11 best Python Test Automation libraries in 2025

Python has become the primary tool of choice for automating tests and handling failures. The language is well suited to writing robust, clear tests, and with the right libraries Python can be a very effective test automation tool. A test suite is a collection of automated tests that verify the application under test (AUT) works as designed. Automation can improve the speed and quality of your testing. The libraries below are some of our favorite open source Python test automation tools. They're easy to pick up and use, and can help you automate your tests so you can spend more time doing what you do best — writing great code! The following is a comprehensive list of the best Java test automation open source libraries.