diff --git a/lib/phpunit/classes/advanced_testcase.php b/lib/phpunit/classes/advanced_testcase.php
index 8995f76d0bf86..dc52be9eaf5f6 100644
--- a/lib/phpunit/classes/advanced_testcase.php
+++ b/lib/phpunit/classes/advanced_testcase.php
@@ -85,7 +85,7 @@ final public function runBare() {
             $debugerror = phpunit_util::display_debugging_messages();
             $this->resetDebugging();
             if ($debugerror) {
-                trigger_error('Unenxpected debugging() call detected.', E_USER_NOTICE);
+                trigger_error('Unexpected debugging() call detected.', E_USER_NOTICE);
             }
 
         } catch (Exception $e) {