def METHOD_NAME(self, wire):
    face = BluemiraFace(wire)
    solid = extrude_shape(face, (10, 1, 1))
    biggest_face = sorted(solid.faces, key=lambda face: face.area)[-1]
    normal_1 = biggest_face.normal_at(0, 0)
    normal_2 = biggest_face.normal_at(0.5, 0.5)
    assert not np.allclose(normal_1, normal_2)