def test_alpha_grid(self):
        (alpha, epsilon), mse = self.cobra_diagnostics.optimal_alpha_grid(self.test_data[0], self.test_response[0])
        expected_alpha, expected_mse = 1, 0.01331659692231877
        self.assertEqual(expected_alpha, alpha)
        self.assertAlmostEqual(expected_mse, mse[0], places=3)