diff --git a/src/Symfony/Component/AssetMapper/Tests/AssetMapperDevServerSubscriberFunctionalTest.php b/src/Symfony/Component/AssetMapper/Tests/AssetMapperDevServerSubscriberFunctionalTest.php
index 558dfc76725b8..c6b2e7ecae9a6 100644
--- a/src/Symfony/Component/AssetMapper/Tests/AssetMapperDevServerSubscriberFunctionalTest.php
+++ b/src/Symfony/Component/AssetMapper/Tests/AssetMapperDevServerSubscriberFunctionalTest.php
@@ -46,7 +46,7 @@ public function testGettingAssetWithNonAsciiFilenameWorks()
         /* voilà.css */
         body {}
 
-        EOF, $response->getContent());
+        EOF, $client->getInternalResponse()->getContent());
     }
 
     public function test404OnUnknownAsset()