During February 2025, Ninxu contributed to the zadjii-msft/PowerToys repository by enhancing the Hosts File Editor module’s testing quality. Ninxu converted manual test cases into automated UI tests using C#, Selenium, and Appium, expanding coverage to include new scenarios and edge cases. This automation improved regression detection and maintainability of the test suite. To address CI/CD stability issues, Ninxu subsequently rolled back the new UI test scaffolding and pipeline configurations, restoring reliability to the build process. The work demonstrated a thoughtful approach to balancing test coverage with CI stability, laying groundwork for future controlled reintroduction of automated UI tests.