Core/Tests/Encoder/UserPasswordEncoderTest.php
index e8adb9b33dce..3328837ef1f7 100644
--- a/src/Symfony/Component/Security/Core/Tests/Encoder/UserPasswordEncoderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Encoder/UserPasswordEncoderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Encoder\UserPasswordEncoder;
 
-class UserPasswordEncoderTest extends \PHPUnit_Framework_TestCase
+class UserPasswordEncoderTest extends TestCase
 {
     public function testEncodePassword()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Exception/UsernameNotFoundExceptionTest.php b/src/Symfony/Component/Security/Core/Tests/Exception/UsernameNotFoundExceptionTest.php
index 98ea374c8184..b7e5c556d75a 100644
--- a/src/Symfony/Component/Security/Core/Tests/Exception/UsernameNotFoundExceptionTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Exception/UsernameNotFoundExceptionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Exception;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
 
-class UsernameNotFoundExceptionTest extends \PHPUnit_Framework_TestCase
+class UsernameNotFoundExceptionTest extends TestCase
 {
     public function testGetMessageData()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/LegacySecurityContextInterfaceTest.php b/src/Symfony/Component/Security/Core/Tests/LegacySecurityContextInterfaceTest.php
index a45ecf956dfa..04b2eca8d666 100644
--- a/src/Symfony/Component/Security/Core/Tests/LegacySecurityContextInterfaceTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/LegacySecurityContextInterfaceTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Security\Core\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\SecurityContextInterface;
 use Symfony\Component\Security\Core\Security;
 
 /**
  * @group legacy
  */
-class LegacySecurityContextInterfaceTest extends \PHPUnit_Framework_TestCase
+class LegacySecurityContextInterfaceTest extends TestCase
 {
     /**
      * Test if the BC Layer is working as intended.
diff --git a/src/Symfony/Component/Security/Core/Tests/LegacySecurityContextTest.php b/src/Symfony/Component/Security/Core/Tests/LegacySecurityContextTest.php
index f86fcad1c450..3661c7be9560 100644
--- a/src/Symfony/Component/Security/Core/Tests/LegacySecurityContextTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/LegacySecurityContextTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Core\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\SecurityContext;
 
 /**
  * @group legacy
  */
-class LegacySecurityContextTest extends \PHPUnit_Framework_TestCase
+class LegacySecurityContextTest extends TestCase
 {
     private $tokenStorage;
     private $authorizationChecker;
diff --git a/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
index dc38e4a776f0..74382135e2c8 100644
--- a/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Resources/TranslationFilesTest.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Security\Core\Tests\Resources;
 
-class TranslationFilesTest extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class TranslationFilesTest extends TestCase
 {
     /**
      * @dataProvider provideTranslationFiles
diff --git a/src/Symfony/Component/Security/Core/Tests/Role/RoleHierarchyTest.php b/src/Symfony/Component/Security/Core/Tests/Role/RoleHierarchyTest.php
index df1b6a3300ba..4d190cfc9482 100644
--- a/src/Symfony/Component/Security/Core/Tests/Role/RoleHierarchyTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Role/RoleHierarchyTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\Role;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Role\RoleHierarchy;
 use Symfony\Component\Security\Core\Role\Role;
 
-class RoleHierarchyTest extends \PHPUnit_Framework_TestCase
+class RoleHierarchyTest extends TestCase
 {
     public function testGetReachableRoles()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Role/RoleTest.php b/src/Symfony/Component/Security/Core/Tests/Role/RoleTest.php
index 02be07b2e072..edf779413b63 100644
--- a/src/Symfony/Component/Security/Core/Tests/Role/RoleTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Role/RoleTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Role;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Role\Role;
 
-class RoleTest extends \PHPUnit_Framework_TestCase
+class RoleTest extends TestCase
 {
     public function testGetRole()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Role/SwitchUserRoleTest.php b/src/Symfony/Component/Security/Core/Tests/Role/SwitchUserRoleTest.php
index fff5ff21f50c..e40471733ce1 100644
--- a/src/Symfony/Component/Security/Core/Tests/Role/SwitchUserRoleTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Role/SwitchUserRoleTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Role;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Role\SwitchUserRole;
 
-class SwitchUserRoleTest extends \PHPUnit_Framework_TestCase
+class SwitchUserRoleTest extends TestCase
 {
     public function testGetSource()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/User/ChainUserProviderTest.php b/src/Symfony/Component/Security/Core/Tests/User/ChainUserProviderTest.php
index dae58ae9add3..2f53cf924ca0 100644
--- a/src/Symfony/Component/Security/Core/Tests/User/ChainUserProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/User/ChainUserProviderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Core\Tests\User;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Exception\UnsupportedUserException;
 use Symfony\Component\Security\Core\User\ChainUserProvider;
 use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
 
-class ChainUserProviderTest extends \PHPUnit_Framework_TestCase
+class ChainUserProviderTest extends TestCase
 {
     public function testLoadUserByUsername()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/User/InMemoryUserProviderTest.php b/src/Symfony/Component/Security/Core/Tests/User/InMemoryUserProviderTest.php
index 0a1815f639ab..6647a76a1286 100644
--- a/src/Symfony/Component/Security/Core/Tests/User/InMemoryUserProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/User/InMemoryUserProviderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\User;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\User\InMemoryUserProvider;
 use Symfony\Component\Security\Core\User\User;
 
-class InMemoryUserProviderTest extends \PHPUnit_Framework_TestCase
+class InMemoryUserProviderTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/User/UserCheckerTest.php b/src/Symfony/Component/Security/Core/Tests/User/UserCheckerTest.php
index 4b6e52717e71..8ec34843eaae 100644
--- a/src/Symfony/Component/Security/Core/Tests/User/UserCheckerTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/User/UserCheckerTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\User;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\User\UserChecker;
 
-class UserCheckerTest extends \PHPUnit_Framework_TestCase
+class UserCheckerTest extends TestCase
 {
     public function testCheckPostAuthNotAdvancedUserInterface()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/User/UserTest.php b/src/Symfony/Component/Security/Core/Tests/User/UserTest.php
index b589b4af4513..fa9f33107d90 100644
--- a/src/Symfony/Component/Security/Core/Tests/User/UserTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/User/UserTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\User;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\User\User;
 
-class UserTest extends \PHPUnit_Framework_TestCase
+class UserTest extends TestCase
 {
     /**
      * @expectedException \InvalidArgumentException
diff --git a/src/Symfony/Component/Security/Core/Tests/Util/ClassUtilsTest.php b/src/Symfony/Component/Security/Core/Tests/Util/ClassUtilsTest.php
index e8f0143eb7b2..bd499b50e409 100644
--- a/src/Symfony/Component/Security/Core/Tests/Util/ClassUtilsTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Util/ClassUtilsTest.php
@@ -11,9 +11,11 @@
 
 namespace Symfony\Component\Security\Core\Tests\Util
 {
+
+    use PHPUnit\Framework\TestCase;
     use Symfony\Component\Security\Core\Util\ClassUtils;
 
-    class ClassUtilsTest extends \PHPUnit_Framework_TestCase
+    class ClassUtilsTest extends TestCase
     {
         public static function dataGetClass()
         {
diff --git a/src/Symfony/Component/Security/Core/Tests/Util/StringUtilsTest.php b/src/Symfony/Component/Security/Core/Tests/Util/StringUtilsTest.php
index faeaf259f72d..ebb694a3819d 100644
--- a/src/Symfony/Component/Security/Core/Tests/Util/StringUtilsTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Util/StringUtilsTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Core\Tests\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Util\StringUtils;
 
 /**
  * Data from PHP.net's hash_equals tests.
  */
-class StringUtilsTest extends \PHPUnit_Framework_TestCase
+class StringUtilsTest extends TestCase
 {
     public function dataProviderTrue()
     {
diff --git a/src/Symfony/Component/Security/Csrf/Tests/CsrfTokenManagerTest.php b/src/Symfony/Component/Security/Csrf/Tests/CsrfTokenManagerTest.php
index 16baec13659f..9ce35f4dea12 100644
--- a/src/Symfony/Component/Security/Csrf/Tests/CsrfTokenManagerTest.php
+++ b/src/Symfony/Component/Security/Csrf/Tests/CsrfTokenManagerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Security\Csrf\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Csrf\CsrfToken;
 use Symfony\Component\Security\Csrf\CsrfTokenManager;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class CsrfTokenManagerTest extends \PHPUnit_Framework_TestCase
+class CsrfTokenManagerTest extends TestCase
 {
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
diff --git a/src/Symfony/Component/Security/Csrf/Tests/TokenGenerator/UriSafeTokenGeneratorTest.php b/src/Symfony/Component/Security/Csrf/Tests/TokenGenerator/UriSafeTokenGeneratorTest.php
index afbaa7c9f864..287f9c20f695 100644
--- a/src/Symfony/Component/Security/Csrf/Tests/TokenGenerator/UriSafeTokenGeneratorTest.php
+++ b/src/Symfony/Component/Security/Csrf/Tests/TokenGenerator/UriSafeTokenGeneratorTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Csrf\Tests\TokenGenerator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Csrf\TokenGenerator\UriSafeTokenGenerator;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class UriSafeTokenGeneratorTest extends \PHPUnit_Framework_TestCase
+class UriSafeTokenGeneratorTest extends TestCase
 {
     const ENTROPY = 1000;
 
diff --git a/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/NativeSessionTokenStorageTest.php b/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/NativeSessionTokenStorageTest.php
index 7d3a537902f3..ea20cff5291f 100644
--- a/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/NativeSessionTokenStorageTest.php
+++ b/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/NativeSessionTokenStorageTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Csrf\Tests\TokenStorage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Csrf\TokenStorage\NativeSessionTokenStorage;
 
 /**
@@ -19,7 +20,7 @@
  * @runTestsInSeparateProcesses
  * @preserveGlobalState disabled
  */
-class NativeSessionTokenStorageTest extends \PHPUnit_Framework_TestCase
+class NativeSessionTokenStorageTest extends TestCase
 {
     const SESSION_NAMESPACE = 'foobar';
 
diff --git a/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/SessionTokenStorageTest.php b/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/SessionTokenStorageTest.php
index 0eac0a8aa060..c629ca15255f 100644
--- a/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/SessionTokenStorageTest.php
+++ b/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/SessionTokenStorageTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Csrf\Tests\TokenStorage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Csrf\TokenStorage\SessionTokenStorage;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class SessionTokenStorageTest extends \PHPUnit_Framework_TestCase
+class SessionTokenStorageTest extends TestCase
 {
     const SESSION_NAMESPACE = 'foobar';
 
diff --git a/src/Symfony/Component/Security/Http/Tests/AccessMapTest.php b/src/Symfony/Component/Security/Http/Tests/AccessMapTest.php
index b71ad8561cfd..822043d63c8c 100644
--- a/src/Symfony/Component/Security/Http/Tests/AccessMapTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/AccessMapTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Http\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\AccessMap;
 
