Worked on expanding test coverage and improving test stability in the rust-lang/rust-analyzer repository, focusing on cross-platform reliability. Delivered FreeBSD support for the TestDir utility, enabling the test suite to run seamlessly on this additional operating system. Addressed an unused variable warning that appeared during FreeBSD test runs, which reduced unnecessary CI failure noise and contributed to smoother continuous integration workflows. Utilized Rust for implementation and applied CI/CD and testing best practices to ensure robust, maintainable code. The work enhanced the reliability of automated testing across platforms, supporting the ongoing quality and portability of the rust-analyzer project’s codebase.