During March 2025, Cui Bu Wei refactored test infrastructure across five major Go repositories, including CosmWasm/wasmvm, OffchainLabs/nitro, rollkit/rollkit, pulumi/pulumi, and ChainSafe/gossamer. By replacing manual temporary directory management with Go’s t.TempDir, Cui streamlined test setup and teardown, reducing boilerplate and improving test isolation. This approach enhanced CI reliability and minimized flaky tests by ensuring automatic cleanup after each run. The work demonstrated strong skills in Go development, refactoring, and testing, while standardizing testing patterns across diverse codebases. Cui’s contributions improved maintainability and onboarding for these projects, reflecting a thoughtful and systematic approach to engineering challenges.