Worked on the apache/gravitino repository to enhance test reliability in Windows environments by addressing file lock issues during test teardown. Focused on backend development and file system operations using Java, the solution involved implementing a Windows-specific fix that ensures the H2 backend is properly closed before database files are deleted. This approach eliminated persistent 'file in use' errors, reducing flaky test failures and improving the stability of continuous integration pipelines. The work demonstrated careful lifecycle management of backend resources and effective debugging across platforms, resulting in a more robust and maintainable test suite for the project’s ongoing development and testing.