def METHOD_NAME(rng, ctx, func_name, w_shape, channel_axis, eps, output_stat):
    from nbla_test_utils import backward_function_tester
    w = np.array(rng.randn(*w_shape).astype(np.float32))
    backward_function_tester(rng, F.weight_standardization,
                             inputs=[w],
                             func_args=[channel_axis, eps, output_stat],
                             ctx=ctx)