diff --git a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php
index 2224517db6..277922daef 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php
@@ -14,13 +14,14 @@ namespace Symfony\Bridge\Doctrine\PropertyInfo\Tests;
 use Doctrine\DBAL\Types\Type as DBALType;
 use Doctrine\ORM\EntityManager;
 use Doctrine\ORM\Tools\Setup;
+use PHPUnit\Framework\TestCase;
 use Symfony\Bridge\Doctrine\PropertyInfo\DoctrineExtractor;
 use Symfony\Component\PropertyInfo\Type;
 
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class DoctrineExtractorTest extends \PHPUnit_Framework_TestCase
+class DoctrineExtractorTest extends TestCase
 {
     /**
      * @var DoctrineExtractor
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ConfigCachePassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ConfigCachePassTest.php
index 7f465b2534..a3b602eeaa 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ConfigCachePassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ConfigCachePassTest.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\ConfigCachePass;
 
-class ConfigCachePassTest extends \PHPUnit_Framework_TestCase
+class ConfigCachePassTest extends TestCase
 {
     public function testThatCheckersAreProcessedInPriorityOrder()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/DataCollectorTranslatorPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/DataCollectorTranslatorPassTest.php
index 813fb9f602..b9907d7322 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/DataCollectorTranslatorPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/DataCollectorTranslatorPassTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\DataCollectorTranslatorPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\Translation\TranslatorInterface;
 
-class DataCollectorTranslatorPassTest extends \PHPUnit_Framework_TestCase
+class DataCollectorTranslatorPassTest extends TestCase
 {
     private $container;
     private $dataCollectorTranslatorPass;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/FormPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/FormPassTest.php
index c79147284e..e3bb845ab9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/FormPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/FormPassTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\FormPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
@@ -20,7 +21,7 @@ use Symfony\Component\Form\AbstractType;
 /**
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
-class FormPassTest extends \PHPUnit_Framework_TestCase
+class FormPassTest extends TestCase
 {
     public function testDoNothingIfFormExtensionNotLoaded()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/PropertyInfoPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/PropertyInfoPassTest.php
index c8e252c8fb..46b7b57102 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/PropertyInfoPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/PropertyInfoPassTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\PropertyInfoPass;
 use Symfony\Component\DependencyInjection\Reference;
 
-class PropertyInfoPassTest extends \PHPUnit_Framework_TestCase
+class PropertyInfoPassTest extends TestCase
 {
     public function testServicesAreOrderedAccordingToPriority()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/UnusedTagsPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/UnusedTagsPassTest.php
index 02f5e6b672..b9e8f18845 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/UnusedTagsPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/UnusedTagsPassTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\UnusedTagsPass;
 
-class UnusedTagsPassTest extends \PHPUnit_Framework_TestCase
+class UnusedTagsPassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Kernel/MicroKernelTraitTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Kernel/MicroKernelTraitTest.php
index e1291a426d..2b716150b8 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Kernel/MicroKernelTraitTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Kernel/MicroKernelTraitTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Kernel;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 
-class MicroKernelTraitTest extends \PHPUnit_Framework_TestCase
+class MicroKernelTraitTest extends TestCase
 {
     /**
      * @requires PHP 5.4
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/DelegatingLoaderTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/DelegatingLoaderTest.php
index 31770872a6..bd85b9ed94 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/DelegatingLoaderTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/DelegatingLoaderTest.php
@@ -2,12 +2,13 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Routing;
 
+use PHPUnit\Framework\TestCase;
 use Psr\Log\NullLogger;
 use Symfony\Bundle\FrameworkBundle\Controller\ControllerNameParser;
 use Symfony\Bundle\FrameworkBundle\Routing\DelegatingLoader;
 use Symfony\Component\Config\Loader\LoaderResolver;
 
-class DelegatingLoaderTest extends \PHPUnit_Framework_TestCase
+class DelegatingLoaderTest extends TestCase
 {
     /** @var ControllerNameParser */
     private $controllerNameParser;
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/GuardAuthenticationFactoryTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/GuardAuthenticationFactoryTest.php
index 4c16348502..99647ec183 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/GuardAuthenticationFactoryTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/GuardAuthenticationFactoryTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Bundle\SecurityBundle\Tests\DependencyInjection\Security\Factory;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Bundle\SecurityBundle\DependencyInjection\Security\Factory\GuardAuthenticationFactory;
 use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
 
