Worked on stabilizing the test infrastructure for the facebook/litho repository by delivering a compatibility fix for the Litho IntelliJ Plugin tests. Addressed persistent test failures by introducing new interfaces and updating existing classes to align with an updated test structure, which improved continuous integration reliability and reduced flaky test runs. Applied Java and software development skills with a focus on unit testing, leveraging robust refactoring and interface design to reinforce maintainability. The work laid a foundation for future test-structure updates, reduced plugin-test risk, and accelerated release readiness, demonstrating a methodical approach to improving code quality and supporting ongoing development.