Use the replace tool to validate that the replace still works after applying the patch: Add some text to a label in a course. e.g. ' http://linkedin.com' Use the /tool/replace/ to search for ' http://'  and replace it with ' https://' Check that the label in the course now contains ' https://linkedin.com' It's worth noting that unit tests already cover the replace_all_test() function well.   It would also be good to do a test with all dbs that support replace_all_text() with a larger dataset. Possibly by doing an http -> https migration testing that performance is improved after this patch is applied. This works really well on postgres but have not tested mysql or MS Sql.