-class GuardAuthenticationFactoryTest extends \PHPUnit_Framework_TestCase
+class GuardAuthenticationFactoryTest extends TestCase
 {
     /**
      * @dataProvider getValidConfigurationTests
diff --git a/src/Symfony/Component/Config/Tests/Resource/FileExistenceResourceTest.php b/src/Symfony/Component/Config/Tests/Resource/FileExistenceResourceTest.php
index 56ee584b1a..433f65e820 100644
--- a/src/Symfony/Component/Config/Tests/Resource/FileExistenceResourceTest.php
+++ b/src/Symfony/Component/Config/Tests/Resource/FileExistenceResourceTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Config\Tests\Resource;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Resource\FileExistenceResource;
 
-class FileExistenceResourceTest extends \PHPUnit_Framework_TestCase
+class FileExistenceResourceTest extends TestCase
 {
     protected $resource;
     protected $file;
diff --git a/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php b/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php
index 6c12c28a5b..d39742ad88 100644
--- a/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php
+++ b/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Config\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Tests\Resource\ResourceStub;
 use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\Config\ResourceCheckerConfigCache;
 
-class ResourceCheckerConfigCacheTest extends \PHPUnit_Framework_TestCase
+class ResourceCheckerConfigCacheTest extends TestCase
 {
     private $cacheFile = null;
 
diff --git a/src/Symfony/Component/Console/Tests/Helper/ProgressIndicatorTest.php b/src/Symfony/Component/Console/Tests/Helper/ProgressIndicatorTest.php
index 2f72d3094b..c85018dece 100644
--- a/src/Symfony/Component/Console/Tests/Helper/ProgressIndicatorTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/ProgressIndicatorTest.php
@@ -2,13 +2,14 @@
 
 namespace Symfony\Component\Console\Tests\Helper;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Helper\ProgressIndicator;
 use Symfony\Component\Console\Output\StreamOutput;
 
 /**
  * @group time-sensitive
  */
-class ProgressIndicatorTest extends \PHPUnit_Framework_TestCase
+class ProgressIndicatorTest extends TestCase
 {
     public function testDefaultIndicator()
     {
diff --git a/src/Symfony/Component/CssSelector/Tests/CssSelectorConverterTest.php b/src/Symfony/Component/CssSelector/Tests/CssSelectorConverterTest.php
index 624909b41d..a27fadfef1 100644
--- a/src/Symfony/Component/CssSelector/Tests/CssSelectorConverterTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/CssSelectorConverterTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\CssSelector\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\CssSelector\CssSelectorConverter;
 
-class CssSelectorConverterTest extends \PHPUnit_Framework_TestCase
+class CssSelectorConverterTest extends TestCase
 {
     public function testCssToXPath()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowirePassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowirePassTest.php
index 2d34cbff1d..c1d999f599 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowirePassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowirePassTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Compiler\AutowirePass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
@@ -18,7 +19,7 @@ use Symfony\Component\DependencyInjection\Reference;
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class AutowirePassTest extends \PHPUnit_Framework_TestCase
+class AutowirePassTest extends TestCase
 {
     public function testProcess()
     {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/DirectoryLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/DirectoryLoaderTest.php
index 104976166b..5de6577371 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/DirectoryLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/DirectoryLoaderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\DependencyInjection\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Loader\PhpFileLoader;
 use Symfony\Component\DependencyInjection\Loader\IniFileLoader;
@@ -19,7 +20,7 @@ use Symfony\Component\DependencyInjection\Loader\DirectoryLoader;
 use Symfony\Component\Config\Loader\LoaderResolver;
 use Symfony\Component\Config\FileLocator;
 
