diff --git a/composer.json b/composer.json
index d1f5a22..e1d578e 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,8 @@
   "autoload-dev": {
     "psr-4": {
       "My\\Integration\\": "tests/integration/src",
-      "AdrianSuter\\Autoload\\Override\\": "tests/integration/src-override"
+      "AdrianSuter\\Autoload\\Override\\": "tests/integration/src-override",
+      "AdrianSuter\\Autoload\\Override\\Tests\\": "tests"
     },
     "classmap": [
       "tests/integration/src/TestClassMapOverride"
@@ -37,12 +38,15 @@
     "nikic/php-parser": "^4.3"
   },
   "require-dev": {
-    "phpunit/phpunit": "^7.0"
+    "phpunit/phpunit": "^7.0",
+    "squizlabs/php_codesniffer": "^3.5"
   },
   "scripts": {
     "test": [
-      "@phpunit"
+      "@phpunit",
+      "@phpcs"
     ],
-    "phpunit": "phpunit"
+    "phpunit": "phpunit",
+    "phpcs": "phpcs"
   }
 }
diff --git a/phpcs.xml b/phpcs.xml
new file mode 100644
index 0000000..ab3382e
--- /dev/null
+++ b/phpcs.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0"?>
+<ruleset name="PHP Autoload Override coding standard">
+    <description>PHP Autoload Override coding standard</description>
+
+    <!-- display progress -->
+    <arg value="p"/>
+    <!-- use colors in output -->
+    <arg name="colors"/>
+
+    <!-- inherit rules from: -->
+    <rule ref="PSR12"/>
+    <rule ref="Generic.Arrays.DisallowLongArraySyntax"/>
+
+    <!-- Paths to check -->
+    <file>src</file>
+    <file>tests</file>
+</ruleset>
diff --git a/src/AutoloadCollection.php b/src/AutoloadCollection.php
index 291dddb..f7fde6a 100644
--- a/src/AutoloadCollection.php
+++ b/src/AutoloadCollection.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/src/ClosureHandler.php b/src/ClosureHandler.php
index 9fcd1af..6096875 100644
--- a/src/ClosureHandler.php
+++ b/src/ClosureHandler.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/src/CodeConverter.php b/src/CodeConverter.php
index 7ecb399..4159f94 100644
--- a/src/CodeConverter.php
+++ b/src/CodeConverter.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -75,10 +76,10 @@ public function __construct(
         ?NodeFinder $nodeFinder = null
     ) {
         $this->lexer = $lexer ?? new Emulative(
-                [
+            [
                     'usedAttributes' => ['comments', 'startLine', 'endLine', 'startTokenPos', 'endTokenPos'],
                 ]
-            );
+        );
 
         $this->parser = $parser ?? new Php7($this->lexer);
 
diff --git a/src/FileStreamWrapper.php b/src/FileStreamWrapper.php
index 1703854..afc6201 100644
--- a/src/FileStreamWrapper.php
+++ b/src/FileStreamWrapper.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -42,6 +43,7 @@
 use function touch;
 use function unlink;
 
+// phpcs:disable PSR1.Methods.CamelCapsMethodName
 class FileStreamWrapper
 {
     /**
diff --git a/src/Override.php b/src/Override.php
index 6ffc7c0..b803973 100644
--- a/src/Override.php
+++ b/src/Override.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/AbstractIntegrationTest.php b/tests/AbstractIntegrationTest.php
index 2f367eb..8b227c7 100644
--- a/tests/AbstractIntegrationTest.php
+++ b/tests/AbstractIntegrationTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -7,6 +8,8 @@
 
 declare(strict_types=1);
 
+namespace AdrianSuter\Autoload\Override\Tests;
+
 use AdrianSuter\Autoload\Override\Override;
 use PHPUnit\Framework\TestCase;
 
@@ -24,7 +27,6 @@ public static function setUpBeforeClass()
     protected function setUp()
     {
         parent::setUp();
-
         if (!$this->overrideApplied) {
             $this->overrideApplied = true;
             Override::apply(self::$classLoader, $this->getOverrideDeclarations());
diff --git a/tests/AutoloadCollectionTest.php b/tests/AutoloadCollectionTest.php
index f7b8579..a9dc9e8 100644
--- a/tests/AutoloadCollectionTest.php
+++ b/tests/AutoloadCollectionTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -7,6 +8,8 @@
 
 declare(strict_types=1);
 
