       %{relationship_to_current_user: nil},
     ]
 
-    assert etag(user) == etag(user)
     for change <- changes do
       new_user = Map.merge(user, change)
-      assert etag(user) != etag(new_user)
+      refute etag(user) == etag(new_user)
     end
   end
 

      %{author: Factory.build(:user, %{updated_at: other_date})},
    ]

    assert etag(post) == etag(post)
    for change <- changes do
      new_post = Map.merge(post, change)
      assert etag(post) != etag(new_post)
    end
  end


                        |> DateTime.from_unix

    {:ok, date: date, other_date: other_date}
  end

  test "returns unique strings" do
