they only asked me for one.
you should visit your test centre a few days before the test to see what they have. for example, I found out they provide you with a locker that i stored my stuff in. I took my passport just in case.
Also, my testing centre was like in the attic of a large suburb mall - really wierd location - so it took me a while to find the first time. Definately relieved a lot of stress the day of my test.
Finally, if you go early, and they have an open computer (which is likely).. you will probably start your test early. I had no idea, so I went half an hour early intending to wait and clear my mind, but instead they sent me right in to a computer... I wish i had known this.
good luck man.