diff --git a/src/Symfony/Contracts/Tests/Service/ServiceSubscriberTraitTest.php b/src/Symfony/Contracts/Tests/Service/ServiceSubscriberTraitTest.php
index 4d8dbd470af9f..fa7c98cad53af 100644
--- a/src/Symfony/Contracts/Tests/Service/ServiceSubscriberTraitTest.php
+++ b/src/Symfony/Contracts/Tests/Service/ServiceSubscriberTraitTest.php
@@ -57,6 +57,7 @@ public function testSetContainerIsCalledOnParent()
 
     /**
      * @requires PHP 8
+     * @group legacy
      */
     public function testMethodsWithUnionReturnTypesAreIgnored()
     {