anchor.diff:    };
   
     pytest = buildPythonPackage rec {
  -    name = "pytest-2.5.1";
  +    name = "pytest-2.6.2";
   
       src = fetchurl {
         url = "http://pypi.python.org/packages/source/p/pytest/${name}.tar.gz";
  -      md5 = "4e155a0134e6757b37cc6698c20f3e9f";
  +      md5 = "0a1735fb1d481ef3864f34678607ba85";
       };
   
       preCheck = ''
  -      # broken on python3, fixed in master, remove in next release
  -      rm doc/en/plugins_index/test_plugins_index.py
  -
         # don't test bash builtins
         rm testing/test_argcomplete.py
  -
  -      # yaml test are failing
  -      rm doc/en/example/nonpython/test_simple.yml
       '';
   
       propagatedBuildInputs = [ py ]
  
positive.code:         pythonPackages.selenium;
  
      meta = with stdenv.lib; {
        maintainers = with maintainers; [ iElectric lovek323 ];
        platforms = platforms.unix;
      };
    };
  
negative.code: 
  
    py = buildPythonPackage rec {
      name = "py-1.4.24";
  
      src = fetchurl {
        url = "https://pypi.python.org/packages/source/p/py/${name}.tar.gz";
        md5 = "8f32ee0cd1e01472a255fe1d28d81217";
      };
    };
  
  