diff --git a/.travis.yml b/.travis.yml
index bfc4ae3..1433c10 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -35,7 +35,8 @@ install:
 script:
     - /tmp/php-parallel-lint/parallel-lint -e php,phpt --exclude tests/temp src tests
     - vendor/bin/tester -s -p php -c tests/php.ini tests
-    - /tmp/phpstan/phpstan.phar analyse -c tests/phpstan.neon -l 7 src tests
+    - /tmp/phpstan/phpstan.phar analyse -c tests/phpstan.neon -l 7 src
+    - /tmp/phpstan/phpstan.phar analyse -c tests/phpstan.tests.neon -l 7 tests
 
 after_failure:
     - for i in $(find tests -name \*.actual); do echo "--- $i"; cat $i; echo; echo; done
diff --git a/tests/EmailAddress/EmailAddressTest.phpt b/tests/EmailAddress/EmailAddressTest.phpt
index 9f4286d..14c312c 100644
--- a/tests/EmailAddress/EmailAddressTest.phpt
+++ b/tests/EmailAddress/EmailAddressTest.phpt
@@ -5,7 +5,7 @@ namespace NepadaTests\EmailAddress;
 
 use Nepada\EmailAddress\EmailAddress;
 use Nepada\EmailAddress\InvalidEmailAddressException;
-use Tester;
+use NepadaTests\TestCase;
 use Tester\Assert;
 
 require_once __DIR__ . '/../bootstrap.php';
@@ -14,7 +14,7 @@ require_once __DIR__ . '/../bootstrap.php';
 /**
  * @testCase
  */
-class EmailAddressTest extends Tester\TestCase
+class EmailAddressTest extends TestCase
 {
 
     /**
diff --git a/tests/TestCase.php b/tests/TestCase.php
new file mode 100644
index 0000000..e31201b
--- /dev/null
+++ b/tests/TestCase.php
@@ -0,0 +1,20 @@
+<?php
+declare(strict_types = 1);
+
+namespace NepadaTests;
+
+use Tester;
+
+abstract class TestCase extends Tester\TestCase
+{
+
+    public function run(): void
+    {
+        if ($_ENV['IS_PHPSTAN'] ?? false) {
+            return;
+        }
+
+        parent::run();
+    }
+
+}
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index b34829f..46805be 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -1,30 +1,26 @@
 <?php
 declare(strict_types = 1);
 
-// The Nette Tester command-line runner can be
-// invoked through the command: ../vendor/bin/tester .
+require __DIR__ . '/../vendor/autoload.php';
 
-if (@!include __DIR__ . '/../vendor/autoload.php') {
-    echo 'Install Nette Tester using `composer install`';
-    exit(1);
+// detect PHPStan
+if (!isset($_ENV['IS_PHPSTAN'])) {
+    $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
+    $_ENV['IS_PHPSTAN'] = (bool) preg_match('~[/\\\\]phpstan(?:\.phar)?$~', end($trace)['file'] ?? '');
 }
 
 
 // configure environment
-Tester\Environment::setup();
-date_default_timezone_set('Europe/Prague');
+if (!$_ENV['IS_PHPSTAN']) {
+    Tester\Environment::setup();
+    date_default_timezone_set('Europe/Prague');
+}
 
 
 // create temporary directory
 define('TEMP_DIR', __DIR__ . '/temp/' . (isset($_SERVER['argv']) ? md5(serialize($_SERVER['argv'])) : getmypid()));
-@mkdir(dirname(TEMP_DIR)); // @ - directory may already exist
-Tester\Helpers::purge(TEMP_DIR);
-ini_set('session.save_path', TEMP_DIR);
-
-
-$_SERVER = array_intersect_key(
-    $_SERVER,
-    array_flip(['PHP_SELF', 'SCRIPT_NAME', 'SERVER_ADDR', 'SERVER_SOFTWARE', 'HTTP_HOST', 'DOCUMENT_ROOT', 'OS', 'argc', 'argv'])
-);
-$_SERVER['REQUEST_TIME'] = 1234567890;
-$_ENV = $_GET = $_POST = [];
+if (!$_ENV['IS_PHPSTAN']) {
+    @mkdir(dirname(TEMP_DIR)); // @ - directory may already exist
+    Tester\Helpers::purge(TEMP_DIR);
+    ini_set('session.save_path', TEMP_DIR);
+}
diff --git a/tests/phpstan.neon b/tests/phpstan.neon
index 778b08b..d098a03 100644
--- a/tests/phpstan.neon
+++ b/tests/phpstan.neon
@@ -1,8 +1,8 @@
 includes:
+    - phar://phpstan.phar/vendor/pepakriz/phpstan-exception-rules/extension.neon
     - phar://phpstan.phar/vendor/phpstan/phpstan-nette/extension.neon
     - phar://phpstan.phar/vendor/phpstan/phpstan-nette/rules.neon
     - phar://phpstan.phar/vendor/phpstan/phpstan-strict-rules/rules.neon
-    - phar://phpstan.phar/vendor/pepakriz/phpstan-exception-rules/extension.neon
 
 parameters:
     exceptionRules:
@@ -12,7 +12,3 @@ parameters:
         ignoredExceptions:
             - LogicException
             - Nette\InvalidStateException
-
-    excludes_analyse:
-        - %currentWorkingDirectory%/tests/bootstrap.php
-        - %currentWorkingDirectory%/tests/temp/*
diff --git a/tests/phpstan.tests.neon b/tests/phpstan.tests.neon
new file mode 100644
index 0000000..5e26222
--- /dev/null
+++ b/tests/phpstan.tests.neon
@@ -0,0 +1,16 @@
+includes:
+    - phar://phpstan.phar/vendor/phpstan/phpstan-nette/extension.neon
+    - phar://phpstan.phar/vendor/phpstan/phpstan-nette/rules.neon
+    - phar://phpstan.phar/vendor/phpstan/phpstan-strict-rules/rules.neon
+
+parameters:
+    fileExtensions:
+        - php
+        - phpt
+
+    autoload_directories:
+        - %currentWorkingDirectory%/tests
+
+    excludes_analyse:
+        - %currentWorkingDirectory%/tests/bootstrap.php
+        - %currentWorkingDirectory%/tests/temp/*