-class DirectoryLoaderTest extends \PHPUnit_Framework_TestCase
+class DirectoryLoaderTest extends TestCase
 {
     private static $fixturesPath;
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/DependencyInjection/DependencyInjectionExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/DependencyInjection/DependencyInjectionExtensionTest.php
index cfb7fadfa2..0fb83f5dcf 100644
--- a/src/Symfony/Component/Form/Tests/Extension/DependencyInjection/DependencyInjectionExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/DependencyInjection/DependencyInjectionExtensionTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Form\Tests\Extension\DependencyInjection;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
 use Symfony\Component\Form\Extension\DependencyInjection\DependencyInjectionExtension;
 
-class DependencyInjectionExtensionTest extends \PHPUnit_Framework_TestCase
+class DependencyInjectionExtensionTest extends TestCase
 {
     public function testGetTypeExtensions()
     {
diff --git a/src/Symfony/Component/Form/Tests/Util/StringUtilTest.php b/src/Symfony/Component/Form/Tests/Util/StringUtilTest.php
index fbdf84c5b1..2103fa40e5 100644
--- a/src/Symfony/Component/Form/Tests/Util/StringUtilTest.php
+++ b/src/Symfony/Component/Form/Tests/Util/StringUtilTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Form\Tests\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Form\Util\StringUtil;
 
-class StringUtilTest extends \PHPUnit_Framework_TestCase
+class StringUtilTest extends TestCase
 {
     public function testTrim()
     {
diff --git a/src/Symfony/Component/Ldap/Tests/LdapClientTest.php b/src/Symfony/Component/Ldap/Tests/LdapClientTest.php
index acf15b06d6..138740a059 100644
--- a/src/Symfony/Component/Ldap/Tests/LdapClientTest.php
+++ b/src/Symfony/Component/Ldap/Tests/LdapClientTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Ldap\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Ldap\LdapClient;
 use Symfony\Polyfill\Php56\Php56 as p;
 
 /**
  * @requires extension ldap
  */
-class LdapClientTest extends \PHPUnit_Framework_TestCase
+class LdapClientTest extends TestCase
 {
     public function testLdapEscape()
     {
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractors/PhpDocExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractors/PhpDocExtractorTest.php
index b223888ede..1043997482 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractors/PhpDocExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractors/PhpDocExtractorTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\PropertyInfo\Tests\PhpDocExtractors;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyInfo\Extractor\PhpDocExtractor;
 use Symfony\Component\PropertyInfo\Type;
 
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class PhpDocExtractorTest extends \PHPUnit_Framework_TestCase
+class PhpDocExtractorTest extends TestCase
 {
     /**
      * @var PhpDocExtractor
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractors/ReflectionExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractors/ReflectionExtractorTest.php
index 713d9431b4..7818d0dd40 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractors/ReflectionExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractors/ReflectionExtractorTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\PropertyInfo\Tests\Extractor;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyInfo\Extractor\ReflectionExtractor;
 use Symfony\Component\PropertyInfo\Type;
 
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class ReflectionExtractorTest extends \PHPUnit_Framework_TestCase
+class ReflectionExtractorTest extends TestCase
 {
     /**
      * @var ReflectionExtractor
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractors/SerializerExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractors/SerializerExtractorTest.php
index 92d18178ae..b5def4d29b 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractors/SerializerExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractors/SerializerExtractorTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\PropertyInfo\PropertyInfo\Tests\Extractors;
 
 use Doctrine\Common\Annotations\AnnotationReader;
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyInfo\Extractor\SerializerExtractor;
 use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactory;
 use Symfony\Component\Serializer\Mapping\Loader\AnnotationLoader;
@@ -19,7 +20,7 @@ use Symfony\Component\Serializer\Mapping\Loader\AnnotationLoader;
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class SerializerExtractorTest extends \PHPUnit_Framework_TestCase
+class SerializerExtractorTest extends TestCase
 {
     /**
      * @var SerializerExtractor
diff --git a/src/Symfony/Component/PropertyInfo/Tests/PropertyInfoExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/PropertyInfoExtractorTest.php
index 4cd4c04f67..130b8cc52b 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/PropertyInfoExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/PropertyInfoExtractorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\PropertyInfo\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyInfo\PropertyInfoExtractor;
 use Symfony\Component\PropertyInfo\Tests\Fixtures\DummyExtractor;
 use Symfony\Component\PropertyInfo\Tests\Fixtures\NullExtractor;
@@ -19,7 +20,7 @@ use Symfony\Component\PropertyInfo\Type;
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class PropertyInfoExtractorTest extends \PHPUnit_Framework_TestCase
+class PropertyInfoExtractorTest extends TestCase
 {
     /**
      * @var PropertyInfoExtractor
diff --git a/src/Symfony/Component/PropertyInfo/Tests/TypeTest.php b/src/Symfony/Component/PropertyInfo/Tests/TypeTest.php
index 7a990ccffc..9266f9808f 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/TypeTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/TypeTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\PropertyInfo\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\PropertyInfo\Type;
 