-class AccessMapTest extends \PHPUnit_Framework_TestCase
+class AccessMapTest extends TestCase
 {
     public function testReturnsFirstMatchedPattern()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationFailureHandlerTest.php b/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationFailureHandlerTest.php
index da30aa9a683c..87fcdc78c76a 100644
--- a/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationFailureHandlerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationFailureHandlerTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Http\Tests\Authentication;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\Authentication\DefaultAuthenticationFailureHandler;
 use Symfony\Component\Security\Core\Security;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 
-class DefaultAuthenticationFailureHandlerTest extends \PHPUnit_Framework_TestCase
+class DefaultAuthenticationFailureHandlerTest extends TestCase
 {
     private $httpKernel = null;
 
diff --git a/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationSuccessHandlerTest.php b/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationSuccessHandlerTest.php
index 7166c53ffd63..2c133014cc13 100644
--- a/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationSuccessHandlerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationSuccessHandlerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Http\Tests\Authentication;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Security\Http\Authentication\DefaultAuthenticationSuccessHandler;
 
-class DefaultAuthenticationSuccessHandlerTest extends \PHPUnit_Framework_TestCase
+class DefaultAuthenticationSuccessHandlerTest extends TestCase
 {
     private $httpUtils = null;
 
diff --git a/src/Symfony/Component/Security/Http/Tests/Authentication/SimpleAuthenticationHandlerTest.php b/src/Symfony/Component/Security/Http/Tests/Authentication/SimpleAuthenticationHandlerTest.php
index 330b21a48823..4f73e5f44cdf 100644
--- a/src/Symfony/Component/Security/Http/Tests/Authentication/SimpleAuthenticationHandlerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Authentication/SimpleAuthenticationHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Http\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Security\Core\Authentication\SimpleAuthenticatorInterface;
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
@@ -18,7 +19,7 @@
 use Symfony\Component\Security\Http\Authentication\AuthenticationSuccessHandlerInterface;
 use Symfony\Component\Security\Http\Authentication\SimpleAuthenticationHandler;
 
-class SimpleAuthenticationHandlerTest extends \PHPUnit_Framework_TestCase
+class SimpleAuthenticationHandlerTest extends TestCase
 {
     private $successHandler;
 
diff --git a/src/Symfony/Component/Security/Http/Tests/EntryPoint/BasicAuthenticationEntryPointTest.php b/src/Symfony/Component/Security/Http/Tests/EntryPoint/BasicAuthenticationEntryPointTest.php
index 359c6de532ad..a089e90cc558 100644
--- a/src/Symfony/Component/Security/Http/Tests/EntryPoint/BasicAuthenticationEntryPointTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/EntryPoint/BasicAuthenticationEntryPointTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Http\Tests\EntryPoint;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\EntryPoint\BasicAuthenticationEntryPoint;
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
 
-class BasicAuthenticationEntryPointTest extends \PHPUnit_Framework_TestCase
+class BasicAuthenticationEntryPointTest extends TestCase
 {
     public function testStart()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/EntryPoint/DigestAuthenticationEntryPointTest.php b/src/Symfony/Component/Security/Http/Tests/EntryPoint/DigestAuthenticationEntryPointTest.php
index a3e035268a9d..0753ff3e17e6 100644
--- a/src/Symfony/Component/Security/Http/Tests/EntryPoint/DigestAuthenticationEntryPointTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/EntryPoint/DigestAuthenticationEntryPointTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Http\Tests\EntryPoint;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\EntryPoint\DigestAuthenticationEntryPoint;
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Core\Exception\NonceExpiredException;
 
-class DigestAuthenticationEntryPointTest extends \PHPUnit_Framework_TestCase
+class DigestAuthenticationEntryPointTest extends TestCase
 {
     public function testStart()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/EntryPoint/FormAuthenticationEntryPointTest.php b/src/Symfony/Component/Security/Http/Tests/EntryPoint/FormAuthenticationEntryPointTest.php
index 0247e5fc4b20..75bbd978f24c 100644
--- a/src/Symfony/Component/Security/Http/Tests/EntryPoint/FormAuthenticationEntryPointTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/EntryPoint/FormAuthenticationEntryPointTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Http\Tests\EntryPoint;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Security\Http\EntryPoint\FormAuthenticationEntryPoint;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 
-class FormAuthenticationEntryPointTest extends \PHPUnit_Framework_TestCase
+class FormAuthenticationEntryPointTest extends TestCase
 {
     public function testStart()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/EntryPoint/RetryAuthenticationEntryPointTest.php b/src/Symfony/Component/Security/Http/Tests/EntryPoint/RetryAuthenticationEntryPointTest.php
index ff5fbc297532..f2fa5bcf191a 100644
--- a/src/Symfony/Component/Security/Http/Tests/EntryPoint/RetryAuthenticationEntryPointTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/EntryPoint/RetryAuthenticationEntryPointTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Http\Tests\EntryPoint;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\EntryPoint\RetryAuthenticationEntryPoint;
 use Symfony\Component\HttpFoundation\Request;
 
-class RetryAuthenticationEntryPointTest extends \PHPUnit_Framework_TestCase
+class RetryAuthenticationEntryPointTest extends TestCase
 {
     /**
      * @dataProvider dataForStart
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/AbstractPreAuthenticatedListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/AbstractPreAuthenticatedListenerTest.php
index fa8a583e0c1b..dd7f75e67e22 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/AbstractPreAuthenticatedListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/AbstractPreAuthenticatedListenerTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken;
 use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
 
-class AbstractPreAuthenticatedListenerTest extends \PHPUnit_Framework_TestCase
+class AbstractPreAuthenticatedListenerTest extends TestCase
 {
     public function testHandleWithValidValues()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/AccessListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/AccessListenerTest.php
index 7f8eceaadde9..c49527bc14d6 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/AccessListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/AccessListenerTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\Firewall\AccessListener;
 
-class AccessListenerTest extends \PHPUnit_Framework_TestCase
+class AccessListenerTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Security\Core\Exception\AccessDeniedException
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/AnonymousAuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/AnonymousAuthenticationListenerTest.php
index c5761ac1e66c..6f9dcd4e47dc 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/AnonymousAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/AnonymousAuthenticationListenerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Token\AnonymousToken;
 use Symfony\Component\Security\Http\Firewall\AnonymousAuthenticationListener;
 
-class AnonymousAuthenticationListenerTest extends \PHPUnit_Framework_TestCase
+class AnonymousAuthenticationListenerTest extends TestCase
 {
     public function testHandleWithTokenStorageHavingAToken()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/BasicAuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/BasicAuthenticationListenerTest.php
index 62c23f619cb5..e71715f705a8 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/BasicAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/BasicAuthenticationListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken;
 use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
@@ -18,7 +19,7 @@
 use Symfony\Component\Security\Http\Firewall\BasicAuthenticationListener;
 use Symfony\Component\Security\Core\Authentication\AuthenticationProviderManager;
 
-class BasicAuthenticationListenerTest extends \PHPUnit_Framework_TestCase
+class BasicAuthenticationListenerTest extends TestCase
 {
     public function testHandleWithValidUsernameAndPasswordServerParameters()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/ChannelListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/ChannelListenerTest.php
index ae6c39f3b95b..53ff1dcf0e8e 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/ChannelListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/ChannelListenerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\Firewall\ChannelListener;
 use Symfony\Component\HttpFoundation\Response;
 
-class ChannelListenerTest extends \PHPUnit_Framework_TestCase
+class ChannelListenerTest extends TestCase
 {
     public function testHandleWithNotSecuredRequestAndHttpChannel()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/ContextListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/ContextListenerTest.php
index 5453b317de43..15bc8bda692b 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/ContextListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/ContextListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\Session\Session;
@@ -23,7 +24,7 @@
 use Symfony\Component\Security\Http\Firewall\ContextListener;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 
-class ContextListenerTest extends \PHPUnit_Framework_TestCase
+class ContextListenerTest extends TestCase
 {
     /**
      * @expectedException \InvalidArgumentException
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/DigestDataTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/DigestDataTest.php
index a7c8d49b81b5..2238a7418885 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/DigestDataTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/DigestDataTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\Firewall\DigestData;
 
-class DigestDataTest extends \PHPUnit_Framework_TestCase
+class DigestDataTest extends TestCase
 {
     public function testGetResponse()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/ExceptionListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/ExceptionListenerTest.php
index b372447d8b9b..271988c13ace 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/ExceptionListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/ExceptionListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
@@ -24,7 +25,7 @@
 use Symfony\Component\Security\Http\Firewall\ExceptionListener;
 use Symfony\Component\Security\Http\HttpUtils;
 
-class ExceptionListenerTest extends \PHPUnit_Framework_TestCase
+class ExceptionListenerTest extends TestCase
 {
     /**
      * @dataProvider getAuthenticationExceptionProvider
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/LogoutListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/LogoutListenerTest.php
index 0cc470606b8a..2a7660ac6502 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/LogoutListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/LogoutListenerTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Security\Http\Firewall\LogoutListener;
 
-class LogoutListenerTest extends \PHPUnit_Framework_TestCase
+class LogoutListenerTest extends TestCase
 {
     public function testHandleUnmatchedPath()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/RememberMeListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/RememberMeListenerTest.php
index 141b4cc2adf0..2249dcbd2059 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/RememberMeListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/RememberMeListenerTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Http\Firewall\RememberMeListener;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Security\Http\SecurityEvents;
 
-class RememberMeListenerTest extends \PHPUnit_Framework_TestCase
+class RememberMeListenerTest extends TestCase
 {
     public function testOnCoreSecurityDoesNotTryToPopulateNonEmptyTokenStorage()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/RemoteUserAuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/RemoteUserAuthenticationListenerTest.php
index 985152c770af..c02812f6ce5c 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/RemoteUserAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/RemoteUserAuthenticationListenerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Security\Http\Firewall\RemoteUserAuthenticationListener;
 
-class RemoteUserAuthenticationListenerTest extends \PHPUnit_Framework_TestCase
+class RemoteUserAuthenticationListenerTest extends TestCase
 {
     public function testGetPreAuthenticatedData()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/SimplePreAuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/SimplePreAuthenticationListenerTest.php
index 6061b12a8cff..4bcc1ee57aa9 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/SimplePreAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/SimplePreAuthenticationListenerTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Http\Event\InteractiveLoginEvent;
 use Symfony\Component\Security\Http\Firewall\SimplePreAuthenticationListener;
 use Symfony\Component\Security\Http\SecurityEvents;
 
-class SimplePreAuthenticationListenerTest extends \PHPUnit_Framework_TestCase
+class SimplePreAuthenticationListenerTest extends TestCase
 {
     private $authenticationManager;
     private $dispatcher;
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/SwitchUserListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/SwitchUserListenerTest.php
index b80f8c608fef..2c05ef75cab2 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/SwitchUserListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/SwitchUserListenerTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\Event\SwitchUserEvent;
 use Symfony\Component\Security\Http\Firewall\SwitchUserListener;
 use Symfony\Component\Security\Http\SecurityEvents;
 
-class SwitchUserListenerTest extends \PHPUnit_Framework_TestCase
+class SwitchUserListenerTest extends TestCase
 {
     private $tokenStorage;
 
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/X509AuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/X509AuthenticationListenerTest.php
index 3e58e69e0855..07206202ab2c 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/X509AuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/X509AuthenticationListenerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Security\Http\Firewall\X509AuthenticationListener;
 
