diff --git a/boards/tests.py b/boards/tests.py
--- a/boards/tests.py
+++ b/boards/tests.py
@@ -96,4 +96,4 @@ class BoardTests(TestCase):
 
         thread = Post.objects.get_thread(op_id)
 
-        self.assertEqual(3, thread.__len__())
+        self.assertEqual(3, len(thread))