During December 2025, Guido stabilized the testing infrastructure for the symfony/ai-store repository by addressing a reliability issue in the PHPUnit configuration. He replaced external schema references in XML configuration files with local PHPUnit installation paths, thereby eliminating dependency on external URLs and reducing CI flakiness. This technical approach improved the reproducibility and reliability of automated test runs, ensuring faster and more consistent feedback during development. Guido’s work involved careful updates to XML configuration and documentation, leveraging his skills in PHPUnit and testing. The depth of this contribution lies in its focus on foundational infrastructure, directly supporting robust and maintainable workflows.