nvalid import rule due to an invalid supports() declaration');
  }

  test_invalid_supports_import('@import url("nonexist.css") supports();');
  test_invalid_supports_import('@import url("nonexist.css") supports(foo: bar);');
  test_valid_supports_import('@import url("nonexist.css") supports(display:block);');
  test_valid_supports_import('@import url("nonexist.css") supports((display:flex));');
  test_valid_supports_import('@import url("nonexist.css") supports(not (display: flex));');
  test_valid_supports