Worked on the ceph/s3-tests repository to enhance the reliability and maintainability of S3 object storage testing. Focused on improving test coverage for percent-encoded object keys in S3 copy operations, adding targeted tests to validate correct handling of edge cases involving special characters. Used Python and Boto3 to implement and refine these tests, ensuring robust validation of encoding behaviors and preventing regressions. Additionally, contributed to test suite maintenance by removing an unnecessary Pytest marker, streamlining test execution and reducing the risk of misconfiguration. The work emphasized quality assurance and continuous integration reliability, supporting a more stable testing environment.