Sustainability analyst Bonnie Schneider is on location at the Code Remix Summit in Florida, where she speaks with Andy Piper, Vice President of Engineering at Diffblue, an Oxford, UK–based company specializing in AI-powered Java unit test generation. Andy explains how Diffblue uses reinforcement learning to create accurate, idiomatic tests that save developers time and improve software reliability. He also highlights Diffblue’s new partnership with Moderne, which combines automated code upgrades with trusted testing to accelerate modernization and reduce environmental impact.