[at-scope-relative-syntax.html]
  [> .foo in .nest,@scope created by string valid]
    expected:
      if (os == "mac") and not debug: [PASS, FAIL]

  [> .foo in .nest,@scope,@media screen created by string valid]
    expected:
      if (os == "mac") and not debug: [PASS, FAIL]

  [> .foo in .nest,@scope created by insertRule valid]
    expected:
      if (os == "mac") and not debug: [PASS, FAIL]

  [> .foo in .nest,@scope,@media screen created by insertRule valid]
    expected:
      if (os == "mac") and not debug: [PASS, FAIL]