firefox/testing/web-platform/meta/css/css-variables/variable-css-wide-keywords.html.ini

[variable-css-wide-keywords.html]
  [`revert-layer` as a `var()` fallback for an unregistered custom property]
    expected: FAIL

  [`revert-layer` as a `var()` fallback for a non-inheriting registered custom property]
    expected: FAIL

  [`revert-layer` as a `var()` fallback for an inheriting registered custom property]
    expected: FAIL