Worked on the broadinstitute/sam repository to upgrade the continuous integration test environment from PostgreSQL 9.6 to PostgreSQL 15, ensuring that automated tests reflect current production database capabilities. This change was implemented using YAML for CI configuration and focused on database management best practices to improve test reliability and compatibility. By aligning the CI environment with a modern, supported database version, the work reduced the risk of flaky tests and unexpected failures, supporting safer and faster release cycles. The approach emphasized clear documentation, reproducibility, and minimal disruption to existing workflows, demonstrating careful attention to CI/CD processes and traceable change management.