anchor.diff:      toml
       wcwidth
     ] ++ lib.optionals (pythonOlder "3.6") [ pathlib2 ];
  +
  +  checkInputs = [
  +    hypothesis
  +    pygments
  +  ];
   
     doCheck = !isPyPy; # https://github.com/pytest-dev/pytest/issues/3460
   
  
positive.code:   ];
  
    meta = with lib; {
      homepage = "https://docs.pytest.org";
      description = "Framework for writing tests";
      maintainers = with maintainers; [ domenkozar lovek323 madjar lsix ];
      license = licenses.mit;
    };
  
negative.code: { lib, buildPythonPackage, pythonOlder, fetchPypi, isPy3k, isPyPy
  , atomicwrites
  , attrs
  , hypothesis
  , iniconfig
  , more-itertools
  , packaging
  , pathlib2
  , pluggy
  , py
  , pygments
  , setuptools
  , setuptools-scm
  , six
  , toml
  , wcwidth
  