For the majority of testing, you do not need to. We are automatically excluded from Google Analytics (we don’t load the GA code). For other Analytics software you can exclude us based on our user agent (we contain the ‘StatusCake’ key word in all our crawls)
One exception would be our Page Speed tests, you’d need to enable the option to not load trackers. This can be done in the editor of your Page Speed test. The option is called “Block Trackers”. It is enabled by default for new tests.