anchor.diff:  
     LC_ALL = "en_US.UTF-8";
   
  -  # Disable doctest plugin—enabled in the shipped pytest.ini—because it causes pytest to hang
  -  # Ignore proxy tests because requires mitmproxy
  -  # Ignore utils_display tests because it requires pygments
  -  # Ignore test_retry_dns_error because tries to resolve an invalid dns and weirdly fails with "Reactor was unclean"
  -  # Ignore xml encoding test on darwin because lxml can't find encodings https://bugs.launchpad.net/lxml/+bug/707396
  -  checkPhase = ''
  +  # Disable doctest plugin because it causes pytest to hang
  +  preCheck = ''
       substituteInPlace pytest.ini --replace "--doctest-modules" ""
  -    pytest --ignore=tests/test_linkextractors_deprecated.py --ignore=tests/test_proxy_connect.py --ignore=tests/test_utils_display.py --deselect tests/test_crawl.py::CrawlTestCase::test_retry_dns_error ${lib.optionalString stdenv.isDarwin "--deselect tests/test_utils_iterators.py::LxmlXmliterTestCase::test_xmliter_encoding"}
     '';
  +
  +  pytestFlagsArray = [
  +    "--ignore=tests/test_proxy_connect.py"
  +    "--ignore=tests/test_utils_display.py"
  +    "--ignore=tests/test_command_check.py"
  +  ];
  +
  +  disabledTests = [
  +    "FTPFeedStorageTest"
  +    "test_noconnect"
  +    "test_retry_dns_error"
  +    "test_custom_asyncio_loop_enabled_true"
  +    "test_custom_loop_asyncio"
  +  ] ++ stdenv.lib.optionals stdenv.isDarwin [ "test_xmliter_encoding" ];
   
     src = fetchPypi {
       inherit pname version;
  -    sha256 = "b4d08cdacb615563c291d053ef1ba2dc08d9d4b6d81578684eaa1cf7b832f90c";
  +    sha256 = "4ea7fbc902ee0b0a79b154d07a5f4e747e2146f272a748557941946000728479";
     };
   
     postInstall = ''
  
positive.code: , isPy27
  , fetchPypi
  , glibcLocales
  , pytest
  , testfixtures
  , pillow
  , twisted
  
negative.code:   checkInputs = [
      glibcLocales
      jmespath
      pytestCheckHook
      sybil
      testfixtures
      pillow
  