at the place i took it, the bathroom was inside the computer lab itself. However, I had to leave the computer lab, signout, go back into the lab, use the restroom, come back and blah blah blah... you get the point. before i took the test the dude said, people forget to sign out all the time, but there is a sign there to remind you if you forget.... so i don't think it would have been that big of a deal, but who knows i didn't want to risk it =).