Worked on stabilizing the LoongArch test suite for both the zephyrproject-rtos/gcc and rust-lang/gcc repositories by addressing issues that caused test hangs during make check. Focused on improving the reliability of compiler testing by implementing a state-preserving mechanism for the dg-do-what-default setting, ensuring the test environment remained consistent across different configurations. Utilized Tcl for scripting and leveraged expertise in build systems and embedded systems to refine the test harness. These changes reduced flaky CI outcomes and accelerated feedback for LoongArch targets, demonstrating a methodical approach to debugging and cross-repository collaboration in complex testing environments.