Yes, you can usually use the restroom during the Praxis. However, this may vary depending on rules and regulations implemented by the testing center. Before test day, it is important that you read and understand the instructions about breaks�if any are given. Even though it might be tempting to think about pay someone to take my Praxis for me online, remember to approach this examination with honesty and integrity. Instead of trying shortcuts like these focus on working hard in your preparations so as to achieve what you want from it and progress further in teaching profession.