-class X509AuthenticationListenerTest extends \PHPUnit_Framework_TestCase
+class X509AuthenticationListenerTest extends TestCase
 {
     /**
      * @dataProvider dataProviderGetPreAuthenticatedData
diff --git a/src/Symfony/Component/Security/Http/Tests/FirewallMapTest.php b/src/Symfony/Component/Security/Http/Tests/FirewallMapTest.php
index 016c72df45ae..2a62f21d33ad 100644
--- a/src/Symfony/Component/Security/Http/Tests/FirewallMapTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/FirewallMapTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Http\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\FirewallMap;
 use Symfony\Component\HttpFoundation\Request;
 
-class FirewallMapTest extends \PHPUnit_Framework_TestCase
+class FirewallMapTest extends TestCase
 {
     public function testGetListeners()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/FirewallTest.php b/src/Symfony/Component/Security/Http/Tests/FirewallTest.php
index 20da3ae31acd..bd475bb4e5b1 100644
--- a/src/Symfony/Component/Security/Http/Tests/FirewallTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/FirewallTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Http\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\Security\Http\Firewall;
 
-class FirewallTest extends \PHPUnit_Framework_TestCase
+class FirewallTest extends TestCase
 {
     public function testOnKernelRequestRegistersExceptionListener()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php b/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php
index bb432a0c52dc..eb0379f97b4f 100644
--- a/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Http\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Exception\MethodNotAllowedException;
 use Symfony\Component\Routing\Exception\ResourceNotFoundException;
@@ -18,7 +19,7 @@
 use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 use Symfony\Component\Security\Http\HttpUtils;
 
-class HttpUtilsTest extends \PHPUnit_Framework_TestCase
+class HttpUtilsTest extends TestCase
 {
     public function testCreateRedirectResponseWithPath()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Logout/CookieClearingLogoutHandlerTest.php b/src/Symfony/Component/Security/Http/Tests/Logout/CookieClearingLogoutHandlerTest.php
index 300f28dc6a65..0cc241b74a0a 100644
--- a/src/Symfony/Component/Security/Http/Tests/Logout/CookieClearingLogoutHandlerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Logout/CookieClearingLogoutHandlerTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Http\Tests\Logout;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\ResponseHeaderBag;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Security\Http\Logout\CookieClearingLogoutHandler;
 
-class CookieClearingLogoutHandlerTest extends \PHPUnit_Framework_TestCase
+class CookieClearingLogoutHandlerTest extends TestCase
 {
     public function testLogout()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Logout/DefaultLogoutSuccessHandlerTest.php b/src/Symfony/Component/Security/Http/Tests/Logout/DefaultLogoutSuccessHandlerTest.php
index 7f20f67b2b15..9936fc933957 100644
--- a/src/Symfony/Component/Security/Http/Tests/Logout/DefaultLogoutSuccessHandlerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Logout/DefaultLogoutSuccessHandlerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Http\Tests\Logout;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Security\Http\Logout\DefaultLogoutSuccessHandler;
 
-class DefaultLogoutSuccessHandlerTest extends \PHPUnit_Framework_TestCase
+class DefaultLogoutSuccessHandlerTest extends TestCase
 {
     public function testLogout()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Logout/SessionLogoutHandlerTest.php b/src/Symfony/Component/Security/Http/Tests/Logout/SessionLogoutHandlerTest.php
index 6a435d74baca..e32d46e3e577 100644
--- a/src/Symfony/Component/Security/Http/Tests/Logout/SessionLogoutHandlerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Logout/SessionLogoutHandlerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Security\Http\Tests\Logout;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Security\Http\Logout\SessionLogoutHandler;
 
-class SessionLogoutHandlerTest extends \PHPUnit_Framework_TestCase
+class SessionLogoutHandlerTest extends TestCase
 {
     public function testLogout()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php b/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php
index 259214c6df75..386927e3d50b 100644
--- a/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Http\Tests\RememberMe;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\RememberMe\RememberMeServicesInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Security\Http\RememberMe\AbstractRememberMeServices;
 
-class AbstractRememberMeServicesTest extends \PHPUnit_Framework_TestCase
+class AbstractRememberMeServicesTest extends TestCase
 {
     public function testGetRememberMeParameter()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/RememberMe/PersistentTokenBasedRememberMeServicesTest.php b/src/Symfony/Component/Security/Http/Tests/RememberMe/PersistentTokenBasedRememberMeServicesTest.php
index d7b55da8b23a..a042a6944993 100644
--- a/src/Symfony/Component/Security/Http/Tests/RememberMe/PersistentTokenBasedRememberMeServicesTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/RememberMe/PersistentTokenBasedRememberMeServicesTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Http\Tests\RememberMe;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\RememberMe\RememberMeServicesInterface;
 use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
 use Symfony\Component\Security\Core\Authentication\RememberMe\PersistentToken;
@@ -22,7 +23,7 @@
 use Symfony\Component\Security\Core\Exception\CookieTheftException;
 use Symfony\Component\Security\Core\Util\SecureRandom;
 
-class PersistentTokenBasedRememberMeServicesTest extends \PHPUnit_Framework_TestCase
+class PersistentTokenBasedRememberMeServicesTest extends TestCase
 {
     public static function setUpBeforeClass()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/RememberMe/ResponseListenerTest.php b/src/Symfony/Component/Security/Http/Tests/RememberMe/ResponseListenerTest.php
index 0db86e743399..42649ef5f657 100644
--- a/src/Symfony/Component/Security/Http/Tests/RememberMe/ResponseListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/RememberMe/ResponseListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Http\Tests\RememberMe;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\Security\Http\RememberMe\ResponseListener;
 use Symfony\Component\Security\Http\RememberMe\RememberMeServicesInterface;
@@ -19,7 +20,7 @@
 use Symfony\Component\HttpFoundation\Cookie;
 use Symfony\Component\HttpKernel\KernelEvents;
 
-class ResponseListenerTest extends \PHPUnit_Framework_TestCase
+class ResponseListenerTest extends TestCase
 {
     public function testRememberMeCookieIsSentWithResponse()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/RememberMe/TokenBasedRememberMeServicesTest.php b/src/Symfony/Component/Security/Http/Tests/RememberMe/TokenBasedRememberMeServicesTest.php
index 558825797dac..c06859df63a3 100644
--- a/src/Symfony/Component/Security/Http/Tests/RememberMe/TokenBasedRememberMeServicesTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/RememberMe/TokenBasedRememberMeServicesTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Http\Tests\RememberMe;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\RememberMe\RememberMeServicesInterface;
 use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
 use Symfony\Component\HttpFoundation\Request;
@@ -18,7 +19,7 @@
 use Symfony\Component\HttpFoundation\ResponseHeaderBag;
 use Symfony\Component\Security\Http\RememberMe\TokenBasedRememberMeServices;
 
-class TokenBasedRememberMeServicesTest extends \PHPUnit_Framework_TestCase
+class TokenBasedRememberMeServicesTest extends TestCase
 {
     public function testAutoLoginReturnsNullWhenNoCookie()
     {
diff --git a/src/Symfony/Component/Security/Http/Tests/Session/SessionAuthenticationStrategyTest.php b/src/Symfony/Component/Security/Http/Tests/Session/SessionAuthenticationStrategyTest.php
index c23821a4ce5f..601c3375887c 100644
--- a/src/Symfony/Component/Security/Http/Tests/Session/SessionAuthenticationStrategyTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Session/SessionAuthenticationStrategyTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Http\Tests\Session;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Http\Session\SessionAuthenticationStrategy;
 
-class SessionAuthenticationStrategyTest extends \PHPUnit_Framework_TestCase
+class SessionAuthenticationStrategyTest extends TestCase
 {
     public function testSessionIsNotChanged()
     {
diff --git a/src/Symfony/Component/Security/Tests/Http/Firewall/UsernamePasswordFormAuthenticationListenerTest.php b/src/Symfony/Component/Security/Tests/Http/Firewall/UsernamePasswordFormAuthenticationListenerTest.php
index 3e65b09b7db4..62b4c48f9276 100644
--- a/src/Symfony/Component/Security/Tests/Http/Firewall/UsernamePasswordFormAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Tests/Http/Firewall/UsernamePasswordFormAuthenticationListenerTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Security\Tests\Http\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Security\Http\Firewall\UsernamePasswordFormAuthenticationListener;
 use Symfony\Component\Security\Core\SecurityContextInterface;
 
-class UsernamePasswordFormAuthenticationListenerTest extends \PHPUnit_Framework_TestCase
+class UsernamePasswordFormAuthenticationListenerTest extends TestCase
 {
     /**
      * @dataProvider getUsernameForLength
diff --git a/src/Symfony/Component/Security/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Security/Tests/Resources/TranslationFilesTest.php
index 341ec87ea410..40a23d82ab6e 100644
--- a/src/Symfony/Component/Security/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Security/Tests/Resources/TranslationFilesTest.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Security\Tests\Resources;
 
-class TranslationFilesTest extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class TranslationFilesTest extends TestCase
 {
     /**
      * @dataProvider provideTranslationFiles
diff --git a/src/Symfony/Component/Security/Tests/TranslationSyncStatusTest.php b/src/Symfony/Component/Security/Tests/TranslationSyncStatusTest.php
index 4b72d41d5a5e..198d5b8eb624 100644
--- a/src/Symfony/Component/Security/Tests/TranslationSyncStatusTest.php
+++ b/src/Symfony/Component/Security/Tests/TranslationSyncStatusTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Finder;
 
-class TranslationSyncStatusTest extends \PHPUnit_Framework_TestCase
+class TranslationSyncStatusTest extends TestCase
 {
     /**
      * @dataProvider getTranslationDirectoriesData
diff --git a/src/Symfony/Component/Serializer/Tests/Annotation/GroupsTest.php b/src/Symfony/Component/Serializer/Tests/Annotation/GroupsTest.php
index 72b877729dc8..348ad1461914 100644
--- a/src/Symfony/Component/Serializer/Tests/Annotation/GroupsTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Annotation/GroupsTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Serializer\Tests\Annotation;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Annotation\Groups;
 
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class GroupsTest extends \PHPUnit_Framework_TestCase
+class GroupsTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Serializer\Exception\InvalidArgumentException
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncoderTest.php
index c064503430e8..ad8d57065f72 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncoderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Serializer\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Encoder\JsonEncoder;
 use Symfony\Component\Serializer\Serializer;
 use Symfony\Component\Serializer\Normalizer\CustomNormalizer;
 
-class JsonEncoderTest extends \PHPUnit_Framework_TestCase
+class JsonEncoderTest extends TestCase
 {
     private $encoder;
     private $serializer;
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/XmlEncoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/XmlEncoderTest.php
index 256ed2fc90f9..1c9ed79e35d6 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/XmlEncoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/XmlEncoderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Serializer\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Tests\Fixtures\Dummy;
 use Symfony\Component\Serializer\Tests\Fixtures\NormalizableTraversableDummy;
 use Symfony\Component\Serializer\Tests\Fixtures\ScalarDummy;
@@ -19,7 +20,7 @@
 use Symfony\Component\Serializer\Exception\UnexpectedValueException;
 use Symfony\Component\Serializer\Normalizer\CustomNormalizer;
 
-class XmlEncoderTest extends \PHPUnit_Framework_TestCase
+class XmlEncoderTest extends TestCase
 {
     private $encoder;
 
