<!DOCTYPE html>
<style>
div {
position: absolute;
top: 50px;
left: 50px;
width: 100px;
height: 100px;
}
#target {
outline: green solid 5px;
outline-offset: 10px;
}
#indicator {
outline: red solid 5px;
outline-offset: 10px;
</style>
Box should be repainted when outline-offset style changes. Passes if no red.
<div id="indicator"></div>
<div id="target"></div>