diff --git a/mod/quiz/tests/external/reopen_attempt_test.php b/mod/quiz/tests/external/reopen_attempt_test.php
index d81c242e1e2ae..2b0c73f08b805 100644
--- a/mod/quiz/tests/external/reopen_attempt_test.php
+++ b/mod/quiz/tests/external/reopen_attempt_test.php
@@ -16,6 +16,10 @@
 
 namespace mod_quiz\external;
 
+defined('MOODLE_INTERNAL') || die();
+
+require_once(__DIR__ . '/../../../../webservice/tests/helpers.php');
+
 use coding_exception;
 use core_question_generator;
 use externallib_advanced_testcase;