Django Test Splitting on Circle CI

One of the most important things you can do for your development teams' productivity is to shorten the feedback loop during development. This applies to getting feedback from customers or stakeholders to ensure you're building the right thing, as much as it does to testing the code you're writing to ensure no bugs have crept into your change set.

Today we're focusing on the Development - Test feedback loop. Developing a change and running your regression test suite to validate that change should be as fast as possible.

We've used three different systems to run our unit tests over the last few years. Beginning with a self-hosted Jenkins instance, transitioning to Travis CI, and finally arriving at Circle CI.