So, I get this against me so now and then, I got this yesterday again.
Is this like a shit test or what?
Usually I like: great, what now? Lets just make out more then

Any way of dealing with it?

it is asd issue, she doesn't want to feel judged

you can redirect the issue, you can handle it earlier setting out the frame that you hate judgemental people, and you like sexually open people etc. etc., set out frames for what you like first, that way if she follows the frame she knows you will only judge her in a positive way and she will have your approval, becareful with this cause if you contradict yourself there is a good chance you get challenged with a ''congruence test'' ask ''shit test''

but to answer your question, no this is not really a shit test, nor is I don't blah blah blah on the first date, or it takes x amount of time until I have sex, or we are not having sex tonight, or anything similar, it is just the girls asd flareing up and she doesn't want to feel like she is easy, so she has to put up some form of verbal resistance to re-assure herself that anything that happens in your fault not hers, she wants some form of probable deniability and to not feel judged

you can just corner it right away also and just say, listen, I understand, I like you the way you are already, if you are trying to say or do things just to get me to like you, stop it, I like girls who are just themselves

wing it from there

I am hardcore direct and I never got this response...

I believe you should exude more confidence ( you will get this with time ) , yet if I ever encounter this type of response my reply would be :

- You can act how you want , but all I am doing is my job as a man ( after this perform a takeaway , but only if you want )

test it and tell me how it works.

You whisper something in her ear like "you know you want it" seductively and then in your normal voice- "Yeah, you're probably right. This is wrong we shoudn't be doing this. It's too naughty. By being passive and emphasizing these words, leaves the imprint in her mind that it's rebellious and makes her WANT it more than ever.

Or

Take the direct approach:

Her: I'm not a slut.
You: Yes you are, you skank. You're a slutty cunt and you know it. Don't fight it- git ova here.
Her:..no I don't...okay fine.

I got this one time after meeting a girl and 30 minutes later having her naked in my bed. She said "I'm not easy" after I started to undress her.

I just said "no one's judging, let's just have a good time" and was able to F close. I'm sure others will have better suggestions, but it worked for me.