+namespace AdrianSuter\Autoload\Override\Tests;
+
 use AdrianSuter\Autoload\Override\AutoloadCollection;
 use PHPUnit\Framework\TestCase;
 
diff --git a/tests/ClosureHandlerTest.php b/tests/ClosureHandlerTest.php
index 26be267..e99acea 100644
--- a/tests/ClosureHandlerTest.php
+++ b/tests/ClosureHandlerTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -7,8 +8,11 @@
 
 declare(strict_types=1);
 
+namespace AdrianSuter\Autoload\Override\Tests;
+
 use AdrianSuter\Autoload\Override\ClosureHandler;
 use PHPUnit\Framework\TestCase;
+use RuntimeException;
 
 final class ClosureHandlerTest extends TestCase
 {
diff --git a/tests/CodeConverterTest.php b/tests/CodeConverterTest.php
index 296e2b9..d525b68 100644
--- a/tests/CodeConverterTest.php
+++ b/tests/CodeConverterTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -7,6 +8,8 @@
 
 declare(strict_types=1);
 
+namespace AdrianSuter\Autoload\Override\Tests;
+
 use AdrianSuter\Autoload\Override\CodeConverter;
 use PHPUnit\Framework\TestCase;
 
@@ -15,7 +18,6 @@ class CodeConverterTest extends TestCase
     public function testA()
     {
         $converter = new CodeConverter();
-
         $this->assertEquals(
             '<?php echo \foo\rand(0, 9);',
             $converter->convert('<?php echo \rand(0, 9);', ['\rand' => 'foo\rand'])
diff --git a/tests/FileStreamWrapperTest.php b/tests/FileStreamWrapperTest.php
index ac81fa9..3080f74 100644
--- a/tests/FileStreamWrapperTest.php
+++ b/tests/FileStreamWrapperTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -7,8 +8,12 @@
 
 declare(strict_types=1);
 
+namespace AdrianSuter\Autoload\Override\Tests;
+
 use AdrianSuter\Autoload\Override\FileStreamWrapper;
 use PHPUnit\Framework\TestCase;
+use ReflectionProperty;
+use RuntimeException;
 
 final class FileStreamWrapperTest extends TestCase
 {
diff --git a/tests/IntegrationClassMapTest.php b/tests/IntegrationClassMapTest.php
index cd5b790..0509b8e 100644
--- a/tests/IntegrationClassMapTest.php
+++ b/tests/IntegrationClassMapTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -7,6 +8,8 @@
 
 declare(strict_types=1);
 
+namespace AdrianSuter\Autoload\Override\Tests;
+
 class IntegrationClassMapTest extends AbstractIntegrationTest
 {
     protected function getOverrideDeclarations(): array
@@ -14,11 +17,13 @@ protected function getOverrideDeclarations(): array
         return [
             \My\Integration\TestClassMapOverride\Calculator::class => [
                 'cos' => function (float $arg): float {
+
                     return \sin($arg);
                 },
             ],
             'My\\Integration\\TestClassMapOverride\\' => [
                 'cos' => function (float $arg): float {
+
                     return $arg * 2;
                 },
             ]
@@ -28,24 +33,21 @@ protected function getOverrideDeclarations(): array
     public function testCalculator()
     {
         $calculator = new \My\Integration\TestClassMapOverride\Calculator();
-
-        // Calls \cos() > Overridden by FQCN-declaration.
+// Calls \cos() > Overridden by FQCN-declaration.
         $this->assertEquals(\sin(\pi() / 2), $calculator->cos(\pi() / 2));
     }
 
     public function testGeometry()
     {
         $geometry = new \My\Integration\TestClassMapOverride\SubNamespace\Geometry();
-
-        // Calls \cos() > Overridden by FQNS-declaration.
+// Calls \cos() > Overridden by FQNS-declaration.
         $this->assertEquals(1, $geometry->cos(0.5));
     }
 
     public function testOtherCalculator()
     {
         $otherCalculator = new \My\Integration\TestClassMapOverride\OtherCalculator();
-
-        // Calls \cos() > Overridden by FQNS-declaration.
+// Calls \cos() > Overridden by FQNS-declaration.
         $this->assertEquals(2, $otherCalculator->cos(1));
     }
 }
diff --git a/tests/IntegrationClosureTest.php b/tests/IntegrationClosureTest.php
index 6a3ddbf..0d0747b 100644
--- a/tests/IntegrationClosureTest.php
+++ b/tests/IntegrationClosureTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -7,6 +8,8 @@
 
 declare(strict_types=1);
 
