diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/SerializerCacheWarmerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/SerializerCacheWarmerTest.php
index 51c979c597..e0ac2485b0 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/SerializerCacheWarmerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/SerializerCacheWarmerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\CacheWarmer;
 
+use Symfony\Bridge\PhpUnit\ForwardCompatTestTrait;
 use Symfony\Bundle\FrameworkBundle\CacheWarmer\SerializerCacheWarmer;
 use Symfony\Bundle\FrameworkBundle\Tests\TestCase;
 use Symfony\Component\Cache\Adapter\ArrayAdapter;
@@ -22,6 +23,8 @@ use Symfony\Component\Serializer\Mapping\Loader\YamlFileLoader;
 
 class SerializerCacheWarmerTest extends TestCase
 {
+    use ForwardCompatTestTrait;
+
     public function testWarmUp()
     {
         if (!class_exists(CacheClassMetadataFactory::class) || !method_exists(XmlFileLoader::class, 'getMappedClasses') || !method_exists(YamlFileLoader::class, 'getMappedClasses')) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/ValidatorCacheWarmerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/ValidatorCacheWarmerTest.php
index ad0feb33ff..868bd83cf7 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/ValidatorCacheWarmerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/ValidatorCacheWarmerTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\CacheWarmer;
 
+use Symfony\Bridge\PhpUnit\ForwardCompatTestTrait;
 use Symfony\Bundle\FrameworkBundle\CacheWarmer\ValidatorCacheWarmer;
 use Symfony\Bundle\FrameworkBundle\Tests\TestCase;
 use Symfony\Component\Cache\Adapter\ArrayAdapter;
@@ -21,6 +22,8 @@ use Symfony\Component\Validator\ValidatorBuilder;
 
 class ValidatorCacheWarmerTest extends TestCase
 {
+    use ForwardCompatTestTrait;
+
     public function testWarmUp()
     {
         $validatorBuilder = new ValidatorBuilder();
diff --git a/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php b/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
index ea7e0e7bbf..52e02f6667 100644
--- a/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
+++ b/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Intl\Tests\NumberFormatter;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Bridge\PhpUnit\ForwardCompatTestTrait;
 use Symfony\Component\Intl\Globals\IntlGlobals;
 use Symfony\Component\Intl\NumberFormatter\NumberFormatter;
 use Symfony\Component\Intl\Util\IntlTestHelper;
@@ -22,6 +23,8 @@ use Symfony\Component\Intl\Util\IntlTestHelper;
  */
 abstract class AbstractNumberFormatterTest extends TestCase
 {
+    use ForwardCompatTestTrait;
+
     /**
      * @dataProvider formatCurrencyWithDecimalStyleProvider
      */