Worked on the geerlingguy/linux repository to improve the reliability of Linux kernel network driver selftests. Focused on addressing a timing issue where test results could be affected by late-arriving packets, the developer implemented a solution that waits for the iperf client to fully stop sending traffic before proceeding with validation. This change, developed using Python scripting and deep knowledge of Linux kernel selftesting and network testing, ensures that selftests now accurately reflect the network state after traffic generation. The fix reduces flaky test outcomes, stabilizes continuous integration pipelines, and accelerates debugging and release readiness for the geerlingguy/linux codebase.