symfony
diff --git a/‎src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php
+8-5Lines changed: 8 additions & 5 deletions b/‎src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php
+8-5Lines changed: 8 additions & 5 deletions
@@ -562,7 +562,7 @@ public function testChildContextKeepsOriginalContextCacheKey()
         ];
 
         $normalizer = new class() extends AbstractObjectNormalizerDummy {
-            public ?string $childContextCacheKey = null;
+            public $childContextCacheKey = null;
 
             protected function extractAttributes(object $object, string $format = null, array $context = []): array
             {
@@ -584,14 +584,17 @@ protected function createChildContext(array $parentContext, string $attribute, ?
         };
 
         $serializer = new Serializer([$normalizer]);
-        $serializer->normalize($foobar, null, ['cache_key' => 'hardcoded']);
+        $serializer->normalize($foobar, null, ['cache_key' => 'hardcoded', 'iri' => '/dummy/1']);
+        $firstCacheKey = $normalizer->childContextCacheKey;
 
-        $this->assertSame('hardcoded-foo', $normalizer->childContextCacheKey);
+        $serializer->normalize($foobar, null, ['cache_key' => 'hardcoded', 'iri' => '/dummy/2']);
+        $secondCacheKey = $normalizer->childContextCacheKey;
+
+        $this->assertSame($firstCacheKey, $secondCacheKey);
     }
 
     public function testChildContextCacheKeyStaysFalseWhenOriginalCacheKeyIsFalse()
     {
-        xdebug_break();
         $foobar = new Dummy();
         $foobar->foo = new EmptyDummy();
         $foobar->bar = 'bar';
@@ -603,7 +606,7 @@ public function testChildContextCacheKeyStaysFalseWhenOriginalCacheKeyIsFalse()
         ];
 
         $normalizer = new class() extends AbstractObjectNormalizerDummy {
-            public ?bool $childContextCacheKey = null;
+            public $childContextCacheKey = null;
 
             protected function extractAttributes(object $object, string $format = null, array $context = []): array
             {