diff --git a/tests/phpunit/includes/utils.php b/tests/phpunit/includes/utils.php
index cb28fb1e91..16b331b6a6 100644
--- a/tests/phpunit/includes/utils.php
+++ b/tests/phpunit/includes/utils.php
@@ -461,7 +461,7 @@ function gen_tests_array( $name, $array ) {
 /**
  * Use to create objects by yourself
  */
-class MockClass {}
+class MockClass extends stdClass {}
 
 /**
  * Drops all tables from the WordPress database