Worked on enhancing integration testing for the haystack-core-integrations repository, focusing on the MCP toolset. Developed new Python-based tests to improve reliability by addressing lazy loading, output parsing, and error handling within MCP workflows. Implemented structured output parsing to ensure downstream tools receive consistent dictionary formats, supporting more robust integrations. Broadened test coverage to validate tool lifecycle events and warm-up configurations, which helped reduce flaky test behavior. Stabilized the test suite by refining client cleanup processes, effectively clearing stale state and mitigating intermittent failures. Leveraged skills in Python, integration testing, and unit testing to deliver more stable and maintainable workflows.