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/AttributeMetadataTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/AttributeMetadataTest.php
index 4a32831cb698..f08062369c70 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/AttributeMetadataTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/AttributeMetadataTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Serializer\Tests\Mapping;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Mapping\AttributeMetadata;
 
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class AttributeMetadataTest extends \PHPUnit_Framework_TestCase
+class AttributeMetadataTest extends TestCase
 {
     public function testInterface()
     {
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/ClassMetadataTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/ClassMetadataTest.php
index 9ce3d020bc1c..f2db1c51f6fc 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/ClassMetadataTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/ClassMetadataTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Serializer\Tests\Mapping;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Mapping\ClassMetadata;
 
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class ClassMetadataTest extends \PHPUnit_Framework_TestCase
+class ClassMetadataTest extends TestCase
 {
     public function testInterface()
     {
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/Factory/ClassMetadataFactoryTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/Factory/ClassMetadataFactoryTest.php
index 331aa3a25e1f..a95b7b177450 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/Factory/ClassMetadataFactoryTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/Factory/ClassMetadataFactoryTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Serializer\Tests\Mapping\Factory;
 
 use Doctrine\Common\Annotations\AnnotationReader;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactory;
 use Symfony\Component\Serializer\Mapping\Loader\AnnotationLoader;
 use Symfony\Component\Serializer\Mapping\Loader\LoaderChain;
@@ -20,7 +21,7 @@
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class ClassMetadataFactoryTest extends \PHPUnit_Framework_TestCase
+class ClassMetadataFactoryTest extends TestCase
 {
     public function testInterface()
     {
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/AnnotationLoaderTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/AnnotationLoaderTest.php
index 484d062f2237..d732ee721708 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/AnnotationLoaderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/AnnotationLoaderTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Serializer\Tests\Mapping\Loader;
 
 use Doctrine\Common\Annotations\AnnotationReader;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Mapping\ClassMetadata;
 use Symfony\Component\Serializer\Mapping\Loader\AnnotationLoader;
 use Symfony\Component\Serializer\Tests\Mapping\TestClassMetadataFactory;
@@ -19,7 +20,7 @@
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class AnnotationLoaderTest extends \PHPUnit_Framework_TestCase
+class AnnotationLoaderTest extends TestCase
 {
     /**
      * @var AnnotationLoader
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/XmlFileLoaderTest.php
index 6b468ff18189..a6cea9b980b0 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/XmlFileLoaderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Serializer\Tests\Mapping\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Mapping\Loader\XmlFileLoader;
 use Symfony\Component\Serializer\Mapping\ClassMetadata;
 use Symfony\Component\Serializer\Tests\Mapping\TestClassMetadataFactory;
@@ -18,7 +19,7 @@
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class XmlFileLoaderTest extends \PHPUnit_Framework_TestCase
+class XmlFileLoaderTest extends TestCase
 {
     /**
      * @var XmlFileLoader
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/YamlFileLoaderTest.php
index 72d146f9f522..caf7f4176669 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/YamlFileLoaderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Serializer\Tests\Mapping\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Mapping\Loader\YamlFileLoader;
 use Symfony\Component\Serializer\Mapping\ClassMetadata;
 use Symfony\Component\Serializer\Tests\Mapping\TestClassMetadataFactory;
@@ -18,7 +19,7 @@
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class YamlFileLoaderTest extends \PHPUnit_Framework_TestCase
+class YamlFileLoaderTest extends TestCase
 {
     /**
      * @var YamlFileLoader
diff --git a/src/Symfony/Component/Serializer/Tests/NameConverter/CamelCaseToSnakeCaseNameConverterTest.php b/src/Symfony/Component/Serializer/Tests/NameConverter/CamelCaseToSnakeCaseNameConverterTest.php
index 2d7131f2371d..b0dec5183976 100644
--- a/src/Symfony/Component/Serializer/Tests/NameConverter/CamelCaseToSnakeCaseNameConverterTest.php
+++ b/src/Symfony/Component/Serializer/Tests/NameConverter/CamelCaseToSnakeCaseNameConverterTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Serializer\Tests\NameConverter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\NameConverter\CamelCaseToSnakeCaseNameConverter;
 
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class CamelCaseToSnakeCaseNameConverterTest extends \PHPUnit_Framework_TestCase
+class CamelCaseToSnakeCaseNameConverterTest extends TestCase
 {
     public function testInterface()
     {
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractNormalizerTest.php
index 6f550369f663..bad7d3432176 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractNormalizerTest.php
@@ -2,6 +2,7 @@
 
 namespace Symfony\Component\Serializer\Tests\Normalizer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Mapping\AttributeMetadata;
 use Symfony\Component\Serializer\Mapping\ClassMetadata;
 use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactoryInterface;
@@ -15,7 +16,7 @@
  *
  * @author Konstantin S. M. Möllers <ksm.moellers@gmail.com>
  */
-class AbstractNormalizerTest extends \PHPUnit_Framework_TestCase
+class AbstractNormalizerTest extends TestCase
 {
     /**
      * @var AbstractNormalizerDummy
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php
index 86ae0031203b..10ebc2f9f2c7 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Serializer\Tests\Normalizer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Tests\Fixtures\ScalarDummy;
 use Symfony\Component\Serializer\Normalizer\CustomNormalizer;
 use Symfony\Component\Serializer\Serializer;
 
-class CustomNormalizerTest extends \PHPUnit_Framework_TestCase
+class CustomNormalizerTest extends TestCase
 {
     /**
      * @var CustomNormalizer
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
index f449bf430ee9..52b46b8f8f22 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Serializer\Tests\Normalizer;
 
 use Doctrine\Common\Annotations\AnnotationReader;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\NameConverter\CamelCaseToSnakeCaseNameConverter;
 use Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer;
 use Symfony\Component\Serializer\Serializer;
@@ -23,7 +24,7 @@
 use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactory;
 use Symfony\Component\Serializer\Tests\Fixtures\GroupDummy;
 
-class GetSetMethodNormalizerTest extends \PHPUnit_Framework_TestCase
+class GetSetMethodNormalizerTest extends TestCase
 {
     /**
      * @var GetSetMethodNormalizer
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
index 99141b52cdd4..88d051c32797 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Serializer\Tests\Normalizer;
 
 use Doctrine\Common\Annotations\AnnotationReader;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\NameConverter\CamelCaseToSnakeCaseNameConverter;
 use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
 use Symfony\Component\Serializer\Serializer;
@@ -26,7 +27,7 @@
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class ObjectNormalizerTest extends \PHPUnit_Framework_TestCase
+class ObjectNormalizerTest extends TestCase
 {
     /**
      * @var ObjectNormalizerTest
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php
index a0402c5a348e..d39c3dd196d3 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Serializer\Tests\Normalizer;
 
 use Doctrine\Common\Annotations\AnnotationReader;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactory;
 use Symfony\Component\Serializer\Mapping\Loader\AnnotationLoader;
 use Symfony\Component\Serializer\NameConverter\CamelCaseToSnakeCaseNameConverter;
@@ -22,7 +23,7 @@
 use Symfony\Component\Serializer\Tests\Fixtures\PropertyCircularReferenceDummy;
 use Symfony\Component\Serializer\Tests\Fixtures\PropertySiblingHolder;
 
-class PropertyNormalizerTest extends \PHPUnit_Framework_TestCase
+class PropertyNormalizerTest extends TestCase
 {
     /**
      * @var PropertyNormalizer
diff --git a/src/Symfony/Component/Serializer/Tests/SerializerTest.php b/src/Symfony/Component/Serializer/Tests/SerializerTest.php
index 05df5bc322f4..2f075c194fa4 100644
--- a/src/Symfony/Component/Serializer/Tests/SerializerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/SerializerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Serializer\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Serializer;
 use Symfony\Component\Serializer\Encoder\JsonEncoder;
 use Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer;
@@ -20,7 +21,7 @@
 use Symfony\Component\Serializer\Tests\Normalizer\TestNormalizer;
 use Symfony\Component\Serializer\Tests\Normalizer\TestDenormalizer;
 
-class SerializerTest extends \PHPUnit_Framework_TestCase
+class SerializerTest extends TestCase
 {
     public function testInterface()
     {
diff --git a/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php b/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php
index 1322d11e48ef..f2ee03979775 100644
--- a/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php
+++ b/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Stopwatch\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Stopwatch\StopwatchEvent;
 
 /**
@@ -20,7 +21,7 @@
  *
  * @group time-sensitive
  */
-class StopwatchEventTest extends \PHPUnit_Framework_TestCase
+class StopwatchEventTest extends TestCase
 {
     const DELTA = 37;
 
diff --git a/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php b/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php
index f0edf39e6983..f7d9171d8bc0 100644
--- a/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php
+++ b/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Stopwatch\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Stopwatch\Stopwatch;
 
 /**
@@ -20,7 +21,7 @@
  *
  * @group time-sensitive
  */
-class StopwatchTest extends \PHPUnit_Framework_TestCase
+class StopwatchTest extends TestCase
 {
     const DELTA = 20;
 
diff --git a/src/Symfony/Component/Templating/Tests/DelegatingEngineTest.php b/src/Symfony/Component/Templating/Tests/DelegatingEngineTest.php
index bf82ed51fcfc..19db0caef77c 100644
--- a/src/Symfony/Component/Templating/Tests/DelegatingEngineTest.php
+++ b/src/Symfony/Component/Templating/Tests/DelegatingEngineTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Templating\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\DelegatingEngine;
 use Symfony\Component\Templating\StreamingEngineInterface;
 use Symfony\Component\Templating\EngineInterface;
 
-class DelegatingEngineTest extends \PHPUnit_Framework_TestCase
+class DelegatingEngineTest extends TestCase
 {
     public function testRenderDelegatesToSupportedEngine()
     {
diff --git a/src/Symfony/Component/Templating/Tests/Helper/HelperTest.php b/src/Symfony/Component/Templating/Tests/Helper/HelperTest.php
index b0221f6dcbe9..8921ff19c81f 100644
--- a/src/Symfony/Component/Templating/Tests/Helper/HelperTest.php
+++ b/src/Symfony/Component/Templating/Tests/Helper/HelperTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Templating\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\Helper\Helper;
 
-class HelperTest extends \PHPUnit_Framework_TestCase
+class HelperTest extends TestCase
 {
     public function testGetSetCharset()
     {
diff --git a/src/Symfony/Component/Templating/Tests/Helper/LegacyAssetsHelperTest.php b/src/Symfony/Component/Templating/Tests/Helper/LegacyAssetsHelperTest.php
index d107e9ec4d2f..97fcf308b5a3 100644
--- a/src/Symfony/Component/Templating/Tests/Helper/LegacyAssetsHelperTest.php
+++ b/src/Symfony/Component/Templating/Tests/Helper/LegacyAssetsHelperTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Templating\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\Helper\AssetsHelper;
 
 /**
  * @group legacy
  */
-class LegacyAssetsHelperTest extends \PHPUnit_Framework_TestCase
+class LegacyAssetsHelperTest extends TestCase
 {
     public function testGetVersion()
     {
diff --git a/src/Symfony/Component/Templating/Tests/Helper/LegacyCoreAssetsHelperTest.php b/src/Symfony/Component/Templating/Tests/Helper/LegacyCoreAssetsHelperTest.php
index b6d7ce99289e..a90479bc55c2 100644
--- a/src/Symfony/Component/Templating/Tests/Helper/LegacyCoreAssetsHelperTest.php
+++ b/src/Symfony/Component/Templating/Tests/Helper/LegacyCoreAssetsHelperTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Templating\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\Helper\CoreAssetsHelper;
 
