[headers-basic.html]
  type: testharness
  [Create headers from no parameter]
    expected: FAIL

  [Create headers from undefined parameter]
    expected: FAIL

  [Create headers from empty object]
    expected: FAIL

  [Create headers with sequence]
    expected: FAIL

  [Create headers with OpenEndedDictionary]
    expected: FAIL

  [Create headers whith existing headers]
    expected: FAIL

  [Check append method]
    expected: FAIL

  [Check set method]
    expected: FAIL

  [Check has method]
    expected: FAIL

  [Check delete method]
    expected: FAIL

  [Check get method]
    expected: FAIL

  [Check keys method]
    expected: FAIL

  [Check values method]
    expected: FAIL

  [Check entries method]
    expected: FAIL

  [Check Symbol.iterator method]
    expected: FAIL

  [Check forEach method]
    expected: FAIL