Worked on the ethereum/go-ethereum repository to enhance the reliability of Ethereum’s Go-based state test framework. Focused on improving test determinism, the developer addressed a bug by updating the test harness to verify post-state root hashes even when errors are expected, recalculating the root from pre-transaction snapshots and comparing it to the expected value. This approach ensured accurate state clearing in accordance with EIP-158 rules and maintained fork awareness using Go and blockchain development skills. The result was a more robust testing process that reduced flaky failures and strengthened confidence in EVM state transitions, with an emphasis on thorough testing practices.