Worked on stabilizing the MIPS test configuration for r6 targets in the rust-lang/gcc repository, focusing on improving continuous integration reliability and reducing false test failures. Addressed a persistent issue by updating the test suite to use a fixed isa_rev=2 value instead of a range-based check, which preserved core compiler behavior while enhancing test determinism. The solution was implemented in C and documented thoroughly to support future maintenance and traceability. Leveraged skills in compiler development, embedded systems, and testing to deliver a targeted bug fix, demonstrating disciplined change management and a commitment to robust, maintainable code in collaborative environments.