anchor.diff:      pytestCheckHook
     ];
   
  -  disabledTests = lib.optionals stdenv.isDarwin [ "test_run_local_server" ];
  +  disabledTests = lib.optionals stdenv.isDarwin [
  +    "test_run_local_server"
  +  ];
  +
  +  pythonImportsCheck = [
  +    "google_auth_oauthlib"
  +  ];
   
     meta = with lib; {
       description = "Google Authentication Library: oauthlib integration";
  
positive.code: 
    propagatedBuildInputs = [
      google-auth
      requests_oauthlib
    ];
  
    checkInputs = [
  
negative.code: , mock
  , pytestCheckHook
  , google-auth
  , requests-oauthlib
  , pythonOlder
  }:
  
  buildPythonPackage rec {
    pname = "google-auth-oauthlib";
    version = "0.5.0";
    format = "setuptools";
  
    disabled = pythonOlder "3.6";
  
    src = fetchPypi {
      inherit pname version;
  