Developed comprehensive integration test coverage for the GitLab User API within the tramlinehq/tramline repository, focusing on the user information endpoint. The work involved implementing a spec in Ruby on Rails that mocks external HTTP GET requests to the GitLab API and validates the transformation of returned user data. By expanding the test suite with these API integration tests, the developer improved the reliability of the GitLab integration and reduced risks associated with external API changes. Leveraging skills in API integration testing, Ruby, and Git-based version control, the contribution ensured faster feedback cycles and enhanced CI readiness for ongoing development.