 /**
  * @group legacy
  */
-class LegacyCoreAssetsHelperTest extends \PHPUnit_Framework_TestCase
+class LegacyCoreAssetsHelperTest extends TestCase
 {
     protected $package;
 
diff --git a/src/Symfony/Component/Templating/Tests/Helper/SlotsHelperTest.php b/src/Symfony/Component/Templating/Tests/Helper/SlotsHelperTest.php
index ddaf462c0b29..c747072c606a 100644
--- a/src/Symfony/Component/Templating/Tests/Helper/SlotsHelperTest.php
+++ b/src/Symfony/Component/Templating/Tests/Helper/SlotsHelperTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Templating\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\Helper\SlotsHelper;
 
-class SlotsHelperTest extends \PHPUnit_Framework_TestCase
+class SlotsHelperTest extends TestCase
 {
     public function testHasGetSet()
     {
diff --git a/src/Symfony/Component/Templating/Tests/Loader/CacheLoaderTest.php b/src/Symfony/Component/Templating/Tests/Loader/CacheLoaderTest.php
index 344f3d07cf06..b4bf42b57240 100644
--- a/src/Symfony/Component/Templating/Tests/Loader/CacheLoaderTest.php
+++ b/src/Symfony/Component/Templating/Tests/Loader/CacheLoaderTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Templating\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\Loader\Loader;
 use Symfony\Component\Templating\Loader\CacheLoader;
 use Symfony\Component\Templating\Storage\StringStorage;
 use Symfony\Component\Templating\TemplateReferenceInterface;
 use Symfony\Component\Templating\TemplateReference;
 
-class CacheLoaderTest extends \PHPUnit_Framework_TestCase
+class CacheLoaderTest extends TestCase
 {
     public function testConstructor()
     {
diff --git a/src/Symfony/Component/Templating/Tests/Loader/ChainLoaderTest.php b/src/Symfony/Component/Templating/Tests/Loader/ChainLoaderTest.php
index 1521abd6ecc8..7e403995a075 100644
--- a/src/Symfony/Component/Templating/Tests/Loader/ChainLoaderTest.php
+++ b/src/Symfony/Component/Templating/Tests/Loader/ChainLoaderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Templating\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\Loader\ChainLoader;
 use Symfony\Component\Templating\Loader\FilesystemLoader;
 use Symfony\Component\Templating\TemplateReference;
 
-class ChainLoaderTest extends \PHPUnit_Framework_TestCase
+class ChainLoaderTest extends TestCase
 {
     protected $loader1;
     protected $loader2;
diff --git a/src/Symfony/Component/Templating/Tests/Loader/FilesystemLoaderTest.php b/src/Symfony/Component/Templating/Tests/Loader/FilesystemLoaderTest.php
index b7e119796072..04b93fb1c575 100644
--- a/src/Symfony/Component/Templating/Tests/Loader/FilesystemLoaderTest.php
+++ b/src/Symfony/Component/Templating/Tests/Loader/FilesystemLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Templating\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\Loader\FilesystemLoader;
 use Symfony\Component\Templating\TemplateReference;
 
-class FilesystemLoaderTest extends \PHPUnit_Framework_TestCase
+class FilesystemLoaderTest extends TestCase
 {
     protected static $fixturesPath;
 
diff --git a/src/Symfony/Component/Templating/Tests/Loader/LoaderTest.php b/src/Symfony/Component/Templating/Tests/Loader/LoaderTest.php
index b79dd618f929..690d259406bd 100644
--- a/src/Symfony/Component/Templating/Tests/Loader/LoaderTest.php
+++ b/src/Symfony/Component/Templating/Tests/Loader/LoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Templating\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\Loader\Loader;
 use Symfony\Component\Templating\TemplateReferenceInterface;
 
-class LoaderTest extends \PHPUnit_Framework_TestCase
+class LoaderTest extends TestCase
 {
     public function testGetSetLogger()
     {
diff --git a/src/Symfony/Component/Templating/Tests/PhpEngineTest.php b/src/Symfony/Component/Templating/Tests/PhpEngineTest.php
index fa0134aae1a9..d3d8c9885c41 100644
--- a/src/Symfony/Component/Templating/Tests/PhpEngineTest.php
+++ b/src/Symfony/Component/Templating/Tests/PhpEngineTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Templating\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\PhpEngine;
 use Symfony\Component\Templating\Loader\Loader;
 use Symfony\Component\Templating\Storage\StringStorage;
@@ -19,7 +20,7 @@
 use Symfony\Component\Templating\TemplateReferenceInterface;
 use Symfony\Component\Templating\TemplateReference;
 
-class PhpEngineTest extends \PHPUnit_Framework_TestCase
+class PhpEngineTest extends TestCase
 {
     protected $loader;
 
diff --git a/src/Symfony/Component/Templating/Tests/Storage/FileStorageTest.php b/src/Symfony/Component/Templating/Tests/Storage/FileStorageTest.php
index 3eaf3b76a9e9..ed3ca51d9dfa 100644
--- a/src/Symfony/Component/Templating/Tests/Storage/FileStorageTest.php
+++ b/src/Symfony/Component/Templating/Tests/Storage/FileStorageTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Templating\Tests\Storage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\Storage\FileStorage;
 
-class FileStorageTest extends \PHPUnit_Framework_TestCase
+class FileStorageTest extends TestCase
 {
     public function testGetContent()
     {
diff --git a/src/Symfony/Component/Templating/Tests/Storage/StorageTest.php b/src/Symfony/Component/Templating/Tests/Storage/StorageTest.php
index 341629a9b98b..3aac21dd7b66 100644
--- a/src/Symfony/Component/Templating/Tests/Storage/StorageTest.php
+++ b/src/Symfony/Component/Templating/Tests/Storage/StorageTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Templating\Tests\Storage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\Storage\Storage;
 
-class StorageTest extends \PHPUnit_Framework_TestCase
+class StorageTest extends TestCase
 {
     public function testMagicToString()
     {
diff --git a/src/Symfony/Component/Templating/Tests/Storage/StringStorageTest.php b/src/Symfony/Component/Templating/Tests/Storage/StringStorageTest.php
index e9b3e93ecda7..ecfeb800c858 100644
--- a/src/Symfony/Component/Templating/Tests/Storage/StringStorageTest.php
+++ b/src/Symfony/Component/Templating/Tests/Storage/StringStorageTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Templating\Tests\Storage;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\Storage\StringStorage;
 
-class StringStorageTest extends \PHPUnit_Framework_TestCase
+class StringStorageTest extends TestCase
 {
     public function testGetContent()
     {
diff --git a/src/Symfony/Component/Templating/Tests/TemplateNameParserTest.php b/src/Symfony/Component/Templating/Tests/TemplateNameParserTest.php
index afe73bc5baa5..14a019402fd3 100644
--- a/src/Symfony/Component/Templating/Tests/TemplateNameParserTest.php
+++ b/src/Symfony/Component/Templating/Tests/TemplateNameParserTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Templating\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Templating\TemplateNameParser;
 use Symfony\Component\Templating\TemplateReference;
 
-class TemplateNameParserTest extends \PHPUnit_Framework_TestCase
+class TemplateNameParserTest extends TestCase
 {
     protected $parser;
 
diff --git a/src/Symfony/Component/Translation/Tests/Catalogue/AbstractOperationTest.php b/src/Symfony/Component/Translation/Tests/Catalogue/AbstractOperationTest.php
index 30c21afa64c1..6fd909e878f7 100644
--- a/src/Symfony/Component/Translation/Tests/Catalogue/AbstractOperationTest.php
+++ b/src/Symfony/Component/Translation/Tests/Catalogue/AbstractOperationTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Catalogue;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\MessageCatalogueInterface;
 
-abstract class AbstractOperationTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractOperationTest extends TestCase
 {
     public function testGetEmptyDomains()
     {
diff --git a/src/Symfony/Component/Translation/Tests/DataCollector/TranslationDataCollectorTest.php b/src/Symfony/Component/Translation/Tests/DataCollector/TranslationDataCollectorTest.php
index 085d31267b3a..ba59ce8d1c2a 100644
--- a/src/Symfony/Component/Translation/Tests/DataCollector/TranslationDataCollectorTest.php
+++ b/src/Symfony/Component/Translation/Tests/DataCollector/TranslationDataCollectorTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\DataCollector;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\DataCollectorTranslator;
 use Symfony\Component\Translation\DataCollector\TranslationDataCollector;
 
-class TranslationDataCollectorTest extends \PHPUnit_Framework_TestCase
+class TranslationDataCollectorTest extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php b/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php
index af33f6c1f867..0cbf63a4063c 100644
--- a/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Translation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Translator;
 use Symfony\Component\Translation\DataCollectorTranslator;
 use Symfony\Component\Translation\Loader\ArrayLoader;
 
-class DataCollectorTranslatorTest extends \PHPUnit_Framework_TestCase
+class DataCollectorTranslatorTest extends TestCase
 {
     public function testCollectMessages()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/CsvFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/CsvFileDumperTest.php
index 29177ff5f590..39b1d64eb7d9 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/CsvFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/CsvFileDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Dumper\CsvFileDumper;
 
-class CsvFileDumperTest extends \PHPUnit_Framework_TestCase
+class CsvFileDumperTest extends TestCase
 {
     public function testDump()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/FileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/FileDumperTest.php
index bb2d9166ef7c..50830353127e 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/FileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/FileDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Dumper\FileDumper;
 
-class FileDumperTest extends \PHPUnit_Framework_TestCase
+class FileDumperTest extends TestCase
 {
     public function testDumpBackupsFileIfExisting()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/IcuResFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/IcuResFileDumperTest.php
index e12b59eb1f3d..5d2037c3f7ee 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/IcuResFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/IcuResFileDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Dumper\IcuResFileDumper;
 
-class IcuResFileDumperTest extends \PHPUnit_Framework_TestCase
+class IcuResFileDumperTest extends TestCase
 {
     /**
      * @requires extension mbstring
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/IniFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/IniFileDumperTest.php
index 2a2cefde1ef5..efbdfa2c29d8 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/IniFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/IniFileDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Dumper\IniFileDumper;
 
-class IniFileDumperTest extends \PHPUnit_Framework_TestCase
+class IniFileDumperTest extends TestCase
 {
     public function testDump()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/JsonFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/JsonFileDumperTest.php
index 697cd939f607..f54768418ca6 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/JsonFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/JsonFileDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Dumper\JsonFileDumper;
 
-class JsonFileDumperTest extends \PHPUnit_Framework_TestCase
+class JsonFileDumperTest extends TestCase
 {
     public function testDump()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/MoFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/MoFileDumperTest.php
index 439a25cd222f..6ac9b94002a0 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/MoFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/MoFileDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Dumper\MoFileDumper;
 
-class MoFileDumperTest extends \PHPUnit_Framework_TestCase
+class MoFileDumperTest extends TestCase
 {
     public function testDump()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/PhpFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/PhpFileDumperTest.php
index 18be5a0dc48a..5c5073c7eddb 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/PhpFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/PhpFileDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Dumper\PhpFileDumper;
 