+namespace AdrianSuter\Autoload\Override\Tests;
+
 class IntegrationClosureTest extends AbstractIntegrationTest
 {
     protected function getOverrideDeclarations(): array
@@ -15,14 +18,17 @@ protected function getOverrideDeclarations(): array
             // Test that the class loader can find the file to that class.
             \My\Integration\TestClosureOverride\Clock::class => [
                 'time' => function () {
+
                     return 100;
                 },
                 'rand' => function (int $min, int $max): int {
+
                     return $min + $max;
                 }
             ],
             \My\Integration\TestClosureOverride\SubSpace\Digital::class => [
                 'rand' => function (int $min, int $max): int {
+
                     return 2 * ($min + $max);
                 }
             ],
@@ -30,6 +36,7 @@ protected function getOverrideDeclarations(): array
             // directory to the "TestClosureOverride" sub namespace.
             'My\\Integration\\TestClosureOverride\\' => [
                 'rand' => function (int $min, int $max): int {
+
                     return 3 * ($min + $max);
                 }
             ],
@@ -37,11 +44,13 @@ protected function getOverrideDeclarations(): array
             // directory to the "TestClosureOverride\SubSpace" sub namespace.
             'My\\Integration\\TestClosureOverride\\SubSpace\\' => [
                 'time' => function () {
+
                     return 101;
                 }
             ],
             \My\Integration\TestClosureOverride\OtherSpace\Other::class => [
                 'time' => function (): int {
+
                     return 102;
                 }
             ]
@@ -51,67 +60,53 @@ protected function getOverrideDeclarations(): array
     public function testClock()
     {
         $clock = new \My\Integration\TestClosureOverride\Clock();
-
-        // Calls \time() > Overridden by FQCN-declaration.
+// Calls \time() > Overridden by FQCN-declaration.
         $this->assertEquals(100, $clock->time());
-
-        // Calls \time()-alias > Overridden by FQCN-declaration.
+// Calls \time()-alias > Overridden by FQCN-declaration.
         $this->assertEquals(100, $clock->timeWithAlias());
-
-        // Calls \rand() > Overridden by FQCN-declaration.
+// Calls \rand() > Overridden by FQCN-declaration.
         $this->assertEquals(11, $clock->rand(1, 10));
     }
 
     public function testSubClock()
     {
         $subClock = new \My\Integration\TestClosureOverride\SubClock();
-
-        // Calls \time() > No override.
+// Calls \time() > No override.
         $this->assertGreaterThanOrEqual(\time(), $subClock->time());
-
-        // Parent > Calls \time()-alias > Overridden by FQCN-declaration.
+// Parent > Calls \time()-alias > Overridden by FQCN-declaration.
         $this->assertEquals(100, $subClock->timeWithAlias());
-
-        // Calls parent > Calls \rand() > Overridden by FQCN-declaration.
+// Calls parent > Calls \rand() > Overridden by FQCN-declaration.
         $this->assertEquals(9, $subClock->rand(3, 6));
     }
 
     public function testDigital()
     {
         $digital = new \My\Integration\TestClosureOverride\SubSpace\Digital();
-
-        // Calls \time() > Overridden by FQNS-declaration.
+// Calls \time() > Overridden by FQNS-declaration.
         $this->assertEquals(101, $digital->time());
-
-        // Calls \rand() > Overridden by FQCN-declaration.
+// Calls \rand() > Overridden by FQCN-declaration.
         $this->assertEquals(22, $digital->rand(1, 10));
     }
 
     public function testSubDigital()
     {
         $subDigital = new \My\Integration\TestClosureOverride\SubDigital();
-
-        // Parent > Calls \time() > Overridden by FQNS-declaration.
+// Parent > Calls \time() > Overridden by FQNS-declaration.
         $this->assertEquals(101, $subDigital->time());
-
-        // Calls \time() > No override.
+// Calls \time() > No override.
         $this->assertGreaterThanOrEqual(\time(), $subDigital->subTime());
-
-        // Calls \rand() > Overridden by FQNS.
+// Calls \rand() > Overridden by FQNS.
         $this->assertEquals(33, $subDigital->rand(1, 10));
     }
 
