posted on 02.01.2024 There isn't much more to say; it's all in the title. Many automated testing tools are a collection of JavaScript functions you run on a page. Most of those rely on querying the DOM. If a tool doesn't consider shadow trees, it only catches accessibility errors in the Light DOM, which may give you a wrong sense of safety and potentially affect your users. That's one more reason not to rely on automated testing only. That doesn't mean you shouldn't use automated testing if your...