Worked on the equinor/ecalc repository to enhance testing infrastructure and streamline developer onboarding. Focused on improving Dockerized snapshot tests by introducing a pytest filter that treats deprecations as errors while selectively ignoring internal warnings, thereby increasing test reliability. Expanded the test service to run the full pytest suite within Docker, not just snapshot tests, and added a dedicated dockersnapshots service to docker-compose for comprehensive end-to-end testing. Updated documentation written in Markdown to clarify local and CI testing workflows, including environment requirements and platform-specific considerations. Utilized skills in CI/CD configuration, Docker, and YAML to deliver these targeted improvements.