diff --git a/grade/tests/output/general_action_bar_test.php b/grade/tests/output/general_action_bar_test.php
index d060ff5bf6f..d7ff12e636d 100644
--- a/grade/tests/output/general_action_bar_test.php
+++ b/grade/tests/output/general_action_bar_test.php
@@ -30,6 +30,14 @@ use moodle_url;
  */
 class general_action_bar_test extends advanced_testcase {
 
+    /**
+     * Load required test libraries
+     */
+    public static function setUpBeforeClass(): void {
+        global $CFG;
+        require_once("{$CFG->dirroot}/grade/lib.php");
+    }
+
     /**
      * Search array $options for an element which is an array containing 'name' => $name.
      *