Worked on the open-telemetry/otel-arrow repository to address flaky timer-related tests in the Pipeline Control subsystem by implementing deterministic timer testing. Replaced wall-clock assertions with a simulated clock, ensuring timers fired precisely at their scheduled times and not before deadlines, which improved test reliability and reduced CI flakiness. The approach preserved coverage for multiple timers and their ordering, integrating seamlessly with the existing simulated-clock infrastructure. Utilized Rust for both asynchronous programming and comprehensive testing, validating changes through cargo test and cargo check. This work enhanced CI/CD stability and maintained robust test coverage for timer scenarios without introducing new features.