diff --git a/tests/external/import_question_test.php b/tests/external/import_question_test.php
index 75b8661..b759a88 100644
--- a/tests/external/import_question_test.php
+++ b/tests/external/import_question_test.php
@@ -29,6 +29,7 @@
 global $CFG;
 require_once($CFG->dirroot . '/question/engine/tests/helpers.php');
 require_once($CFG->dirroot . '/webservice/tests/helpers.php');
+require_once($CFG->dirroot . '/lib/externallib.php');
 require_once($CFG->dirroot . '/files/externallib.php');
 require_once($CFG->dirroot. '/question/bank/gitsync/lib.php');