The Whizlabs provide you the practice tests exactly with the same pattern as that of the actual certification exams. The timer while taking the practice test keep you inform about the time limit (or the time left) to complete the test as in the actual certification exam. No, you can’t stop it as the code has been integrated in the website for it. Just as you can’t stop the timer in the actual exam, you can’t here at Whizlabs. And the timer is effective for you as it helps to upgrade your performance so why do you need to stop it?