LayoutTests/svg/custom/visibility-override.svg

<svg xmlns="http://www.w3.org/2000/svg">
  <rect fill="red" height="100px" width="100px"/>
  <g visibility='hidden'>
    <rect fill="green" height="100px" width="100px" visibility='visible'/>
    <rect fill="red" height="100px" width="100px"/>
  </g>
</svg>