Worked on CI workflow modernization and test reliability improvements across blockchain-related Rust projects. In the paritytech/zombienet repository, migrated the continuous integration pipeline to use rustup for managing Rustfmt and Clippy, replacing the action-rs dependency to standardize toolchains and streamline build and linting processes. Also simplified parser path handling to improve robustness and reproducibility in CI. In AurevoirXavier/polkadot-sdk, stabilized the parachain extrinsic test suite by removing unreliable error log checks, focusing validation on successful finalization to reduce false negatives. Utilized Rust, YAML, and CI/CD tools, emphasizing maintainable automation and reliable testing for blockchain development workflows.