def METHOD_NAME(
    self, mockRConfig
):
    running_config = self._nets_config(NET2_SETUP, default_route=True)
    requested_nets = _merge_dicts(
        self._nets_config(NET0_SETUP, default_route=True),
        self._nets_config(NET1_SETUP, default_route=True),
        self._nets_config(NET2_SETUP, default_route=False),
    )
    mockRConfig.return_value.networks = running_config
    with pytest.raises(ne.ConfigNetworkError):
        canonicalize.canonicalize_networks(requested_nets)