<!DOCTYPE html> <html reftest-async-scroll reftest-displayport-x="0" reftest-displayport-y="0" reftest-displayport-w="800" reftest-displayport-h="2000" reftest-async-scroll-x="0" reftest-async-scroll-y="50"> <style> body { margin: 0; overflow: hidden; } div { height: 1400px; background: url(repeatable-diagonal-gradient.png) top left / 512px 512px fixed no-repeat } </style> <div></div> </html>