diff --git a/setup/src/Magento/Setup/Controller/UrlCheck.php b/setup/src/Magento/Setup/Controller/UrlCheck.php
index 5885b721a9c28bf37b0df0b7f423b48a4f42396c..b0fb1ac729681f130519763669b6ed746c44fef1 100644
--- a/setup/src/Magento/Setup/Controller/UrlCheck.php
+++ b/setup/src/Magento/Setup/Controller/UrlCheck.php
@@ -52,6 +52,6 @@ class UrlCheck extends AbstractActionController
             }
         }
 
-        return new JsonModel(array_merge($result));
+        return new JsonModel($result);
     }
 }