Worked on the robolectric/robolectric repository to deliver a UI Contrast Level Setting feature, enabling automated testing of UI accessibility across Android API levels. Developed a set and get API for UI contrast within the Robolectric testing framework using Java, with comprehensive unit tests covering valid ranges, invalid inputs, and persistence across different Android versions. This addition improved the reliability and consistency of UI rendering tests, reducing manual QA effort and minimizing flaky test failures related to accessibility. The work demonstrated a strong focus on Android development and unit testing, ensuring robust validation of edge cases in accessibility-related test scenarios.