Not necessarily. It got a really good score on the CLEP Business Law practice test - and ended up flunking the test by 4 points. The thing was - I hadn't learned the concepts -- even though I did well on the practice test. Do you understand the concepts? If yes- then the practice test might be an indication that you'll do well on the test.

I suggest taking a Peterson's practice test or two. If you do well on those
(50% +) --then you'll probably pass the actual test. Have fun!