Worked on the nodejs/undici repository to enhance the reliability of client tests by addressing disconnect scenarios. Focused on improving test resilience, the developer implemented guards within JavaScript-based client-server architecture tests to handle and validate unexpected disconnect events. This approach ensured that tests would fail gracefully when disconnects occurred, reducing flakiness and providing more accurate feedback in continuous integration environments. By validating client behavior under these conditions, the work increased confidence in the system’s production resilience. The solution leveraged JavaScript and testing best practices to strengthen the robustness of the test suite without introducing new features during the development period.