During February 2025, Xiaochong Wei focused on improving test stability for the IBM/velox repository by addressing platform-dependent failures in the ReaderTest.projectColumnsMutation unit test. He analyzed differences in random number generator implementations, specifically between __gnu_cxx::sfmt19937 and std::mt19937, and adapted test assertions to account for these variations based on platform and architecture. By conditioning expectations on FOLLY_HAVE_EXTRANDOM_SFMT19937 and macOS environments, he reduced flaky failures across continuous integration pipelines. Xiaochong applied his expertise in C++ development and testing to ensure consistent test outcomes, enhancing CI reliability and enabling safer, faster code changes for cross-platform development teams.