Instance limit and mythics

Hi there! I was wondering if you can still do mythic + when you’ve reached your instance cap.

That’s all :>

Well, you first have to enter a regular Mythic dungeon. When you reached your cap you won’t be able to even enter that instance, right?

Yeah that sounds as how it probably works, that’s the reason I haven’t tried testing it yet, but I was wondering if somebody can give me a confirm that it works that way.