Andrew Chitester modernized the Lost-Found test suite in the microsoft/git repository, focusing on improving reliability and test quality. He reworked the test logic using shell scripting to explicitly compare the actual contents of the lost-found directory with the expected files, rather than relying on file counts. This approach reduced flaky continuous integration failures and clarified expected outcomes, making the tests more deterministic and maintainable. Andrew collaborated closely with project maintainers, ensuring all changes met established standards and included thorough documentation. His work demonstrated a strong command of shell scripting and testing methodologies, delivering a targeted, well-scoped improvement to the codebase.