-class PhpFileDumperTest extends \PHPUnit_Framework_TestCase
+class PhpFileDumperTest extends TestCase
 {
     public function testDump()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/PoFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/PoFileDumperTest.php
index 0296d6b2eaaa..03469770a331 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/PoFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/PoFileDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Dumper\PoFileDumper;
 
-class PoFileDumperTest extends \PHPUnit_Framework_TestCase
+class PoFileDumperTest extends TestCase
 {
     public function testDump()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/QtFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/QtFileDumperTest.php
index d7d8fb7e4698..3b7337d3f1cd 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/QtFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/QtFileDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Dumper\QtFileDumper;
 
-class QtFileDumperTest extends \PHPUnit_Framework_TestCase
+class QtFileDumperTest extends TestCase
 {
     public function testDump()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/XliffFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/XliffFileDumperTest.php
index dff2cc4c94a5..07411a0117ed 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/XliffFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/XliffFileDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Dumper\XliffFileDumper;
 
-class XliffFileDumperTest extends \PHPUnit_Framework_TestCase
+class XliffFileDumperTest extends TestCase
 {
     public function testDump()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/YamlFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/YamlFileDumperTest.php
index 3c68ade75311..ae036bc3e9d0 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/YamlFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/YamlFileDumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Dumper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Dumper\YamlFileDumper;
 
-class YamlFileDumperTest extends \PHPUnit_Framework_TestCase
+class YamlFileDumperTest extends TestCase
 {
     public function testDump()
     {
diff --git a/src/Symfony/Component/Translation/Tests/IdentityTranslatorTest.php b/src/Symfony/Component/Translation/Tests/IdentityTranslatorTest.php
index 648c54afd153..78288da40e15 100644
--- a/src/Symfony/Component/Translation/Tests/IdentityTranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/IdentityTranslatorTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Intl\Util\IntlTestHelper;
 use Symfony\Component\Translation\IdentityTranslator;
 
-class IdentityTranslatorTest extends \PHPUnit_Framework_TestCase
+class IdentityTranslatorTest extends TestCase
 {
     /**
      * @dataProvider getTransTests
diff --git a/src/Symfony/Component/Translation/Tests/IntervalTest.php b/src/Symfony/Component/Translation/Tests/IntervalTest.php
index 075c98b768f8..1bb3d210d79a 100644
--- a/src/Symfony/Component/Translation/Tests/IntervalTest.php
+++ b/src/Symfony/Component/Translation/Tests/IntervalTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Translation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Interval;
 
-class IntervalTest extends \PHPUnit_Framework_TestCase
+class IntervalTest extends TestCase
 {
     /**
      * @dataProvider getTests
diff --git a/src/Symfony/Component/Translation/Tests/Loader/CsvFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/CsvFileLoaderTest.php
index 463d3b50816f..27a4456e601f 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/CsvFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/CsvFileLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Loader\CsvFileLoader;
 use Symfony\Component\Config\Resource\FileResource;
 
-class CsvFileLoaderTest extends \PHPUnit_Framework_TestCase
+class CsvFileLoaderTest extends TestCase
 {
     public function testLoad()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Loader/IniFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/IniFileLoaderTest.php
index 1a5de0ed58d6..dbf22d10347a 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/IniFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/IniFileLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Loader\IniFileLoader;
 use Symfony\Component\Config\Resource\FileResource;
 
-class IniFileLoaderTest extends \PHPUnit_Framework_TestCase
+class IniFileLoaderTest extends TestCase
 {
     public function testLoad()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Loader/JsonFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/JsonFileLoaderTest.php
index cd5d6339f7b4..46261b666fbb 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/JsonFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/JsonFileLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Loader\JsonFileLoader;
 use Symfony\Component\Config\Resource\FileResource;
 
-class JsonFileLoaderTest extends \PHPUnit_Framework_TestCase
+class JsonFileLoaderTest extends TestCase
 {
     public function testLoad()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Loader/LocalizedTestCase.php b/src/Symfony/Component/Translation/Tests/Loader/LocalizedTestCase.php
index 0d1fff7ac490..a655c69d2e72 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/LocalizedTestCase.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/LocalizedTestCase.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Translation\Tests\Loader;
 
-abstract class LocalizedTestCase extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+abstract class LocalizedTestCase extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Loader/MoFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/MoFileLoaderTest.php
index 34078d0a9e48..b9f754fcf0da 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/MoFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/MoFileLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Loader\MoFileLoader;
 use Symfony\Component\Config\Resource\FileResource;
 
-class MoFileLoaderTest extends \PHPUnit_Framework_TestCase
+class MoFileLoaderTest extends TestCase
 {
     public function testLoad()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Loader/PhpFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/PhpFileLoaderTest.php
index 0816b0f8549d..9fc83e34f99a 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/PhpFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/PhpFileLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Loader\PhpFileLoader;
 use Symfony\Component\Config\Resource\FileResource;
 
-class PhpFileLoaderTest extends \PHPUnit_Framework_TestCase
+class PhpFileLoaderTest extends TestCase
 {
     public function testLoad()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Loader/PoFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/PoFileLoaderTest.php
index 5d340c766f23..884dec9a65f6 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/PoFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/PoFileLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Loader\PoFileLoader;
 use Symfony\Component\Config\Resource\FileResource;
 
-class PoFileLoaderTest extends \PHPUnit_Framework_TestCase
+class PoFileLoaderTest extends TestCase
 {
     public function testLoad()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Loader/QtFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/QtFileLoaderTest.php
index 3aca86a53ed6..a8d04d6f2874 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/QtFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/QtFileLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Loader\QtFileLoader;
 use Symfony\Component\Config\Resource\FileResource;
 
-class QtFileLoaderTest extends \PHPUnit_Framework_TestCase
+class QtFileLoaderTest extends TestCase
 {
     public function testLoad()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Loader/XliffFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/XliffFileLoaderTest.php
index ba135af6cbcd..1dc6ec38faf9 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/XliffFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/XliffFileLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Loader\XliffFileLoader;
 use Symfony\Component\Config\Resource\FileResource;
 
-class XliffFileLoaderTest extends \PHPUnit_Framework_TestCase
+class XliffFileLoaderTest extends TestCase
 {
     public function testLoad()
     {
diff --git a/src/Symfony/Component/Translation/Tests/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/YamlFileLoaderTest.php
index 00f7163468d5..e1ba514b3f75 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/YamlFileLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Translation\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Loader\YamlFileLoader;
 use Symfony\Component\Config\Resource\FileResource;
 
-class YamlFileLoaderTest extends \PHPUnit_Framework_TestCase
+class YamlFileLoaderTest extends TestCase
 {
     public function testLoad()
     {
diff --git a/src/Symfony/Component/Translation/Tests/LoggingTranslatorTest.php b/src/Symfony/Component/Translation/Tests/LoggingTranslatorTest.php
index 66e9d587dedf..891230a2ded2 100644
--- a/src/Symfony/Component/Translation/Tests/LoggingTranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/LoggingTranslatorTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Translation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Translator;
 use Symfony\Component\Translation\LoggingTranslator;
 use Symfony\Component\Translation\Loader\ArrayLoader;
 
-class LoggingTranslatorTest extends \PHPUnit_Framework_TestCase
+class LoggingTranslatorTest extends TestCase
 {
     public function testTransWithNoTranslationIsLogged()
     {
diff --git a/src/Symfony/Component/Translation/Tests/MessageCatalogueTest.php b/src/Symfony/Component/Translation/Tests/MessageCatalogueTest.php
index eb18dae0a1e7..e85af944fcb5 100644
--- a/src/Symfony/Component/Translation/Tests/MessageCatalogueTest.php
+++ b/src/Symfony/Component/Translation/Tests/MessageCatalogueTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Translation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageCatalogue;
 
-class MessageCatalogueTest extends \PHPUnit_Framework_TestCase
+class MessageCatalogueTest extends TestCase
 {
     public function testGetLocale()
     {
diff --git a/src/Symfony/Component/Translation/Tests/MessageSelectorTest.php b/src/Symfony/Component/Translation/Tests/MessageSelectorTest.php
index f89bed16d59b..9d68749428f4 100644
--- a/src/Symfony/Component/Translation/Tests/MessageSelectorTest.php
+++ b/src/Symfony/Component/Translation/Tests/MessageSelectorTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Translation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\MessageSelector;
 
-class MessageSelectorTest extends \PHPUnit_Framework_TestCase
+class MessageSelectorTest extends TestCase
 {
     /**
      * @dataProvider getChooseTests
diff --git a/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php b/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php
index 78bbc87eece4..8e499fd6edac 100644
--- a/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php
+++ b/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Translation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\PluralizationRules;
 
 /**
@@ -26,7 +27,7 @@
  *
  * @author Clemens Tolboom clemens@build2be.nl
  */
-class PluralizationRulesTest extends \PHPUnit_Framework_TestCase
+class PluralizationRulesTest extends TestCase
 {
     /**
      * We test failed langcode here.
diff --git a/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php b/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php
index fa3451b2cac1..ea272b9eae1e 100644
--- a/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php
+++ b/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Translation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Resource\ResourceInterface;
 use Symfony\Component\Translation\Loader\ArrayLoader;
 use Symfony\Component\Translation\Loader\LoaderInterface;
 use Symfony\Component\Translation\Translator;
 use Symfony\Component\Translation\MessageCatalogue;
 
-class TranslatorCacheTest extends \PHPUnit_Framework_TestCase
+class TranslatorCacheTest extends TestCase
 {
     protected $tmpDir;
 
diff --git a/src/Symfony/Component/Translation/Tests/TranslatorTest.php b/src/Symfony/Component/Translation/Tests/TranslatorTest.php
index 8756844b467c..f02eb57b358f 100644
--- a/src/Symfony/Component/Translation/Tests/TranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/TranslatorTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Translation\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Translator;
 use Symfony\Component\Translation\MessageSelector;
 use Symfony\Component\Translation\Loader\ArrayLoader;
 use Symfony\Component\Translation\MessageCatalogue;
 
-class TranslatorTest extends \PHPUnit_Framework_TestCase
+class TranslatorTest extends TestCase
 {
     /**
      * @dataProvider      getInvalidLocalesTests
diff --git a/src/Symfony/Component/Translation/Tests/Writer/TranslationWriterTest.php b/src/Symfony/Component/Translation/Tests/Writer/TranslationWriterTest.php
index 041a83679a08..2d2aec7c8a05 100644
--- a/src/Symfony/Component/Translation/Tests/Writer/TranslationWriterTest.php
+++ b/src/Symfony/Component/Translation/Tests/Writer/TranslationWriterTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Translation\Tests\Writer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Dumper\DumperInterface;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Writer\TranslationWriter;
 
-class TranslationWriterTest extends \PHPUnit_Framework_TestCase
+class TranslationWriterTest extends TestCase
 {
     public function testWriteTranslations()
     {
diff --git a/src/Symfony/Component/Validator/Tests/ConstraintTest.php b/src/Symfony/Component/Validator/Tests/ConstraintTest.php
index d473f14f651a..b16536883278 100644
--- a/src/Symfony/Component/Validator/Tests/ConstraintTest.php
+++ b/src/Symfony/Component/Validator/Tests/ConstraintTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Validator\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\Tests\Fixtures\ClassConstraint;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintA;
@@ -19,7 +20,7 @@
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintWithValue;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintWithValueAsDefault;
 
