diff --git a/tests/questiontype_test.php b/tests/questiontype_test.php
index 596e25b..32e22bf 100644
--- a/tests/questiontype_test.php
+++ b/tests/questiontype_test.php
@@ -27,6 +27,7 @@
 global $CFG;
 
 require_once($CFG->dirroot . '/question/type/varnumunit/questiontype.php');
+require_once($CFG->dirroot . '/question/engine/tests/helpers.php');
 require_once($CFG->dirroot . '/question/format/xml/format.php');
 
 /**