During their work on the containers/podman-py repository, Fulmine Mizzega developed and tested default image build parameters to improve podman-remote compatibility and build determinism. They introduced integration and unit tests in Python to validate caching behavior and ensure reliable parameter defaults, addressing issues with mock URLs and test isolation. By focusing on backend development and API testing, Fulmine reduced CI flakiness and accelerated feedback loops, particularly by removing dependencies on external images and cleaning up deprecated code. Their contributions enhanced test coverage, reliability, and maintainability, resulting in a more deterministic and efficient continuous integration process for the project.