def METHOD_NAME(self):
    outfile = 'filename.png'
    self.addCleanup(self.remove_file_if_exists, outfile)
    cmdline = self.prefix
    cmdline += ' --virtual-mfa-device-name fiebaz'
    cmdline += ' --outfile %s --bootstrap-method QRCodePNG' % outfile
    result = {"VirtualMFADeviceName": 'fiebaz'}
    self.assert_params_for_cmd(cmdline, result)
    self.assertTrue(os.path.exists(outfile))