test_connect_four: Expand star import.
from zulip_bots.test_lib import BotTestCase, DefaultTests
-from zulip_bots.bots.connect_four.connect_four import *
+from zulip_bots.bots.connect_four.connect_four import ConnectFourModel
from zulip_bots.game_handler import BadMoveException
from typing import Dict, List
