symfony
diff --git a/‎src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTestCase.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTestCase.php
+15Lines changed: 15 additions & 0 deletions b/‎src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTestCase.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTestCase.php
+15Lines changed: 15 additions & 0 deletions
@@ -69,6 +69,7 @@
 use Symfony\Component\Serializer\Mapping\Loader\AttributeLoader;
 use Symfony\Component\Serializer\Mapping\Loader\XmlFileLoader;
 use Symfony\Component\Serializer\Mapping\Loader\YamlFileLoader;
+use Symfony\Component\Serializer\Normalizer\BackedEnumNormalizer;
 use Symfony\Component\Serializer\Normalizer\ConstraintViolationListNormalizer;
 use Symfony\Component\Serializer\Normalizer\DataUriNormalizer;
 use Symfony\Component\Serializer\Normalizer\DateIntervalNormalizer;
@@ -1610,6 +1611,20 @@ public function testTranslatableNormalizerRegistered()
         $this->assertEquals(new Reference('translator'), $definition->getArgument('$translator'));
     }
 
+    /**
+     * @see https://github.com/symfony/symfony/issues/54478
+     */
+    public function testBackedEnumNormalizerRegistered()
+    {
+        $container = $this->createContainerFromFile('full');
+
+        $definition = $container->getDefinition('serializer.normalizer.backed_enum');
+        $tag = $definition->getTag('serializer.normalizer');
+
+        $this->assertSame(BackedEnumNormalizer::class, $definition->getClass());
+        $this->assertSame(-915, $tag[0]['priority']);
+    }
+
     public function testSerializerCacheActivated()
     {
         $container = $this->createContainerFromFile('serializer_enabled');