     public function testSubSpaceClock()
     {
         $subSpaceClock = new \My\Integration\TestClosureOverride\SubSpace\SubSpaceClock();
-
-        // Calls \time() > Overridden by FQNS.
+// Calls \time() > Overridden by FQNS.
         $this->assertEquals(101, $subSpaceClock->time());
-
-        // Parent > Calls \time()-alias > Overridden by FQCN-declaration.
+// Parent > Calls \time()-alias > Overridden by FQCN-declaration.
         $this->assertEquals(100, $subSpaceClock->timeWithAlias());
-
-        // Calls \rand() > No override.
+// Calls \rand() > No override.
         $rand = $subSpaceClock->rand(1, 10);
         $this->assertGreaterThanOrEqual(1, $rand);
         $this->assertLessThanOrEqual(10, $rand);
@@ -120,11 +115,9 @@ public function testSubSpaceClock()
     public function testOther()
     {
         $other = new \My\Integration\TestClosureOverride\OtherSpace\Other();
-
-        // Calls \time() > Overridden by FQCN-declaration.
+// Calls \time() > Overridden by FQCN-declaration.
         $this->assertEquals(102, $other->time());
-
-        // Calls \rand() > No override.
+// Calls \rand() > No override.
         $rand = $other->rand(1, 10);
         $this->assertGreaterThanOrEqual(1, $rand);
         $this->assertLessThanOrEqual(10, $rand);
@@ -133,11 +126,9 @@ public function testOther()
     public function testSpace()
     {
         $space = new \My\Integration\TestClosureOverride\OtherSpace\Space();
-
-        // Calls \time() > No override.
+// Calls \time() > No override.
         $this->assertGreaterThanOrEqual(\time(), $space->time());
-
-        // Calls time() which is a local function in the namespace.
+// Calls time() which is a local function in the namespace.
         $this->assertEquals(105, $space->timeLocal());
     }
 }
diff --git a/tests/IntegrationCustomNamespaceTest.php b/tests/IntegrationCustomNamespaceTest.php
index aab1517..828ca13 100644
--- a/tests/IntegrationCustomNamespaceTest.php
+++ b/tests/IntegrationCustomNamespaceTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -7,6 +8,8 @@
 
 declare(strict_types=1);
 
+namespace AdrianSuter\Autoload\Override\Tests;
+
 class IntegrationCustomNamespaceTest extends AbstractIntegrationTest
 {
     public static function setUpBeforeClass()
@@ -26,8 +29,7 @@ protected function getOverrideDeclarations(): array
     public function testHash()
     {
         $hash = new \My\Integration\TestCustomNamespaceOverride\Hash();
-
-        // Calls \md5() > Overridden by FQCN-declaration.
+// Calls \md5() > Overridden by FQCN-declaration.
         $GLOBALS['md5_return'] = '---';
         $this->assertEquals('---', $hash->hash('1'));
     }
diff --git a/tests/IntegrationNamespaceTest.php b/tests/IntegrationNamespaceTest.php
index 4f16c3a..f0ef0f0 100644
--- a/tests/IntegrationNamespaceTest.php
+++ b/tests/IntegrationNamespaceTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -7,6 +8,8 @@
 
 declare(strict_types=1);
 
+namespace AdrianSuter\Autoload\Override\Tests;
+
 class IntegrationNamespaceTest extends AbstractIntegrationTest
 {
     public static function setUpBeforeClass()
@@ -29,15 +32,12 @@ protected function getOverrideDeclarations(): array
     public function testEarth()
     {
         $earth = new \My\Integration\TestNamespaceOverride\Earth();
-
-        // Calls substr() which is a local function in the namespace.
+// Calls substr() which is a local function in the namespace.
         $this->assertEquals('GFE', $earth->substrLocal());
-
-        // Calls \substr() > Overridden by FQNS-declaration.
+// Calls \substr() > Overridden by FQNS-declaration.
         $GLOBALS['substr_return'] = 'XYZ';
         $this->assertEquals('XYZ', $earth->substrGlobal());
-
-        // Calls \time() > No override.
+// Calls \time() > No override.
         $GLOBALS['time_return'] = 3;
         $this->assertGreaterThanOrEqual(\time(), $earth->time());
     }
@@ -45,16 +45,13 @@ public function testEarth()
     public function testMoon()
     {
         $moon = new \My\Integration\TestNamespaceOverride\Moon();
-
-        // Calls \time() > Overridden by FQCN.
+// Calls \time() > Overridden by FQCN.
         $GLOBALS['time_return'] = 1;
         $this->assertEquals(1, $moon->time());
-
-        // Calls \time()-alias > Overridden by FQCN.
+// Calls \time()-alias > Overridden by FQCN.
         $GLOBALS['time_return'] = 2;
         $this->assertEquals(2, $moon->timeUseAlias());
-
-        // Calls \substr() > Overridden by FQNS-declaration.
+// Calls \substr() > Overridden by FQNS-declaration.
         $GLOBALS['substr_return'] = 'ZZZ';
         $this->assertEquals('ZZZ', $moon->substr('AAA', 0, 2));
     }
diff --git a/tests/IntegrationPsr4MultiDirTest.php b/tests/IntegrationPsr4MultiDirTest.php
index 8965d76..d7ea185 100644
--- a/tests/IntegrationPsr4MultiDirTest.php
+++ b/tests/IntegrationPsr4MultiDirTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -7,6 +8,8 @@
 
