Test the hover media feature with machMedia. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". window.matchMedia("(hover)").matches = true window.matchMedia("(hover: hover)").matches = true window.matchMedia("(hover: on-demand)").matches = false window.matchMedia("(hover: none)").matches = false window.matchMedia("(hover: Hover)").matches = true window.matchMedia("(hover: On-demand)").matches = false window.matchMedia("(hover: None)").matches = false window.matchMedia("(Hover: hover)").matches = true window.matchMedia("(Hover: on-demand)").matches = false window.matchMedia("(Hover: none)").matches = false PASS successfullyParsed is true TEST COMPLETE