Worked on expanding test coverage for the arm64 platform within the sonic-net/sonic-mgmt repository by enabling watchdog tests tailored to the arm64-c8220tg_48a_o-r0 hardware. Focused on configuration management and platform development, the work involved adding watchdog timeout entries using YAML to facilitate platform-specific test support. Testing skills were applied to validate these enhancements through continuous integration and targeted test runs, ensuring that watchdog behavior could be verified earlier in the development cycle. This effort improved the testability and readiness of the arm64 platform, allowing for more robust validation of hardware-specific features within the existing CI pipeline.