Python 解决通道/异步测试用例上的django测试运行时错误

我正试图为我的django（3.2）通道消费者编写一个测试用例，以实现websocket通信。我已经设法让testcase通过，但现在看来，在尝试清理测试数据库时，testcase拆卸失败了

System check identified no issues (0 silenced).
.
----------------------------------------------------------------------
Ran 1 test in 0.130s

OK
Destroying test database for alias 'default'...

...

psycopg2.errors.ObjectInUse: database "test_myproject" is being accessed by other users
DETAIL:  There is 1 other session using the database.

...
  File ".../python3.8/site-packages/django/core/management/commands/test.py", line 55, in handle
    failures = test_runner.run_tests(test_labels)
  File ".../python3.8/site-packages/django/test/runner.py", line 736, in run_tests
    self.teardown_databases(old_config)
  File ".../python3.8/site-packages/django/test/runner.py", line 674, in teardown_databases
    _teardown_databases(
  File ".../python3.8/site-packages/django/test/utils.py", line 313, in teardown_databases
    connection.creation.destroy_test_db(old_name, verbosity, keepdb)
  File ".../python3.8/site-packages/django/db/backends/base/creation.py", line 282, in destroy_test_db
    self._destroy_test_db(test_database_name, verbosity)
  File ".../python3.8/site-packages/django/db/backends/base/creation.py", line 298, in _destroy_test_db
    cursor.execute("DROP DATABASE %s"
  File ".../python3.8/contextlib.py", line 162, in __exit__
    raise RuntimeError("generator didn't stop after throw()")
RuntimeError: generator didn't stop after throw()

消费者是使用async编写的，似乎我在async如何与测试用例集成方面遇到了问题。为了让测试用例正常运行，我还需要做什么

我创建并配置了一个fixture将数据加载到数据库中，并怀疑这与那里的testcase db交互有关

我尝试用标准的django“TestCase”代替“TransactionTestCase”，但显然配置的fixture没有按预期加载到db中

类ConsumerTestCase（TransactionTestCase）：
固定装置=（“基本数据”）
异步def测试\警报消费者\接收\有效（自）：
#在夹具中定义
username=“测试用户名”
警报\u id=1
url=“/alerts/ws/”
communicator=WebsocketCommunicator（AlertConsumer.as_asgi（），url）
已连接，subtocol=wait communicator.connect（）
断言连接
message={“username”：“me”，“alert_id”：1}
等待communicator.send_to（text_data=json.dumps（message））
响应=等待通讯器。从（）接收
预期={
“消息”：“已接受”
}
self.assertDictEqual（实际、预期）