[variable-substitution-basic.html]
  [Simple substitution test]
    expected: FAIL

  [You can't build up a single token where part of it is provided by a variable]
    expected: FAIL

  [Multiple variable references in a single property]
    expected: FAIL

  [Multiple variable references in a single property (no spaces)]
    expected: FAIL

  [Fallback value]
    expected: FAIL

  [Fallback value which is also a variable reference]
    expected: FAIL

  [Multiple var references in fallback value]
    expected: FAIL

  [Multiple nested fallbacks]
    expected: FAIL