Solly contributed to the microsoft/git repository by modernizing the test infrastructure for path validation. Focusing on a targeted bug fix, Solly replaced legacy shell-based checks with the C-based test_path_is_file and test_path_is_dir helpers, enhancing the reliability and diagnostics of file and directory validations. This update reduced flaky tests and improved the speed of failure triage, directly supporting repository stability. The work involved C programming, shell scripting, and continuous integration practices, reflecting a methodical approach to improving test utilities. Although the contribution was limited to a single bug fix over one month, it addressed a core aspect of test reliability.