np.random.uniform(size=y_shape), dtype=dtypes.float32
    )
    if use_kernel:
      model.einsum = model.einsum_with_kernel
      model_inputs = {'x': x}
    else:
      model.einsum = model.einsum_without_kernel
      model_inputs = {'x': x, 'y': y}

    saved_model_save.save(
        model, self._input_saved_model_path, signatures=model.einsum
    )