I always make sure to do headlight alignment and that all other lights are working,if there's anything underneath that needs doin i'll let them inform me,
When i was getting my 33 yr old Citroen tested yer man (black lad) was on his back in both footwells shining his torch up the back of the dash,he spent over half an hour on the car and eventually failed it on a small bit of welding on the sill at the front and put a sticker on it to say it was too dangerous to drive.....chap that did all the welding on it shrugged his shoulders and just said he was intent on failing it.