EDIT:
"I already know they do; they are men" [which insinuates that you do it too, because you are a man]. Script, officially flipped.
Sometimes in this type of situation, where it's such a blatant sh!t test and they're pushing the issue, I simply call them out, straight up, with something like 'Are you trying to test me?', in a very playful way, with a big fat grin on my face. You should see them squirm and turn in to the little girls that they really are in their own subconscious. For me this is one of the most powerful extinguishers of any sh!t test - simply call their hand. I garuntee, 99% of the time, they'll deny and then fold and the conversation will revert to normal. So few men are aware even of the concept of a woman's test, let alone how to identify and deal with one, women I've met are immediately dumbfounded by a man who openly identifies them to her face.
If it escalates further or she continues, something very dismissive like, 'This is a pretty boring conversation', usually ties things up, beacuse it is boring when they test like that in public. Just women showing everyone up, mainly themselves.