Found this (apparently legitimate) test randomly online:
http://www.humanmetrics.com/cgi-win/JTypes2.asp In my case, I feel like it was really accurate, so I figured I'd share. Takes a little time to do, but if you have about 20 minutes to kill or want to procrastinate, go for it.
My results:
http://typelogic.com/infj.html Enjoy!