Our blue belt test is not really a test. By that, I mean that our instructor already knows if you have the skills necessary to be a blue belt. You wouldn't be invited otherwise.
Your individual skills for positions, techniques and sparring will have already been tested through 2 of the 4 possible stripes at white belt.
So, the blue belt test for us is really an initiation into the Vaghi belt system.
It starts with approximately 2 hours of BJJ specific drills. It's like a really long, arduous warm up. Every possible BJJ movement you can imagine is used. Once you are completely exhausted, the upper belts arrive. Only those that have take the test themselves are allowed to come to this part (other than the testing folk). For the next hour, we roll. There are typically 4 to 6 fresh guys per tester and the rolling is constant for the entire hour.
At first, it is utterly demoralizing. You are so used to relying on strength, speed, etc. Then, after about 20 minutes, you find your second wind and you start to focus very specifically on technique, because that is all you have left. You don't exactly win, but you have little victories, brought on entirely by properly using technique.
I was taken to a place that I rarely find myself, completely spent. I got to spend 40 minutes there, being challenged to defend myself, and I learned so much during that time. When I'm in a competition and I'm tired, I can think back to that day and realize that I'm not really that tired...and I can stop whining and act.