 declare(strict_types=1);
 
+namespace AdrianSuter\Autoload\Override\Tests;
+
 class IntegrationPsr4MultiDirTest extends AbstractIntegrationTest
 {
     protected function getOverrideDeclarations(): array
@@ -14,11 +17,13 @@ protected function getOverrideDeclarations(): array
         return [
             \AdrianSuter\Autoload\Override\Science::class => [
                 'str_repeat' => function ($str, $multiplier) {
+
                     return \str_repeat($str, 2 * $multiplier);
                 }
             ],
             'AdrianSuter\\Autoload\\Override\\SubSpace\\' => [
                 'str_repeat' => function ($input, $multiplier) {
+
                     return ':';
                 }
             ],
@@ -28,16 +33,14 @@ protected function getOverrideDeclarations(): array
     public function testScience()
     {
         $science = new \AdrianSuter\Autoload\Override\Science();
-
-        // Calls \str_repeat() > Overridden by FQCN-declaration.
+// Calls \str_repeat() > Overridden by FQCN-declaration.
         $this->assertEquals('xxxx', $science->crosses(2));
     }
 
     public function testSpeech()
     {
         $speech = new \AdrianSuter\Autoload\Override\SubSpace\Speech();
-
-        // Calls \str_repeat() > Overridden by FQNS-declaration.
+// Calls \str_repeat() > Overridden by FQNS-declaration.
         $this->assertEquals(':', $speech->whisper(2));
     }
 }
diff --git a/tests/OverrideTest.php b/tests/OverrideTest.php
index 3ee847f..f63d785 100644
--- a/tests/OverrideTest.php
+++ b/tests/OverrideTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -7,6 +8,8 @@
 
 declare(strict_types=1);
 
+namespace AdrianSuter\Autoload\Override\Tests;
+
 use AdrianSuter\Autoload\Override\CodeConverter;
 use AdrianSuter\Autoload\Override\Override;
 use Composer\Autoload\ClassLoader;
@@ -29,7 +32,8 @@ public function testSetFQFCConverter()
     public function testGetFQFCConverter()
     {
         $this->assertInstanceOf(
-            CodeConverter::class, Override::getCodeConverter()
+            CodeConverter::class,
+            Override::getCodeConverter()
         );
     }
 
diff --git a/tests/assets/PHPAutoloadOverride.php b/tests/assets/PHPAutoloadOverride.php
index 3fdecbc..6bdee86 100644
--- a/tests/assets/PHPAutoloadOverride.php
+++ b/tests/assets/PHPAutoloadOverride.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/assets/PHPCustomAutoloadOverride.php b/tests/assets/PHPCustomAutoloadOverride.php
index 6a1ad95..8f985bf 100644
--- a/tests/assets/PHPCustomAutoloadOverride.php
+++ b/tests/assets/PHPCustomAutoloadOverride.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -9,6 +10,7 @@
 
 namespace PHPCustomAutoloadOverride;
 
+/** @noinspection PhpUnused */
 function md5(string $str, bool $raw_output = false): string
 {
     if (isset($GLOBALS['md5_return'])) {
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index ef9867e..b631363 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src-override/Science.php b/tests/integration/src-override/Science.php
index ebdb030..3d2ba0a 100644
--- a/tests/integration/src-override/Science.php
+++ b/tests/integration/src-override/Science.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src-override/SubSpace/Speech.php b/tests/integration/src-override/SubSpace/Speech.php
index 92234d1..b6ca310 100644
--- a/tests/integration/src-override/SubSpace/Speech.php
+++ b/tests/integration/src-override/SubSpace/Speech.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestClassMapOverride/Calculator.php b/tests/integration/src/TestClassMapOverride/Calculator.php
index 1904a5f..c468428 100644
--- a/tests/integration/src/TestClassMapOverride/Calculator.php
+++ b/tests/integration/src/TestClassMapOverride/Calculator.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
@@ -9,6 +10,8 @@
 
 namespace My\Integration\TestClassMapOverride;
 
