diff -u b/core/.stylelintrc.json b/core/.stylelintrc.json
--- b/core/.stylelintrc.json
+++ b/core/.stylelintrc.json
@@ -31,7 +31,6 @@
     "property-no-unknown": null,
     "rule-empty-line-before": null,
     "selector-pseudo-element-colon-notation": null,
-    "selector-type-no-unknown": true,
     "shorthand-property-no-redundant-values": null,
     "unit-whitelist": ["deg", "em", "ex", "ms", "rem", "%", "s", "px"]
   },