def METHOD_NAME(self):
    a = num.random.rand(self.n).astype(np.float64)
    msg = "Array must be at least two-dimensional"
    with pytest.raises(num.linalg.LinAlgError, match=msg):
        num.linalg.solve(a, self.b)
    a = 10
    msg = "Array must be at least two-dimensional"
    with pytest.raises(num.linalg.LinAlgError, match=msg):
        num.linalg.solve(a, self.b)