def test_probabilistic_forecast_accuracy_multivariate(self, config):
        """Test on multivariate series, when supported"""
        model_cls, model_kwargs, _, err = config
        model = model_cls(**model_kwargs)
        if model.supports_multivariate:
            self.helper_test_probabilistic_forecast_accuracy(
                model,
                err,
                self.constant_multivar_ts,
                self.constant_noisy_multivar_ts,
            )
Test on multivariate series, when supported
darts/tests/models/forecasting/test_probabilistic_models.py