Worked on enhancing the reliability of flash command tests within the nxp-upstream/zephyr repository, focusing on the flash shell verification flow. Addressed a bug in the flash shell test command by correcting return value handling and improving error propagation, which reduced false negatives during test verification. The approach emphasized code quality and stability, with a targeted patch that clarified error comparison logic and ensured proper error handling in the flash subsystem. Utilized C programming skills and embedded systems knowledge to deliver a robust solution, contributing to firmware development practices that prioritize regression prevention and maintainable testing behavior over new feature delivery.