anchor.diff:      };
   
       buildInputs = [ unittest2 ];
  -    
  +
       doCheck = !isPyPy;
   
       meta = {
  
positive.code:       url = "http://pypi.python.org/packages/source/W/WebTest/WebTest-${version}.zip";
        md5 = "49314bdba23f4d0bd807facb2a6d3f90";
      };
      
      preConfigure = ''
        substituteInPlace setup.py --replace "nose<1.3.0" "nose"
      '';
  
negative.code: 
      # error: invalid command 'test'
      doCheck = false;
  
      propagatedBuildInputs = [ isodate ];
  
      meta = {
  