Continuous integration is a great way to keep your codebase organized and well tested. But when a test suite takes so long to run that developers stop running it before every commit, they lose their constant feedback loop and quality drops. In this talk we’ll explore methods of speeding up the test suite so that developers can be confident about the code they’ve written before they share it with the team. Every tactic will be backed up with hard benchmarks from real production code. We’ll show the evolution of a test suite from its full run time of 13m 15s down to a number you won’t believe.