diff --git a/test/PMATestCase.php b/test/PMATestCase.php
index 42634405b4..2b00ed97b3 100644
--- a/test/PMATestCase.php
+++ b/test/PMATestCase.php
@@ -28,7 +28,7 @@ class PMATestCase extends PHPUnit_Framework_TestCase
      *
      * @return void
      */
-    public static function mockResponse($param)
+    public function mockResponse($param)
     {
         $restoreInstance = PMA\libraries\Response::getInstance();