Test setup Create a new site and ensure that it does NOT include this change The easiest way to do this would be: mdk create --name mdl77308 -i -e pgsql Navigate to site administration > Plugins > Text editors > Manage editors Enable the Legacy TinyMCE editor Put it near the top of the list Open the user menu > Prefences page Open the Editor preferences Choose the Legacy TIny editor Now switch to the integration code: git remote add integration ~/.moodle-sdk/integration.git git fetch integration git reset --hard integration/master Test that the editor is not removed if it is still present Clone the plugin code back to it's old location: git clone https://github.com/moodlehq/moodle-editor_tinymce lib/editor/tinymce Run the upgrade Navigate to site administration > Plugins > Text editors > Manage text editors Confirm that the Legacy TinyMCE editor is still enabled Confirm that it is in the same order as before Open the user menu > Prefences page Open the Editor preferences Confirm that your preference is still set to TinyMCE Removal test Reset your branch to the code before removal. If you've followed the instructions so far that should be: rm -rf lib/editor/tinymce git reset --hard origin/master Run the version resetter: mdk run version php admin/cli/upgrade.php Check out the code under test again git reset --hard integration/master Confirm that TinyMCE is no longer present: # The following should error: ls -l lib/editor/tinymce Run the upgrade again Navigate to site administration > Plugins > Text editors > Manage text editors Confirm that the Legacy TinyMCE editor is no longer present Confirm that you can move the top editor down the list Open the user menu > Prefences page Open the Editor preferences Confirm that your preference is now set to the Default editor