-class ConstraintTest extends \PHPUnit_Framework_TestCase
+class ConstraintTest extends TestCase
 {
     public function testSetProperties()
     {
diff --git a/src/Symfony/Component/Validator/Tests/ConstraintViolationListTest.php b/src/Symfony/Component/Validator/Tests/ConstraintViolationListTest.php
index 18ec52d7a417..6f4518cab39e 100644
--- a/src/Symfony/Component/Validator/Tests/ConstraintViolationListTest.php
+++ b/src/Symfony/Component/Validator/Tests/ConstraintViolationListTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Validator\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\ConstraintViolation;
 use Symfony\Component\Validator\ConstraintViolationList;
 
-class ConstraintViolationListTest extends \PHPUnit_Framework_TestCase
+class ConstraintViolationListTest extends TestCase
 {
     protected $list;
 
diff --git a/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php b/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php
index 5ea35195412f..cef4782e0f82 100644
--- a/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php
+++ b/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Validator\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\ConstraintViolation;
 
-class ConstraintViolationTest extends \PHPUnit_Framework_TestCase
+class ConstraintViolationTest extends TestCase
 {
     public function testToStringHandlesArrays()
     {
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/AbstractConstraintValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/AbstractConstraintValidatorTest.php
index 3a6fa5f6786b..73cdb53d297b 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/AbstractConstraintValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/AbstractConstraintValidatorTest.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\Validator\Tests\Constraints;
 
+use PHPUnit\Framework\Assert;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\Constraints\NotNull;
 use Symfony\Component\Validator\ConstraintValidatorInterface;
@@ -26,7 +28,7 @@
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-abstract class AbstractConstraintValidatorTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractConstraintValidatorTest extends TestCase
 {
     /**
      * @var ExecutionContextInterface
@@ -411,12 +413,12 @@ public function assertRaised()
 
         $violations = iterator_to_array($this->context->getViolations());
 
-        \PHPUnit_Framework_Assert::assertSame($expectedCount = count($expected), $violationsCount = count($violations), sprintf('%u violation(s) expected. Got %u.', $expectedCount, $violationsCount));
+        Assert::assertSame($expectedCount = count($expected), $violationsCount = count($violations), sprintf('%u violation(s) expected. Got %u.', $expectedCount, $violationsCount));
 
         reset($violations);
 
         foreach ($expected as $violation) {
-            \PHPUnit_Framework_Assert::assertEquals($violation, current($violations));
+            Assert::assertEquals($violation, current($violations));
             next($violations);
         }
     }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/AllTest.php b/src/Symfony/Component/Validator/Tests/Constraints/AllTest.php
index 36b5198b0b2f..25e71a1b44dc 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/AllTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/AllTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Validator\Tests\Constraints;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\All;
 use Symfony\Component\Validator\Constraints\Valid;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class AllTest extends \PHPUnit_Framework_TestCase
+class AllTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Validator\Exception\ConstraintDefinitionException
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CollectionTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CollectionTest.php
index 79f50b0b5b58..b5fbf6c0b097 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CollectionTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CollectionTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Validator\Tests\Constraints;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\Collection;
 use Symfony\Component\Validator\Constraints\Email;
 use Symfony\Component\Validator\Constraints\Optional;
@@ -20,7 +21,7 @@
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class CollectionTest extends \PHPUnit_Framework_TestCase
+class CollectionTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Validator\Exception\ConstraintDefinitionException
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php
index 002b1336aab3..6a8530723fb0 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Validator\Tests\Constraints;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\Composite;
 use Symfony\Component\Validator\Constraints\NotBlank;
 use Symfony\Component\Validator\Constraints\NotNull;
@@ -34,7 +35,7 @@ public function getDefaultOption()
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class CompositeTest extends \PHPUnit_Framework_TestCase
+class CompositeTest extends TestCase
 {
     public function testMergeNestedGroupsIfNoExplicitParentGroup()
     {
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php b/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php
index fbd4b074260b..ac9c7bcc0811 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Validator\Tests\Constraints;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\File;
 use Symfony\Component\Validator\Exception\ConstraintDefinitionException;
 
-class FileTest extends \PHPUnit_Framework_TestCase
+class FileTest extends TestCase
 {
     /**
      * @param mixed $maxSize
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/GroupSequenceTest.php b/src/Symfony/Component/Validator/Tests/Constraints/GroupSequenceTest.php
index aa2d601042c5..6326d0514ba3 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/GroupSequenceTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/GroupSequenceTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Validator\Tests\Constraints;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\GroupSequence;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class GroupSequenceTest extends \PHPUnit_Framework_TestCase
+class GroupSequenceTest extends TestCase
 {
     public function testCreate()
     {
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/RegexTest.php b/src/Symfony/Component/Validator/Tests/Constraints/RegexTest.php
index ea37bb4d6bd4..3291c77356f2 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/RegexTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/RegexTest.php
@@ -11,12 +11,13 @@
 
 namespace Constraints;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\Regex;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class RegexTest extends \PHPUnit_Framework_TestCase
+class RegexTest extends TestCase
 {
     public function testConstraintGetDefaultOption()
     {
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/ValidTest.php b/src/Symfony/Component/Validator/Tests/Constraints/ValidTest.php
index 3de6ab3217a3..83722fd2df0e 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/ValidTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/ValidTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Validator\Tests\Constraints;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\Valid;
 
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class ValidTest extends \PHPUnit_Framework_TestCase
+class ValidTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Validator\Exception\ConstraintDefinitionException
diff --git a/src/Symfony/Component/Validator/Tests/LegacyExecutionContextTest.php b/src/Symfony/Component/Validator/Tests/LegacyExecutionContextTest.php
index ebf9696a3588..a6737cf5b9d6 100644
--- a/src/Symfony/Component/Validator/Tests/LegacyExecutionContextTest.php
+++ b/src/Symfony/Component/Validator/Tests/LegacyExecutionContextTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Validator\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\Collection;
 use Symfony\Component\Validator\Constraints\All;
 use Symfony\Component\Validator\ConstraintValidatorFactory;
@@ -23,7 +24,7 @@
 /**
  * @group legacy
  */
-class LegacyExecutionContextTest extends \PHPUnit_Framework_TestCase
+class LegacyExecutionContextTest extends TestCase
 {
     const TRANS_DOMAIN = 'trans_domain';
 
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Cache/DoctrineCacheTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Cache/DoctrineCacheTest.php
index a2de306a2f46..19b29227d6d8 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Cache/DoctrineCacheTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Cache/DoctrineCacheTest.php
@@ -12,9 +12,10 @@
 namespace Symfony\Component\Validator\Tests\Mapping\Cache;
 
 use Doctrine\Common\Cache\ArrayCache;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Mapping\Cache\DoctrineCache;
 
-class DoctrineCacheTest extends \PHPUnit_Framework_TestCase
+class DoctrineCacheTest extends TestCase
 {
     private $cache;
 
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Cache/LegacyApcCacheTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Cache/LegacyApcCacheTest.php
index a5d1c239f825..8e6e1bf7b448 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Cache/LegacyApcCacheTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Cache/LegacyApcCacheTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping\Cache;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Mapping\Cache\ApcCache;
 
 /**
  * @group legacy
  * @requires extension apc
  */
-class LegacyApcCacheTest extends \PHPUnit_Framework_TestCase
+class LegacyApcCacheTest extends TestCase
 {
     protected function setUp()
     {
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/ClassMetadataTest.php b/src/Symfony/Component/Validator/Tests/Mapping/ClassMetadataTest.php
index 51b5a09802fe..6240ba727a1c 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/ClassMetadataTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/ClassMetadataTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\Constraints\Valid;
 use Symfony\Component\Validator\Mapping\ClassMetadata;
@@ -18,7 +19,7 @@
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintB;
 use Symfony\Component\Validator\Tests\Fixtures\PropertyConstraint;
 
-class ClassMetadataTest extends \PHPUnit_Framework_TestCase
+class ClassMetadataTest extends TestCase
 {
     const CLASSNAME = 'Symfony\Component\Validator\Tests\Fixtures\Entity';
     const PARENTCLASS = 'Symfony\Component\Validator\Tests\Fixtures\EntityParent';
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Factory/BlackHoleMetadataFactoryTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Factory/BlackHoleMetadataFactoryTest.php
index 641bf919d480..a323567d2316 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Factory/BlackHoleMetadataFactoryTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Factory/BlackHoleMetadataFactoryTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping\Factory;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Mapping\Factory\BlackHoleMetadataFactory;
 
-class BlackHoleMetadataFactoryTest extends \PHPUnit_Framework_TestCase
+class BlackHoleMetadataFactoryTest extends TestCase
 {
     /**
      * @expectedException \LogicException
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php
index 400c39ce4cfa..1ebce65cc202 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping\Factory;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\Callback;
 use Symfony\Component\Validator\Mapping\ClassMetadata;
 use Symfony\Component\Validator\Mapping\Factory\LazyLoadingMetadataFactory;
 use Symfony\Component\Validator\Mapping\Loader\LoaderInterface;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintA;
 
-class LazyLoadingMetadataFactoryTest extends \PHPUnit_Framework_TestCase
+class LazyLoadingMetadataFactoryTest extends TestCase
 {
     const CLASS_NAME = 'Symfony\Component\Validator\Tests\Fixtures\Entity';
     const PARENT_CLASS = 'Symfony\Component\Validator\Tests\Fixtures\EntityParent';
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/GetterMetadataTest.php b/src/Symfony/Component/Validator/Tests/Mapping/GetterMetadataTest.php
index 078159971af8..2c21d09487d4 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/GetterMetadataTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/GetterMetadataTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Mapping\GetterMetadata;
 use Symfony\Component\Validator\Tests\Fixtures\Entity;
 
-class GetterMetadataTest extends \PHPUnit_Framework_TestCase
+class GetterMetadataTest extends TestCase
 {
     const CLASSNAME = 'Symfony\Component\Validator\Tests\Fixtures\Entity';
 
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/LegacyElementMetadataTest.php b/src/Symfony/Component/Validator/Tests/Mapping/LegacyElementMetadataTest.php
index b68c88293f19..1fb2e6e7c814 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/LegacyElementMetadataTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/LegacyElementMetadataTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Mapping\ElementMetadata;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintA;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintB;
@@ -18,7 +19,7 @@
 /**
  * @group legacy
  */
-class LegacyElementMetadataTest extends \PHPUnit_Framework_TestCase
+class LegacyElementMetadataTest extends TestCase
 {
     protected $metadata;
 
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Loader/AnnotationLoaderTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Loader/AnnotationLoaderTest.php
index 0e2ad41d697a..fb776ae32c0a 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Loader/AnnotationLoaderTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Loader/AnnotationLoaderTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Validator\Tests\Mapping\Loader;
 
 use Doctrine\Common\Annotations\AnnotationReader;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\All;
 use Symfony\Component\Validator\Constraints\Callback;
 use Symfony\Component\Validator\Constraints\Choice;
@@ -23,7 +24,7 @@
 use Symfony\Component\Validator\Mapping\Loader\AnnotationLoader;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintA;
 
