chromium/third_party/blink/web_tests/css3/selectors3/xml/css3-modsel-14b.css

p { background: green; color: white; }
.t1.fail { background: red; color: yellow; }
.fail.t1 { background: red; color: yellow; }
.t2.fail { background: red; color: yellow; }
.fail.t2 { background: red; color: yellow; }
/* Note: This is a valid test even per CSS1, since in CSS1 those rules
         are invalid and should be dropped. */