The following css-masking tests fail after importing tests on 2021-08-21: imported/w3c/web-platform-tests/css/css-masking/clip-path/clip-path-svg-text-backdrop-filter.html imported/w3c/web-platform-tests/css/css-masking/clip/clip-filter-order.html imported/w3c/web-platform-tests/css/css-masking/mask-image/mask-image-clip-exclude.html imported/w3c/web-platform-tests/css/css-masking/mask-image/mask-image-url-image-hash.html imported/w3c/web-platform-tests/css/css-masking/mask-image/mask-image-url-image.html imported/w3c/web-platform-tests/css/css-masking/mask-image/mask-image-url-local-mask.html imported/w3c/web-platform-tests/css/css-masking/mask-image/mask-image-url-remote-mask.html
<rdar://problem/82480060>
The patch in bug 229082 fixes most of these issues except the last two (mask-image-url-local/remote-mask.html), since those reference an SVG <mask> element from an HTML element, which we don't support yet.