Worked on the flutter/flutter repository to refactor the Sliver App Bar test suite, focusing on improving test reliability and maintainability. The approach involved inlining the verifySliverGeometry logic directly into sliver_app_bar_test, which eliminated dependencies on shared test utilities and reduced cross-imports such as sliver_test_utils.dart. This change clarified test intent, minimized coupling, and streamlined the test scaffolding process. Validation was performed using local Flutter analyze and test runs to ensure quality and stability. The work leveraged Dart and Flutter, with an emphasis on robust testing practices, ultimately delivering a more maintainable and efficient test suite for ongoing development.