symfony
diff --git a/‎src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php
+7-2Lines changed: 7 additions & 2 deletions b/‎src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php
+7-2Lines changed: 7 additions & 2 deletions
@@ -902,7 +902,7 @@ public function testCustomHasherWithMigrateFrom()
         ]);
     }
 
-    public function testAuthenticatorsStillExistAfterBeingDecorated()
+    public function testAuthenticatorsDecoration()
     {
         $container = $this->getRawContainer();
         $container->setParameter('kernel.debug', true);
@@ -918,7 +918,12 @@ public function testAuthenticatorsStillExistAfterBeingDecorated()
         ]);
         $container->compile();
 
-        $this->assertTrue($container->hasDefinition(TestAuthenticator::class));
+        /** @var Reference[] $managerAuthenticators */
+        $managerAuthenticators = $container->getDefinition('security.authenticator.manager.main')->getArgument(0);
+        $this->assertCount(1, $managerAuthenticators);
+        $this->assertSame('debug.'.TestAuthenticator::class, (string) reset($managerAuthenticators), 'AuthenticatorManagers must be injected traceable authenticators in debug mode.');
+
+        $this->assertTrue($container->hasDefinition(TestAuthenticator::class), 'Original authenticator must still exist in the container so it can be used outside of the AuthenticatorManager’s context.');
     }
 
     protected function getRawContainer()