During March 2026, Jiang Haiting focused on stabilizing the test suite for the apache/bookkeeper repository by addressing environmental dependencies in BookieSocketAddressTest. He refactored the tests to use Mockito-based mocking in Java, replacing direct DNS calls with a mockHostnameIPSetup helper that simulated DNS.getDefaultIP behavior. This approach eliminated reliance on local network configurations, ensuring that all four existing tests passed consistently across different environments. By improving the determinism and reproducibility of unit tests, Jiang enhanced CI stability and enabled safer, faster releases. His work demonstrated depth in mocking and unit testing, contributing to more robust and maintainable test infrastructure.