Nothing to worry about m8.
Lights (adjustment on headlight same as car, with the meter thng) brakes, but not on a roller. He will jiggle your forks to make sure there is no play, check wheel bearings I assume. He will have a look at your chain and sprocket.
I told a mate that he was looking at something around the rear but I didn't know what..... "He was looking at your chicken line" humph
The guy was dead on, and a biker himself. We had a decent chat while he was dong it, which has never happened on a car test.
Incidentally another m8 failed for his back tyre and back brake. He kinda knew he would, just didn't have time to replace after the NW200 weekend. Claims they were ok before that.... I don't know. The point being that, same as cars, they only look at those parts on the retest.
Dead easy to get a date online quick, so just bung it in and see how it goes.