How our Rails test suite runs in 1 minute on Buildkite

At PlanetScale, our backend API is built with Ruby on Rails. It's a pretty standard Rails application. We use minitest for our test suite and FactoryBot for creating test data.Everyone on our team has worked in the past on Rails applications with slow test suites and knew how much it hurts team productivity. As our app has grown, we have continually invested time into keeping our test suite fast. We know how much a quick feedback cycle pays off for our team and a little extra work on it makes every feature we build easier.