def _copy_xauthority_file(self, directory):
        """ Copy .Xauthority file to directory, if it exists in /home
        """
        # If running under xvfb, as jenkins does,
        # xsession will fail to start without xauthority file
        # Thus if the Xauthority file is in the home directory
        # make sure we copy it to our temp home directory

        xauth = os.path.expanduser(os.path.join(os.environ.get('HOME'),
                                   '.Xauthority'))
        if os.path.isfile(xauth):
            logger.debug("Copying .Xauthority to %s" % directory)
            shutil.copyfile(
                os.path.expanduser(os.path.join(os.environ.get('HOME'),
                                   '.Xauthority')),
                os.path.join(directory, '.Xauthority'))