At my dojo it starts at 6th kyu, not a test, when you start you're at 6th.
This morning I passed my 5th kyu test, I'd never even seen a grading done before, and was nervous as anything.
But the sense of satisfaction afterwards, sensei announcing my success, outweighed the nervousness of before. Along with what Nick said, Sensei saw me screw up a couple of times, talking to him afterwards he told me he noticed when I knew I'd done so and corrected it, which I may
have been a factor.
Such a good feeling afterwards though.