Worked on improving test reliability for the ceph/s3-tests repository by addressing known issues in the s3tests_boto3/functional/test_s3.py suite. Applied targeted debugging and Python skills to mark specific tests with pytest.mark.fails_on_dbstore, ensuring they are skipped in dbstore environments where failures are expected. This approach confined changes strictly to the test suite, avoiding any impact on production code while enhancing the stability and speed of continuous integration feedback. Demonstrated disciplined test engineering and a strong understanding of the pytest framework, contributing to more predictable CI runs and supporting faster release readiness through improved automated testing workflows.