[paceaux]

To be totally honest, I originally didn't have any guidance around having a class name for .qa (this was a gist long before I made it a blog post and I'd been sharing the gist with teams for years). I had a boss point out that sometimes for [reasons] he would have to add selectors to things just for Selenium tests, and when that happened, he like using .qa because then it was obvious to him and anyone else it had to be deleted later.

BTW, the _reason_ he had to add classnames was because we worked in enterprise content management and there were all sorts of situations where, for WHATEVER reason, we couldn't change the markup, or we could only modify the markup in VERY specific ways via the CMS. So finding a way to stick `qa` on an element was a more straightforward path than writing some ridiculous selector like `body > div > div > header ~ article:first-child`

Suffice to say, YES, I agree that adding a class just so you can run a test is bad, but, we hit situations where we had to, and when that happened, it was worth while to have a convention for knowing how to identify classes that served just that purpose.