Also, JLPT day itself utterly sucks. If you haven't taken the test before, be ready for a day that will drag on, be full of bureaucratic bullshit, and make you willing to trade 10 points off your score if only you could get it over with faster.
Another note: it is likely that within days of the test finishing, it will show up on some chinese website along with the answers. If you don't feel like waiting until next summer to hear your score, keep your eyes open for that. I was able to check my score two days after the test and it really gave me some peace of mind.