Getting tested in a few weeks and was wondering if I should mention I think I also have ASD?

So I have known for a few years I’m most likely audhd but autism testing is not very accessible where I live and is too pricey. ADHD testing is only 400. My question is, should I tell them going in I think I have both, or should I just act like I think I only have ADHD? Will they possibly uncover autism during the testing even if I don’t say anything? I was told the testing would only take 90 minutes, so I’m not sure how in depth it actually is. What was everyone’s experience? Not sure why I’m worried saying I think I have both lol