6 May 2016 Last updated at 17:10 BST
With Sats tests taking place in schools in England this week some of you might be feeling those pre-test nerves.
So, we asked some top CBBC stars to tell us how they felt before taking a test at school, and what they did to help beat the nerves and feel exam-ready.
Whether it's asking for extra study help, or just remembering to breathe, these guys have got some great advice...
Preparing for exams and tests at school can sometimes leave you feeling a bit nervous or stressed.