gecko-dev/layout/reftests/css-gradients/radial-zero-length-1g.html

<div style="background: -moz-radial-gradient(left, circle closest-side, white, black); width: 300px; height: 300px;"></div>
<div style="background: -moz-repeating-radial-gradient(left, circle closest-side, white, black); width: 300px; height: 300px;"></div>