So such tests usually are a fun but repetition of the reviews. Not all games have free demos but look around Steam for Free to Play games.
-> I have to ask, why the tests? The GPU you have is known to perform well at 1080p.
I just got a GTX 1060 and I would like to test it's possibilities in gamss, but when I mean games I do not mean games like GTA or Doom, I mean "demo test" game that lets you test graphics.