convex hull test cases

Hi,

I would like to give some feedback about https://py.checkio.org/mission/convex-hull/solve/. In the attached, I have a draft of my solution that meets the immediate test cases in the assertions on the module, but then fails checkio([[2,5],[5,5],[5,2],[2,2]]). I notice my output is in fact the same points as the test expects, and is also clockwise like the Mission Info states. The only difference is that the seed point is different for both answers. This however is not a condition of the mission, is it? unless I am missing something?