Your testing room does not need to be perfectly clean (we understand that people cannot sterilize a testing environment in their own home!). However, what we do look for is a complete room scan. We need to see all 4 walls and the desk where the exam will be taking place. A slow circle showing both high and low should be adequate. Try to be the only person in your testing environment, but we do understand taking the exam in a private place is not always an option. As long as it is obvious someone is not helping with your exam experience, you are all set.