Worked on the kestra-io/kestra repository to implement comprehensive repository testing coverage across multiple modules, focusing on ensuring reliable cross-database behavior for key components such as DashboardRepository and core repository queries. Leveraged Java, JUnit, and SQL to establish extensive unit and parameterized tests, validating search and aggregation endpoints across H2, MySQL, and Postgres databases. This approach enhanced the reliability and maintainability of the test suite, reducing the risk of regressions and improving data correctness. By prioritizing robust backend testing over bug fixes, the work laid a strong foundation for safer future refactoring and more predictable system behavior across environments.