[private-cssom-serialization.tentative.html]
  [Empty @private rule]
    expected: FAIL

  [Untyped variable without a default]
    expected: FAIL

  [Untyped variable with a default]
    expected: FAIL

  [Multiple variables]
    expected: FAIL

  [Repeated variable name]
    expected: FAIL

  [Trailing whitespace is omitted]
    expected: FAIL

  [Typed variable without a default]
    expected: FAIL

  [Typed variable with a default]
    expected: FAIL

  [Multi-component type]
    expected: FAIL

  [Single-component type() is unwrapped]
    expected: FAIL

  [Universal type is omitted]
    expected: FAIL

  [Custom-ident type() is unwrapped]
    expected: FAIL

  [Structured default value]
    expected: FAIL

  [Escaped variable name]
    expected: FAIL

  [Escaped custom-ident type]
    expected: FAIL

  [An all-invalid block serializes as an empty rule]
    expected: FAIL

  [Invalid declarations are omitted]
    expected: FAIL

  [!important declaration is omitted]
    expected: FAIL