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
  */
-class TypeTest extends \PHPUnit_Framework_TestCase
+class TypeTest extends TestCase
 {
     public function testConstruct()
     {
diff --git a/src/Symfony/Component/Routing/Tests/Loader/ObjectRouteLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/ObjectRouteLoaderTest.php
index 50b8d8ff99..408fa0b45c 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/ObjectRouteLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/ObjectRouteLoaderTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Routing\Tests\Loader;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Routing\Loader\ObjectRouteLoader;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 
-class ObjectRouteLoaderTest extends \PHPUnit_Framework_TestCase
+class ObjectRouteLoaderTest extends TestCase
 {
     public function testLoadCallsServiceAndReturnsCollection()
     {
diff --git a/src/Symfony/Component/Routing/Tests/RouteCollectionBuilderTest.php b/src/Symfony/Component/Routing/Tests/RouteCollectionBuilderTest.php
index ece28746e9..058a100d1f 100644
--- a/src/Symfony/Component/Routing/Tests/RouteCollectionBuilderTest.php
+++ b/src/Symfony/Component/Routing/Tests/RouteCollectionBuilderTest.php
@@ -11,12 +11,13 @@
 
 namespace Symfony\Component\Routing\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Routing\RouteCollectionBuilder;
 
-class RouteCollectionBuilderTest extends \PHPUnit_Framework_TestCase
+class RouteCollectionBuilderTest extends TestCase
 {
     public function testImport()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php
index aae3c764af..779aefeea0 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authentication\Provider;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Provider\LdapBindAuthenticationProvider;
 use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
 use Symfony\Component\Security\Core\User\User;
@@ -19,7 +20,7 @@ use Symfony\Component\Ldap\Exception\ConnectionException;
 /**
  * @requires extension ldap
  */
-class LdapBindAuthenticationProviderTest extends \PHPUnit_Framework_TestCase
+class LdapBindAuthenticationProviderTest extends TestCase
 {
     /**
      * @expectedException        \Symfony\Component\Security\Core\Exception\BadCredentialsException
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php
index cbd2755d5a..70e3226ece 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php
@@ -11,11 +11,12 @@
 
 namespace Symfony\Component\Security\Core\Tests\Authorization\Voter;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
 use Symfony\Component\Security\Core\Authorization\Voter\Voter;
 use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
 
-class VoterTest extends \PHPUnit_Framework_TestCase
+class VoterTest extends TestCase
 {
     protected $token;
 
diff --git a/src/Symfony/Component/Security/Core/Tests/Exception/CustomUserMessageAuthenticationExceptionTest.php b/src/Symfony/Component/Security/Core/Tests/Exception/CustomUserMessageAuthenticationExceptionTest.php
index 408dd2a169..5776a99101 100644
--- a/src/Symfony/Component/Security/Core/Tests/Exception/CustomUserMessageAuthenticationExceptionTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Exception/CustomUserMessageAuthenticationExceptionTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Security\Core\Tests\Exception;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\Exception\CustomUserMessageAuthenticationException;
 
-class CustomUserMessageAuthenticationExceptionTest extends \PHPUnit_Framework_TestCase
+class CustomUserMessageAuthenticationExceptionTest extends TestCase
 {
     public function testConstructWithSAfeMessage()
     {
diff --git a/src/Symfony/Component/Security/Core/Tests/User/LdapUserProviderTest.php b/src/Symfony/Component/Security/Core/Tests/User/LdapUserProviderTest.php
index a8fc2618ea..0e2a1ac6c7 100644
--- a/src/Symfony/Component/Security/Core/Tests/User/LdapUserProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/User/LdapUserProviderTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Security\Core\Tests\User;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Core\User\LdapUserProvider;
 use Symfony\Component\Ldap\Exception\ConnectionException;
 
