Fatal error: Uncaught Error: Class "advanced_testcase" not found in C:\Apache24\htdocs\moodle\admin\tool\customlang\tests\local\mlang\langstring_test.php:39 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\admin\tool\customlang\tests\local\mlang\langstring_test.php on line 39