Worked on enhancing the Document Interfaces URL test suite in the canonical/snapd repository, focusing on improving test reliability and performance. Addressed intermittent flakiness by implementing a five-second retry delay for HTTP 429 responses when the Retry-After header was missing, and optimized resource usage by switching URL accessibility checks from GET to HEAD requests. Updated YAML-based test configurations to remove outdated exceptions, ensuring alignment with current Discourse platform behavior and reducing false positives. Leveraged skills in CI/CD, Shell scripting, and YAML to deliver a more stable and efficient testing process, consolidating these improvements across multiple targeted code commits.