Performance test Before applying the patch Turn on performance debugging in config.php: $CFG->perfdebug = 15; Load any page, reload it a couple times to get everything warm and look at DB reads in the footer (eg I see 48) After applying the patch Apply the patch Reload the same page several times Confirm that the DB reads went down by 2 (e.g. I see 46 instead of 48) Upgrade test Open the version.php file in your editor Find the $version variable and increment it by one at the end Run an upgrade in the UI (visit /admin) Confirm that there were no errors Increment the version number in $version again Perform a CLI upgrade: php admin/cli/upgrade.php Confirm that there were no errors Installation test Ensure that the code is up-to-date and clean: git checkout . git reset --hard origin/[branch] git clean -df Uninstall your current site and remove the config.php Perform a fresh install via the UI Confirm that there were no errors Drop the database again but retain the config.php Perform a fresh install via the UI Confirm that there were no errors Uninstall your current site and remove the config.php Perform a fresh install via the CLI using php admin/cli/install.php Confirm that there were no errors Drop the database again but retain the config.php Perform a fresh install via the CLI using php admin/cli/install_database.php Confirm that there were no errors