During December 2024, H.D.S. refactored tracing instrumentation tests for the vectordotdev/tokio repository, focusing on improving test reliability and maintainability. By consolidating these tests into the main integration test suite and aligning them with the evolving tracing-mock API, H.D.S. reduced setup overhead and simplified future updates. The work eliminated the need for a separate test crate, instead leveraging the published tracing-mock dependency directly within the Rust-based test suite. This approach streamlined CI/CD workflows and accelerated feedback cycles. The project demonstrated depth in Rust, CI/CD, and testing practices, addressing compatibility and flakiness issues while enhancing the overall test infrastructure.