During April 2025, Francesco Ferrario developed the in-process MCP testing framework, mcptest, for the grafana/mcp-go repository. This work enabled MCP clients and servers to interact within a single process, streamlining test feedback and reducing integration complexity. He implemented the NewIO helper to create Stdio transports from existing I/O streams, allowing for more flexible and robust test harnesses. Using Go and system programming techniques, Francesco also delivered a comprehensive mcptest test suite, which increased coverage and reliability for MCP components. The depth of this work established a foundation for faster, more stable MCP testing and improved continuous integration workflows.