diff --git a/src/Illuminate/Testing/AssertableJsonString.php b/src/Illuminate/Testing/AssertableJsonString.php
index 4be1299180b3..748b71ab021f 100644
--- a/src/Illuminate/Testing/AssertableJsonString.php
+++ b/src/Illuminate/Testing/AssertableJsonString.php
@@ -211,8 +211,6 @@ public function assertMissingExact(array $data)
             'within'.PHP_EOL.PHP_EOL.
             "[{$actual}]."
         );
-
-        return $this;
     }
 
     /**