Test 1 Open your config.php in your preferred editor At the top of the file, just beneath the PHP open tag ( <?php ) add: define('CACHE_DISABLE_ALL', true); Log in as editing teacher or above Navigate to a course From the cog, choose More Navigate to Question bank -> Questions Create a new question (any question will do) Locate the newly created question in the question bank From the Edit menu, choose "Preview" Confirm that a new window opened Confirm that no errors were shown on the page Test 2 Download the attached testcache.php and save it in the Root of you Moodle install where you run PHPunit. Run it in the CLI: php testcache.php nocache . Confirm that there were no assertion failures