The sparring portion of the test is there for two reasons: 1) to make sure no one gets a black-belt from me that hasn’t for damn sure gotten a fair amount of hard, on the mat training time in and 2) to force you to connect with your fellow candidates during the test. It’s the only portion of the test that directly requires you to work with others on a consistent basis and is a good reminder that martial arts learning is best done with partners.