firefox/testing/web-platform/meta/css/css-pseudo/parsing/the-picker-icon-pseudo-element.tentative.html.ini

[the-picker-icon-pseudo-element.tentative.html]
  ["::picker-icon" should be a valid selector]
    expected: FAIL

  ["*::picker-icon" should be a valid selector]
    expected: FAIL

  ["foo.bar[baz\]::picker-icon" should be a valid selector]
    expected: FAIL

  ["::slotted(*)::picker-icon" should be a valid selector]
    expected: FAIL

  ["::part(foo)::picker-icon" should be a valid selector]
    expected: FAIL