| PASS - "-webkit-mask-position" property for "box" element at 0.5s saw something close to: 40px 40px, 40px 40px | |
| PASS - "-webkit-mask-position" property for "box2" element at 0.5s saw something close to: 40px 40px | |
| PASS - "-webkit-mask-position" property for "box3" element at 0.5s saw something close to: 40px 40px, 40px 80px | |