They didn't check mine for a spare tyre, but I may have been lucky.
You can Borrow my spare tyre if ya want to be safe.
I failed the pits because my tint was slightly to dark, air filter was a bit wobly, and indicatrors were tinted black.
You should be right with the exaust unless they flog it when they take it for a test drive. My exaust passed, and you can ask around, my exaust is pretty damn loud.