I would be so devastated if I told a coworker that I had imposter syndrome and they were like, "wait, you think that we think you're good at your job?"
My boss told me himself that I probably have impostor syndrome. Ever since then, I lose sleep wondering how much he regrets saying that. By now, he surely realises that I actually am an impostor, but our labour laws are too good and he can't fire me.
God, that quote is forever my all time favorite. Never fails to make me laugh. Every once in a while I gaslight a friend, but like absurdly and obviously. Within a few minutes they ask, "wait, are you gaslighting me?!" And I respond with that quote, to their sighs and chuckles.