I just attended the first black belt test that my school has had since I joined. Our black belts test from 6 pm on Friday until 4 pm on Saturday with a few breaks for meals and sleeping. They have sporadic endurance trials, forms through nihachi and bassai, self-defense, random display of advanced techniques, a demonstration of teaching ability, a written historical and korean language test, and they have to perform a double action break (two boards in mid air with different techniques at once) and break at least three bricks with a hand strike.