Worked on stabilizing the test infrastructure for the nushell/nushell repository, focusing on improving reliability across various Cargo configurations. Addressed a specific issue in test-support artifact discovery by ensuring that the system uses the CARGO_BUILD_TARGET_DIR environment variable when CARGO_TARGET_DIR is not set, which reduced CI flakiness and led to more consistent test results. The solution was a minimal, targeted change that did not affect production code and was validated using the existing test suite. Demonstrated skills in Rust, CI/CD, and testing, with an emphasis on cross-environment robustness and careful handling of Cargo environment variables for test reliability.