+use function cos;
+
 /**
  * Overrides declared for
  * - \cos() : FQCN
@@ -19,6 +22,6 @@ class Calculator
 {
     public function cos(float $arg): float
     {
-        return \cos($arg);
+        return cos($arg);
     }
 }
diff --git a/tests/integration/src/TestClassMapOverride/OtherCalculator.php b/tests/integration/src/TestClassMapOverride/OtherCalculator.php
index c5ad3d1..3e0d987 100644
--- a/tests/integration/src/TestClassMapOverride/OtherCalculator.php
+++ b/tests/integration/src/TestClassMapOverride/OtherCalculator.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestClassMapOverride/SubNamespace/Geometry.php b/tests/integration/src/TestClassMapOverride/SubNamespace/Geometry.php
index f053a46..5c3f7be 100644
--- a/tests/integration/src/TestClassMapOverride/SubNamespace/Geometry.php
+++ b/tests/integration/src/TestClassMapOverride/SubNamespace/Geometry.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestClosureOverride/Clock.php b/tests/integration/src/TestClosureOverride/Clock.php
index cc05dba..00bd9d1 100644
--- a/tests/integration/src/TestClosureOverride/Clock.php
+++ b/tests/integration/src/TestClosureOverride/Clock.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestClosureOverride/OtherSpace/Other.php b/tests/integration/src/TestClosureOverride/OtherSpace/Other.php
index 627ddb2..93787ff 100644
--- a/tests/integration/src/TestClosureOverride/OtherSpace/Other.php
+++ b/tests/integration/src/TestClosureOverride/OtherSpace/Other.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestClosureOverride/OtherSpace/Space.php b/tests/integration/src/TestClosureOverride/OtherSpace/Space.php
index aa73178..ac926ec 100644
--- a/tests/integration/src/TestClosureOverride/OtherSpace/Space.php
+++ b/tests/integration/src/TestClosureOverride/OtherSpace/Space.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestClosureOverride/SubClock.php b/tests/integration/src/TestClosureOverride/SubClock.php
index 0d03315..662cc0a 100644
--- a/tests/integration/src/TestClosureOverride/SubClock.php
+++ b/tests/integration/src/TestClosureOverride/SubClock.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestClosureOverride/SubDigital.php b/tests/integration/src/TestClosureOverride/SubDigital.php
index d297832..d15ff5d 100644
--- a/tests/integration/src/TestClosureOverride/SubDigital.php
+++ b/tests/integration/src/TestClosureOverride/SubDigital.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestClosureOverride/SubSpace/Digital.php b/tests/integration/src/TestClosureOverride/SubSpace/Digital.php
index 7ad772b..e134c08 100644
--- a/tests/integration/src/TestClosureOverride/SubSpace/Digital.php
+++ b/tests/integration/src/TestClosureOverride/SubSpace/Digital.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestClosureOverride/SubSpace/SubSpaceClock.php b/tests/integration/src/TestClosureOverride/SubSpace/SubSpaceClock.php
index 7fd65e0..86b411f 100644
--- a/tests/integration/src/TestClosureOverride/SubSpace/SubSpaceClock.php
+++ b/tests/integration/src/TestClosureOverride/SubSpace/SubSpaceClock.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestCustomNamespaceOverride/Hash.php b/tests/integration/src/TestCustomNamespaceOverride/Hash.php
index dc8f418..c0419e2 100644
--- a/tests/integration/src/TestCustomNamespaceOverride/Hash.php
+++ b/tests/integration/src/TestCustomNamespaceOverride/Hash.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestNamespaceOverride/Earth.php b/tests/integration/src/TestNamespaceOverride/Earth.php
index 6a7d704..8e23b31 100644
--- a/tests/integration/src/TestNamespaceOverride/Earth.php
+++ b/tests/integration/src/TestNamespaceOverride/Earth.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *
diff --git a/tests/integration/src/TestNamespaceOverride/Moon.php b/tests/integration/src/TestNamespaceOverride/Moon.php
index 27ac197..5ae1534 100644
--- a/tests/integration/src/TestNamespaceOverride/Moon.php
+++ b/tests/integration/src/TestNamespaceOverride/Moon.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * PHP Autoload Override (https://github.com/adriansuter/php-autoload-override)
  *