During November 2024, Dan Skinner enhanced the test infrastructure for the bugsnag/bugsnag-js repository, focusing on browser testing and CI/CD reliability. He implemented HTTPS-enabled end-to-end testing, streamlined URL construction, and improved test artifact cleanup to ensure broader and more reliable test coverage. In bugsnag/bugsnag-js-performance, Dan enabled end-to-end tests to run over HTTPS, updated test assertions, and addressed flaky delivery-fetch tests by restoring expected fixtures. His work involved JavaScript, TypeScript, and Ruby, emphasizing configuration management and automated testing. These changes improved repository hygiene, stabilized the CI pipeline, and allowed for more production-like test scenarios, reflecting a deep, systematic engineering approach.