During November 2024, Sudhan Dahake enhanced the CalamityCall repository by developing comprehensive unit tests for the ReactionsModel and UserModel components. Focusing on backend development with Python, Sudhan applied mocking and automated validation to cover both standard CRUD operations and edge cases, ensuring that input validity and error handling were thoroughly exercised. This approach directly addressed regression risks by catching issues early in the development cycle, supporting safer and more reliable deployments. While the work was limited to a single feature and did not involve bug fixes, the depth of test coverage contributed to improved release confidence and codebase stability.