diff --git a/lib/pluginlib.php b/lib/pluginlib.php
index 2fee5094726..087b6cb4b6b 100644
--- a/lib/pluginlib.php
+++ b/lib/pluginlib.php
@@ -809,7 +809,6 @@ class available_update_checker {
         $start = mktime(1, 0, 0, date('n', $now), date('j', $now), date('Y', $now)); // 01:00 AM today local time
         if ($now > $start + $offset) {
             $this->cron_mtrace('Regular daily check for available updates ... ', '');
-            cron_trace_time_and_memory();
             $this->cron_execute();
             return;
         }
diff --git a/lib/tests/statslib_test.php b/lib/tests/statslib_test.php
index 2e79f80fce1..316377d96c2 100644
--- a/lib/tests/statslib_test.php
+++ b/lib/tests/statslib_test.php
@@ -28,6 +28,7 @@ defined('MOODLE_INTERNAL') || die();
 global $CFG;
 require_once($CFG->libdir . '/adminlib.php');
 require_once($CFG->libdir . '/statslib.php');
+require_once($CFG->libdir . '/cronlib.php');
 
 /**
  * Test functions that affect daily stats