diff --git a/http_client.rst b/http_client.rst
index 9e9a74b973b..9cd9b80208c 100644
--- a/http_client.rst
+++ b/http_client.rst
@@ -2192,12 +2192,13 @@ test it in a real application::
             // ... other checks
 
             $responseJson = $response->getContent();
-            $responseData = json_decode($responseJson, true, 512, JSON_THROW_ON_ERROR);
 
-            return $responseData;
+            return json_decode($responseJson, true, 512, JSON_THROW_ON_ERROR);
         }
     }
 
+.. code-block:: php
+
     // ExternalArticleServiceTest.php
     use PHPUnit\Framework\TestCase;
     use Symfony\Component\HttpClient\MockHttpClient;