Author arturhoo
Recipients arturhoo, asvetlov, yselivanov
Date 2020-02-11.19:51:36
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <>
This means that subsequent test cases executed within the same application that don't create the event loop will fail. This seems like a behaviour change that wasn't raised on the original PR.

$ cat
from unittest import IsolatedAsyncioTestCase, TestCase, main
import asyncio

class Test1(IsolatedAsyncioTestCase):
    async def test_one(self):

class Test2(TestCase):
    def test_two(self):
        loop = asyncio.get_event_loop()

if __name__ == "__main__":
$ /usr/local/opt/python@3.8/bin/python3
ERROR: test_two (__main__.Test2)
Traceback (most recent call last):
  File "", line 13, in test_two
    loop = asyncio.get_event_loop()
  File "/usr/local/Cellar/python@3.8/3.8.1/Frameworks/Python.framework/Versions/3.8/lib/python3.8/asyncio/", line 639, in get_event_loop
    raise RuntimeError('There is no current event loop in thread %r.'
RuntimeError: There is no current event loop in thread 'MainThread'.

Ran 2 tests in 0.006s

FAILED (errors=1)
$ uname -a
Darwin arturhoo-mbp 18.7.0 Darwin Kernel Version 18.7.0: Sun Dec  1 18:59:03 PST 2019; root:xnu-4903.278.19~1/RELEASE_X86_64 x86_64
Date User Action Args
2020-02-11 19:51:37arturhoosetrecipients: + arturhoo, asvetlov, yselivanov
2020-02-11 19:51:37arturhoosetmessageid: <>
2020-02-11 19:51:37arturhoolinkissue39613 messages
2020-02-11 19:51:36arturhoocreate