> I want to be sure my code works before I submit it for review.

No kidding. I mean, "it works" is table stakes, to the point I can't even imagine going to review without having tested things locally at least to be confident in my changes. The self-review for me is to force me to digest my whole patch and make sure I haven't left a bunch of TODO comments or sloppy POC code in the branch. I'd be embarrassed to get caught leaving commented code in my branch - I'd be mortified if somehow I submitted a PR that just straight up didn't work.