The W3C has released a test suite for Cascading Style Sheets (CSS). CSS is a widely supported style sheet language that describes how Web documents (e.g., written in HTML or XML) are presented on screen, paper, in speech, etc. The CSS1 Test Suite will help implementors improve CSS1 support in their products and will enable Web page designers to verify the quality of CSS1 support in their browsers. Solid CSS support across a variety of browsers will encourage authors to use style sheets. The test suite consists of nearly 100 pages, each of which documents a section from the CSS specification. Using words and images, the pages describe how the various CSS features should be rendered.