https://video.ut0pia.org/videos/watch/ca6e9480-5511-4e5c-96b4-dad50e44a83f When an LLM writes your tests, it tends to write tests that confirm what the code does rather than tests that verify what the user experiences. Your test suite goes green. The app still breaks in ways none of those tests would catch. Marlene Mhangami from Microsoft makes the case for flipping the order: get the agent to write failing Playwright tests against the expected behavior first, then generate code to pass them. The demo runs this live with GitHub Copilot and the Playwright MCP server on a toy store search feature, with the browser open so you can watch the agent click through filters and validate results in real time. Speaker info: https://x.com/marlene_zw, https://www.linkedin.com/in/marlenemhangami/, https://github.com/marlenemhangami Sun, 17 May 2026 12:27:48 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://video.ut0pia.org https://video.ut0pia.org/lazy-static/avatars/0287a09a-aae7-4840-9843-b416426e7046.webp https://video.ut0pia.org/videos/watch/ca6e9480-5511-4e5c-96b4-dad50e44a83f All rights reserved, unless otherwise specified in the terms specified at https://video.ut0pia.org/about and potential licenses granted by each content's rightholder.