Automated code refactoring company Moderne and AI-powered unit test writing agent developer Diffblue announced a partnership to deliver an integrated solution for enterprise application modernization. By joining forces, the two companies aim to help large organizations will be able to upgrade and modernize applications based on extremely large codebases with greater speed with less worry. The collaboration combines Moderne’s code transformation capabilities with Diffblue’s autonomous agentic AI testing capabilities to catch potential bugs before they happen. Moderne is built on the OpenRewrite open-source project, which provides automated, safe and scalable transformation across entire codebases. It’s deterministic, which means that it’s predictable for any task, including cloud migration, framework upgrades, security fixes and language updates. That’s important because the larger the codebase, the greater the chance that any update could introduce an issue — updating from an older version of Java, for example, version 8 to a more modern version such as 17. Through the integration, Diffblue’s testing capabilities will be built directly into Moderne’s OpenRewrite recipes so they can run at large scale during application transformation. They will also be activated within Moderne’s multi-repository AI agent, Moddy, to provide test coverage for mass-scale changes.