 /**
  * @requires extension ldap
  */
-class LdapUserProviderTest extends \PHPUnit_Framework_TestCase
+class LdapUserProviderTest extends TestCase
 {
     /**
      * @expectedException \Symfony\Component\Security\Core\Exception\UsernameNotFoundException
diff --git a/src/Symfony/Component/Security/Guard/Tests/Authenticator/FormLoginAuthenticatorTest.php b/src/Symfony/Component/Security/Guard/Tests/Authenticator/FormLoginAuthenticatorTest.php
index 3dbbf845c5..b6187f2e37 100644
--- a/src/Symfony/Component/Security/Guard/Tests/Authenticator/FormLoginAuthenticatorTest.php
+++ b/src/Symfony/Component/Security/Guard/Tests/Authenticator/FormLoginAuthenticatorTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Guard\Tests\Authenticator;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Core\User\UserInterface;
@@ -20,7 +21,7 @@ use Symfony\Component\Security\Guard\Authenticator\AbstractFormLoginAuthenticato
 /**
  * @author Jean Pasdeloup <jpasdeloup@sedona.fr>
  */
-class FormLoginAuthenticatorTest extends \PHPUnit_Framework_TestCase
+class FormLoginAuthenticatorTest extends TestCase
 {
     private $requestWithoutSession;
     private $requestWithSession;
diff --git a/src/Symfony/Component/Security/Guard/Tests/Firewall/GuardAuthenticationListenerTest.php b/src/Symfony/Component/Security/Guard/Tests/Firewall/GuardAuthenticationListenerTest.php
index dee7ad1695..943ca49247 100644
--- a/src/Symfony/Component/Security/Guard/Tests/Firewall/GuardAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Guard/Tests/Firewall/GuardAuthenticationListenerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Guard\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Security\Guard\Firewall\GuardAuthenticationListener;
@@ -20,7 +21,7 @@ use Symfony\Component\Security\Core\Exception\AuthenticationException;
 /**
  * @author Ryan Weaver <weaverryan@gmail.com>
  */
-class GuardAuthenticationListenerTest extends \PHPUnit_Framework_TestCase
+class GuardAuthenticationListenerTest extends TestCase
 {
     private $authenticationManager;
     private $guardAuthenticatorHandler;
diff --git a/src/Symfony/Component/Security/Guard/Tests/GuardAuthenticatorHandlerTest.php b/src/Symfony/Component/Security/Guard/Tests/GuardAuthenticatorHandlerTest.php
index 58a3e1790e..b46bc4a78d 100644
--- a/src/Symfony/Component/Security/Guard/Tests/GuardAuthenticatorHandlerTest.php
+++ b/src/Symfony/Component/Security/Guard/Tests/GuardAuthenticatorHandlerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Security\Guard\Tests;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Security\Guard\GuardAuthenticatorHandler;
@@ -18,7 +19,7 @@ use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Http\Event\InteractiveLoginEvent;
 use Symfony\Component\Security\Http\SecurityEvents;
 
-class GuardAuthenticatorHandlerTest extends \PHPUnit_Framework_TestCase
+class GuardAuthenticatorHandlerTest extends TestCase
 {
     private $tokenStorage;
     private $dispatcher;
diff --git a/src/Symfony/Component/Security/Guard/Tests/Provider/GuardAuthenticationProviderTest.php b/src/Symfony/Component/Security/Guard/Tests/Provider/GuardAuthenticationProviderTest.php
index e7e323a178..ed3920533f 100644
--- a/src/Symfony/Component/Security/Guard/Tests/Provider/GuardAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Guard/Tests/Provider/GuardAuthenticationProviderTest.php
@@ -11,13 +11,14 @@
 
 namespace Symfony\Component\Security\Guard\Tests\Provider;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Security\Guard\Provider\GuardAuthenticationProvider;
 use Symfony\Component\Security\Guard\Token\PostAuthenticationGuardToken;
 
