Visual Testing Using PhantomCss The document discusses using PhantomCss for visual testing of a marketing website that needed to support right-to-left languages like Arabic. Implementing right-to-left support easily breaks existing CSS, so a testing strategy was needed. PhantomCss was chosen because it allows taking screenshots and comparing them to detect visual regressions caused by CSS changes. It demonstrates using PhantomCss to test layout, selectors, and user interactions across browsers and platforms. Best practices and advanced features like parallelization and deterministic runs are also covered.