Worked on modernizing the registry tests for the apache/dubbo repository, focusing on improving test reliability and maintainability. Refactored the test suite to remove dependencies on the dubbo-test-common library and introduced mock objects for Zookeeper clients and registries, enabling more isolated and robust testing. Leveraged Java and mocking frameworks within a test-driven development workflow to update assertions and validate the behavior of the multiple registry implementation. This approach reduced test flakiness, improved feedback speed, and enhanced code quality by decoupling tests from shared libraries, ultimately supporting safer releases and clearer test expectations for the Dubbo registry module.