# 18,957 tests in under 6 minutes: ClassDojo's approach to backend testing We're pretty proud of our backend test suite. We have a lot of tests, and developers can run the full test suite locally in under six minutes. These aren't simple unit tests—they're tests that hit multiple databases and routes with only a minimal amount of stubbing for external dependencies. 9 years ago, [we were proud of running 2,000 tests in 3 minutes](https://engineering.classdojo.com/blog/2015/01/20/continuous-t...
