I think it largely manifests as concerns that good performances / test scores are inflated / illegitimate for some reason, and I seem to find a reason for why they could be in almost every case. It's probably why I've kept taking ability tests like the pre-1994 SAT lol
I'm not really afraid of being exposed as fraudulent, though. But I can certainly feel afraid of actually being fraudulent, which is painfully apparent to anyone who's been friends with me lol