anchor.diff:  
     disabled = isPy27;
   
  -  checkInputs = [ mock ];
  +  checkInputs = [
  +    mock
  +    pytestCheckHook
  +  ];
  +
  +  pytestFlagsArray = [ "tests.py" ];
  +  pythonImportsCheck = [ "pycognito" ];
   
     meta = with lib; {
       description = "Python class to integrate Boto3's Cognito client so it is easy to login users. With SRP support";
  
positive.code: 
    src = fetchFromGitHub {
      owner = "pvizeli";
      repo = "pycognito";
      rev = version;
      sha256 = "sha256-RJeHPCTuaLN+zB0N0FGt4qrTI6++1ks5iBn64Cx0Psc=";
    };
  
negative.code: , envs
  , python-jose
  , requests
  , pytestCheckHook
  , mock
  , isPy27
  }:
  