diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/config/serializer.php b/src/Symfony/Bundle/FrameworkBundle/Resources/config/serializer.php
index f70d60429e90f..0e0031fbaf1f1 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/config/serializer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/config/serializer.php
@@ -116,7 +116,7 @@
 
         ->set('serializer.normalizer.translatable', TranslatableNormalizer::class)
             ->args(['$translator' => service('translator')])
-            ->tag('serializer.normalizer', ['priority' => -890])
+            ->tag('serializer.normalizer', ['priority' => -920])
 
         ->set('serializer.normalizer.form_error', FormErrorNormalizer::class)
             ->tag('serializer.normalizer', ['priority' => -915])
@@ -219,6 +219,6 @@
             ])
 
         ->set('serializer.normalizer.backed_enum', BackedEnumNormalizer::class)
-            ->tag('serializer.normalizer', ['priority' => -880])
+            ->tag('serializer.normalizer', ['priority' => -915])
     ;
 };
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTestCase.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTestCase.php
index 7e30456900ea7..55de5cc247652 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTestCase.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTestCase.php
@@ -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;
@@ -1606,10 +1607,24 @@ public function testTranslatableNormalizerRegistered()
         $tag = $definition->getTag('serializer.normalizer');
 
         $this->assertSame(TranslatableNormalizer::class, $definition->getClass());
-        $this->assertSame(-890, $tag[0]['priority']);
+        $this->assertSame(-920, $tag[0]['priority']);
         $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');