Worked on the robolectric/robolectric repository to enhance the reliability of Android unit tests by addressing two core issues in Java. Focused on improving Robolectric’s fidelity, the developer fixed system app version handling in Package Manager Shadows, ensuring accurate distinction between original system image packages and updated data partition versions. Additionally, they aligned ShadowActivity’s startActivityIfNeeded behavior with AOSP standards, introducing precondition checks and activity reuse to better simulate Android launch semantics. Comprehensive unit tests were added for both fixes, reducing flaky tests and increasing confidence in test outcomes. The work demonstrated strong Android development and unit testing skills.