Some developers ask whether it is worth the effort to build automated tests for serverless applications. At AWS, our answer to this question is a resounding YES!

Automated tests are important, especially if you will deploy your application to a production environment; or you expect to grow and maintain your application over time; or if you require quality, reliability, and development speed. Automated tests allow future developers to introduce changes more quickly, with greater confidence, and fewer breaking changes.

Writing automated tests is one of the most important techniques you can practice to improve your application quality and increase your development speed.