Not taking all the tests I signed up for.

xclaner
Sat, 04 Jun 2016 01:33:19 +0000

I signed up for three SAT subject tests recently, but only had time to prepare for two of them. The test is tomorrow and I am wondering if I am able to just take two tests and skip the third test or will I have to take all the tests?
Does anyone have any experience with this matter?
Thank You.