Regression testing after code changes can be automated easily. Once you’ve created test cases with Pytest or Great Expectations, you can set up a CI/CD pipeline using tools like Jenkins or GitHub Actions. For a non-prod setup, Docker is great for replicating the environment consistently.

If you're looking for more details, this blog might help: Regression Testing and Stat Studio. It explains tools and processes for smoother regression testing.

Hope this helps! Let me know if you have any specific questions.