Why tested protocols are suffixed by Spy and not Mock ?

[vince4]

I try to understand the difference between Mock and Spy in Unit Test. I found in CleanStore that every mock/spy is suffixed with Spy. But in this article, it's explained that Spy are real objects whereas Mock, new test objects doing nothing :

The difference is that in mock, you are creating a complete mock or fake object while in spy, there is the real object and you just spying or stubbing specific methods of it.

An exemple of Mock in CleanStore :

class ListOrdersPresentationLogicSpy: ListOrdersPresentationLogic
  {
    // MARK: Method call expectations

    var presentFetchedOrdersCalled = false

    // MARK: Spied methods

    func presentFetchedOrders(response: ListOrders.FetchOrders.Response)
    {
      presentFetchedOrdersCalled = true
    }
  }

So should you rename ListOrdersPresentationLogicSpy to ListOrdersPresentationLogicMock, or did I misunderstood something ?