pytest-testmon is a pytest plugin which selects and executes only tests you need to run. It does this by collecting dependencies between tests and all executed code (internally using Coverage.py) and comparing the dependencies against changes. testmon updates its database on each test execution, so it works independently of version control.

In this episode, I talk with testmon creator Tibor Arpas about testmon, about it's use and how it works.

Special Guest: Tibor Arpas.

Links:

• testmon.org
• Determining affected tests
• Tibor's post on using pytest in PyCharm
• runtime-info plugin for PyCharm