-class AnnotationLoaderTest extends \PHPUnit_Framework_TestCase
+class AnnotationLoaderTest extends TestCase
 {
     public function testLoadClassMetadataReturnsTrueIfSuccessful()
     {
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Loader/FilesLoaderTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Loader/FilesLoaderTest.php
index c131f28aea55..6fee7b6ff540 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Loader/FilesLoaderTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Loader/FilesLoaderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Mapping\ClassMetadata;
 use Symfony\Component\Validator\Mapping\Loader\LoaderInterface;
 
-class FilesLoaderTest extends \PHPUnit_Framework_TestCase
+class FilesLoaderTest extends TestCase
 {
     public function testCallsGetFileLoaderInstanceForeachPath()
     {
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Loader/LoaderChainTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Loader/LoaderChainTest.php
index c0a46cb0fdd0..49a8b5256d0b 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Loader/LoaderChainTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Loader/LoaderChainTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Mapping\ClassMetadata;
 use Symfony\Component\Validator\Mapping\Loader\LoaderChain;
 
-class LoaderChainTest extends \PHPUnit_Framework_TestCase
+class LoaderChainTest extends TestCase
 {
     public function testAllLoadersAreCalled()
     {
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Loader/StaticMethodLoaderTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Loader/StaticMethodLoaderTest.php
index db4076cb7090..069ccd322929 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Loader/StaticMethodLoaderTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Loader/StaticMethodLoaderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Mapping\ClassMetadata;
 use Symfony\Component\Validator\Mapping\Loader\StaticMethodLoader;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintA;
 
-class StaticMethodLoaderTest extends \PHPUnit_Framework_TestCase
+class StaticMethodLoaderTest extends TestCase
 {
     private $errorLevel;
 
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Loader/XmlFileLoaderTest.php
index 2053e2485688..818094962ca2 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Loader/XmlFileLoaderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\All;
 use Symfony\Component\Validator\Constraints\Callback;
 use Symfony\Component\Validator\Constraints\Choice;
@@ -26,7 +27,7 @@
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintA;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintB;
 
-class XmlFileLoaderTest extends \PHPUnit_Framework_TestCase
+class XmlFileLoaderTest extends TestCase
 {
     public function testLoadClassMetadataReturnsTrueIfSuccessful()
     {
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Loader/YamlFileLoaderTest.php
index 15f02139ae31..a50b4b302071 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Loader/YamlFileLoaderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\All;
 use Symfony\Component\Validator\Constraints\Callback;
 use Symfony\Component\Validator\Constraints\Choice;
@@ -23,7 +24,7 @@
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintA;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintB;
 
-class YamlFileLoaderTest extends \PHPUnit_Framework_TestCase
+class YamlFileLoaderTest extends TestCase
 {
     public function testLoadClassMetadataReturnsFalseIfEmpty()
     {
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php b/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php
index fafde341ac06..2ced2c739d41 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\Valid;
 use Symfony\Component\Validator\Mapping\MemberMetadata;
 use Symfony\Component\Validator\Tests\Fixtures\ClassConstraint;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintA;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintB;
 
-class MemberMetadataTest extends \PHPUnit_Framework_TestCase
+class MemberMetadataTest extends TestCase
 {
     protected $metadata;
 
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/PropertyMetadataTest.php b/src/Symfony/Component/Validator/Tests/Mapping/PropertyMetadataTest.php
index e0ff920fe1ef..f61545a5a2d4 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/PropertyMetadataTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/PropertyMetadataTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Validator\Tests\Mapping;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Mapping\PropertyMetadata;
 use Symfony\Component\Validator\Tests\Fixtures\Entity;
 
-class PropertyMetadataTest extends \PHPUnit_Framework_TestCase
+class PropertyMetadataTest extends TestCase
 {
     const CLASSNAME = 'Symfony\Component\Validator\Tests\Fixtures\Entity';
     const PARENTCLASS = 'Symfony\Component\Validator\Tests\Fixtures\EntityParent';
diff --git a/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php b/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
index 8a766611cd4f..14dd58fbeceb 100644
--- a/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
+++ b/src/Symfony/Component/Validator/Tests/Resources/TranslationFilesTest.php
@@ -11,7 +11,9 @@
 
 namespace Symfony\Component\Validator\Tests\Resources;
 
-class TranslationFilesTest extends \PHPUnit_Framework_TestCase
+use PHPUnit\Framework\TestCase;
+
+class TranslationFilesTest extends TestCase
 {
     /**
      * @dataProvider provideTranslationFiles
diff --git a/src/Symfony/Component/Validator/Tests/Util/PropertyPathTest.php b/src/Symfony/Component/Validator/Tests/Util/PropertyPathTest.php
index a8b9af9de85c..235e1780d907 100644
--- a/src/Symfony/Component/Validator/Tests/Util/PropertyPathTest.php
+++ b/src/Symfony/Component/Validator/Tests/Util/PropertyPathTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Validator\Tests\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Util\PropertyPath;
 
-class PropertyPathTest extends \PHPUnit_Framework_TestCase
+class PropertyPathTest extends TestCase
 {
     /**
      * @dataProvider provideAppendPaths
diff --git a/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php b/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php
index d5ff2954f818..1d8813d97a3d 100644
--- a/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Validator\Tests\Validator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\Callback;
 use Symfony\Component\Validator\Constraints\GroupSequence;
 use Symfony\Component\Validator\Constraints\Valid;
@@ -25,7 +26,7 @@
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-abstract class AbstractValidatorTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractValidatorTest extends TestCase
 {
     const ENTITY_CLASS = 'Symfony\Component\Validator\Tests\Fixtures\Entity';
 
diff --git a/src/Symfony/Component/Validator/Tests/ValidatorBuilderTest.php b/src/Symfony/Component/Validator/Tests/ValidatorBuilderTest.php
index d41a791978bc..77d586412b76 100644
--- a/src/Symfony/Component/Validator/Tests/ValidatorBuilderTest.php
+++ b/src/Symfony/Component/Validator/Tests/ValidatorBuilderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Validator\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\ValidatorBuilder;
 use Symfony\Component\Validator\ValidatorBuilderInterface;
 
-class ValidatorBuilderTest extends \PHPUnit_Framework_TestCase
+class ValidatorBuilderTest extends TestCase
 {
     /**
      * @var ValidatorBuilderInterface
diff --git a/src/Symfony/Component/VarDumper/Test/VarDumperTestCase.php b/src/Symfony/Component/VarDumper/Test/VarDumperTestCase.php
index 006c1dc7a8f6..b4366461f693 100644
--- a/src/Symfony/Component/VarDumper/Test/VarDumperTestCase.php
+++ b/src/Symfony/Component/VarDumper/Test/VarDumperTestCase.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\VarDumper\Test;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\VarDumper\Cloner\VarCloner;
 use Symfony\Component\VarDumper\Dumper\CliDumper;
 
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  */
-abstract class VarDumperTestCase extends \PHPUnit_Framework_TestCase
+abstract class VarDumperTestCase extends TestCase
 {
     public function assertDumpEquals($dump, $data, $message = '')
     {
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/PdoCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/PdoCasterTest.php
index 0642c53716c5..3ad921313ba9 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/PdoCasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/PdoCasterTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\VarDumper\Tests\Caster;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\VarDumper\Caster\PdoCaster;
 use Symfony\Component\VarDumper\Cloner\Stub;
 
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  */
-class PdoCasterTest extends \PHPUnit_Framework_TestCase
+class PdoCasterTest extends TestCase
 {
     /**
      * @requires extension pdo_sqlite
diff --git a/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php b/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php
index e6fd489448bd..c3a8e1a6c948 100644
--- a/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\VarDumper\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\VarDumper\Cloner\VarCloner;
 use Symfony\Component\VarDumper\Dumper\HtmlDumper;
 
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  */
-class HtmlDumperTest extends \PHPUnit_Framework_TestCase
+class HtmlDumperTest extends TestCase
 {
     public function testGet()
     {
diff --git a/src/Symfony/Component/VarDumper/Tests/VarClonerTest.php b/src/Symfony/Component/VarDumper/Tests/VarClonerTest.php
index 9f60032e0c62..8ca59bdddfe7 100644
--- a/src/Symfony/Component/VarDumper/Tests/VarClonerTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/VarClonerTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\VarDumper\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\VarDumper\Cloner\VarCloner;
 
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  */
-class VarClonerTest extends \PHPUnit_Framework_TestCase
+class VarClonerTest extends TestCase
 {
     public function testMaxIntBoundary()
     {
diff --git a/src/Symfony/Component/Yaml/Tests/DumperTest.php b/src/Symfony/Component/Yaml/Tests/DumperTest.php
index 84069d8aef9f..c27ac5cc5c70 100644
--- a/src/Symfony/Component/Yaml/Tests/DumperTest.php
+++ b/src/Symfony/Component/Yaml/Tests/DumperTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Yaml\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Yaml\Parser;
 use Symfony\Component\Yaml\Dumper;
 
-class DumperTest extends \PHPUnit_Framework_TestCase
+class DumperTest extends TestCase
 {
     protected $parser;
     protected $dumper;
diff --git a/src/Symfony/Component/Yaml/Tests/InlineTest.php b/src/Symfony/Component/Yaml/Tests/InlineTest.php
index 56966bacd333..b25b6015f130 100644
--- a/src/Symfony/Component/Yaml/Tests/InlineTest.php
+++ b/src/Symfony/Component/Yaml/Tests/InlineTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Yaml\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Yaml\Inline;
 
-class InlineTest extends \PHPUnit_Framework_TestCase
+class InlineTest extends TestCase
 {
     /**
      * @dataProvider getTestsForParse
diff --git a/src/Symfony/Component/Yaml/Tests/ParseExceptionTest.php b/src/Symfony/Component/Yaml/Tests/ParseExceptionTest.php
index e4eb9c98a15d..4f01ab938e50 100644
--- a/src/Symfony/Component/Yaml/Tests/ParseExceptionTest.php
+++ b/src/Symfony/Component/Yaml/Tests/ParseExceptionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Yaml\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Yaml\Exception\ParseException;
 
-class ParseExceptionTest extends \PHPUnit_Framework_TestCase
+class ParseExceptionTest extends TestCase
 {
     public function testGetMessage()
     {
diff --git a/src/Symfony/Component/Yaml/Tests/ParserTest.php b/src/Symfony/Component/Yaml/Tests/ParserTest.php
index e1e0d5a61419..7e353b4e34be 100644
--- a/src/Symfony/Component/Yaml/Tests/ParserTest.php
+++ b/src/Symfony/Component/Yaml/Tests/ParserTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Yaml\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Yaml\Yaml;
 use Symfony\Component\Yaml\Parser;
 
-class ParserTest extends \PHPUnit_Framework_TestCase
+class ParserTest extends TestCase
 {
     protected $parser;
 
diff --git a/src/Symfony/Component/Yaml/Tests/YamlTest.php b/src/Symfony/Component/Yaml/Tests/YamlTest.php
index 883ee835a096..9e776ca497c0 100644
--- a/src/Symfony/Component/Yaml/Tests/YamlTest.php
+++ b/src/Symfony/Component/Yaml/Tests/YamlTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Yaml\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Yaml\Yaml;
 
-class YamlTest extends \PHPUnit_Framework_TestCase
+class YamlTest extends TestCase
 {
     public function testParseAndDump()
     {