For all my other tests, I was dead relaxed, got up early, had a nice breakfast and a relaxing hour's drive before the test. And failed them all.
For the test I passed, I woke up late, couldn't find my driving license and had to spend an hour tearing the house apart looking for it while having a screaming argument with my mum. Finally found it, clipped a kerb and the wing-mirror of a parked car on the way, and arrived with seconds to spare for my test. Passed without a single minor. I guess I operate better under stress.