Worked on enhancing the Hosts File Editor module in the zadjii-msft/PowerToys repository by introducing automated UI test coverage. Manual test cases were systematically converted to automated tests using C#, Selenium, and Appium, expanding the suite to cover additional functionalities and edge cases. This approach improved regression detection and increased the reliability and maintainability of the Hosts module’s testing process. To address CI/CD stability concerns, the newly added UI test projects and pipeline configurations were rolled back, restoring reliability while laying the groundwork for a controlled reintroduction of UI tests in the future. One feature and one bug fix were delivered.