Should also say - test in bright light, but if you're not getting consistent results near to far.... time for a body recalibration at Canon.
My 7D was awful... could AFMA for near, or middle, or far, but it would throw the other distances all off focus, by a LOT.
For instance, if I AFMA'd at say 2 meters with a 28mm lens, at 10 meters, I'd be back focusing, and at infinity I'd be front focusing!
Trip to Canon solved it, and it tracks near to far dead on now. Some lenses still need some AFMA tweakage, but thats ok. I'm finding if I tweak at about the 50x the focal length - its about right (as they suggest). And, that all of my lenses focused well at infinity (aka, the moon) while it was always the near end that needed some tweakage - which the AFMA did just fine.