 /**
  * @author Ryan Weaver <weaverryan@gmail.com>
  */
-class GuardAuthenticationProviderTest extends \PHPUnit_Framework_TestCase
+class GuardAuthenticationProviderTest extends TestCase
 {
     private $userProvider;
     private $userChecker;
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/DigestAuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/DigestAuthenticationListenerTest.php
index 2a29db7012..495dae4262 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/DigestAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/DigestAuthenticationListenerTest.php
@@ -2,12 +2,13 @@
 
 namespace Symfony\Component\Security\Http\Tests\Firewall;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
 use Symfony\Component\Security\Http\EntryPoint\DigestAuthenticationEntryPoint;
 use Symfony\Component\Security\Http\Firewall\DigestAuthenticationListener;
 
-class DigestAuthenticationListenerTest extends \PHPUnit_Framework_TestCase
+class DigestAuthenticationListenerTest extends TestCase
 {
     public function testHandleWithValidDigest()
     {
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php
index a6d3f40f23..f4fb882ef4 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Serializer\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Encoder\ChainDecoder;
 
-class ChainDecoderTest extends \PHPUnit_Framework_TestCase
+class ChainDecoderTest extends TestCase
 {
     const FORMAT_1 = 'format1';
     const FORMAT_2 = 'format2';
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php
index 4fc6b25f9b..2bdce84080 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Serializer\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Encoder\ChainEncoder;
 use Symfony\Component\Serializer\Encoder\NormalizationAwareInterface;
 
-class ChainEncoderTest extends \PHPUnit_Framework_TestCase
+class ChainEncoderTest extends TestCase
 {
     const FORMAT_1 = 'format1';
     const FORMAT_2 = 'format2';
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/JsonDecodeTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/JsonDecodeTest.php
index 7818aeaf55..774064d43a 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/JsonDecodeTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/JsonDecodeTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Serializer\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Encoder\JsonDecode;
 use Symfony\Component\Serializer\Encoder\JsonEncoder;
 
-class JsonDecodeTest extends \PHPUnit_Framework_TestCase
+class JsonDecodeTest extends TestCase
 {
     /** @var \Symfony\Component\Serializer\Encoder\JsonDecode */
     private $decode;
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncodeTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncodeTest.php
index 291c0f0965..ed33233fb4 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncodeTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncodeTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Serializer\Tests\Encoder;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Encoder\JsonEncode;
 use Symfony\Component\Serializer\Encoder\JsonEncoder;
 
-class JsonEncodeTest extends \PHPUnit_Framework_TestCase
+class JsonEncodeTest extends TestCase
 {
     private $encoder;
 
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/ArrayDenormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/ArrayDenormalizerTest.php
index 5edb223577..e5876a04e1 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/ArrayDenormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/ArrayDenormalizerTest.php
@@ -11,10 +11,11 @@
 
 namespace Symfony\Component\Serializer\Tests\Normalizer;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Serializer\Normalizer\ArrayDenormalizer;
 use Symfony\Component\Serializer\SerializerInterface;
 
-class ArrayDenormalizerTest extends \PHPUnit_Framework_TestCase
+class ArrayDenormalizerTest extends TestCase
 {
     /**
      * @var ArrayDenormalizer
diff --git a/src/Symfony/Component/Translation/Tests/Util/ArrayConverterTest.php b/src/Symfony/Component/Translation/Tests/Util/ArrayConverterTest.php
index 5c198bb6bc..dbb5424f1c 100644
--- a/src/Symfony/Component/Translation/Tests/Util/ArrayConverterTest.php
+++ b/src/Symfony/Component/Translation/Tests/Util/ArrayConverterTest.php
@@ -11,9 +11,10 @@
 
 namespace Symfony\Component\Translation\Tests\Util;
 
+use PHPUnit\Framework\TestCase;
 use Symfony\Component\Translation\Util\ArrayConverter;
 
-class ArrayConverterTest extends \PHPUnit_Framework_TestCase
+class ArrayConverterTest extends TestCase
 {
     /**
      * @dataProvider messagesData