Generic Notes These testing instructions should be carried out twice (once with jsrev = -1, once without) to confirm that the correct versions of JS are used and work as expected. Tip : Open your browser's developer toolkit, open the 'Network' activity tab, and restrict to 'Scripts'. Note : You may find that the script you're looking for is included with a number of other scripts - this is because of our combo loading. You can turn off comboloading to make it easier to check the relevant script by setting $CFG->yuicomboloading = false; , but you should check that functionality works with combo loading enabled. To test the minified code: Required settings: // Ensure you aren't overriding $CFG->jsrev $CFG->debug = 0; Notes Check that the minified version of this module is loaded. It will have -min.js in the filename but please ensure content is also be minified and to test the non-minified code: Required settings: $CFG->jsrev = -1; $CFG->debug = (E_ALL | E_STRICT); Notes Check that the non-minified version of this module is loaded. It will have -debug.js in the filename and the file content should not be minified. Module-specific test instructions