[idlharness-shadowrealm.window.html]
  prefs: [javascript.options.experimental.shadow_realms:true]
  [CompressionStream interface: existence and properties of interface object]
    expected: FAIL

  [CompressionStream interface object length]
    expected: FAIL

  [CompressionStream interface object name]
    expected: FAIL

  [CompressionStream interface: existence and properties of interface prototype object]
    expected: FAIL

  [CompressionStream interface: existence and properties of interface prototype object's "constructor" property]
    expected: FAIL

  [CompressionStream interface: existence and properties of interface prototype object's @@unscopables property]
    expected: FAIL

  [DecompressionStream interface: existence and properties of interface object]
    expected: FAIL

  [DecompressionStream interface object length]
    expected: FAIL

  [DecompressionStream interface object name]
    expected: FAIL

  [DecompressionStream interface: existence and properties of interface prototype object]
    expected: FAIL

  [DecompressionStream interface: existence and properties of interface prototype object's "constructor" property]
    expected: FAIL

  [DecompressionStream interface: existence and properties of interface prototype object's @@unscopables property]
    expected: FAIL