You don't do that if you are testing out enabling a feature, and the framerates before you start aren't even playable. At that point, you are just running into limitations that no one in real life will ever hit. Or will they? I have no idea, because these tests can't tell me if i'll run into the same problem when i'm running games at a more reasonable framerate or not.
When non-AA is giving you 7fps, anything with 2-3 is within the margin of error, so you can't even tell if anything is happening or not.