Developed comprehensive initialization tests for automatic gas fee configuration within the TransactionController of the MetaMask/metamask-extension repository. Focused on enhancing test coverage and ensuring correctness, the work introduced parameterized tests to verify that gas fee updates are appropriately gated by transaction type, disabling updates for swap, swapApproval, bridge, and bridgeApproval transactions while enabling them for contractInteraction. Emphasized traceability to support future changes in gas-fee logic. Leveraged TypeScript and JavaScript for backend development and testing, prioritizing maintainability and accuracy in transaction processing. The contribution addressed a critical area of transaction logic, supporting robust and reliable gas fee configuration in production.