WIP: tried every permutation of what you should do to check for windows

tests/conftest.py

@@ -118,6 +118,7 @@ async def fail_test_on_unclosed_tasks(request: FixtureRequest):
     Used on every test to ensure failure if there are pending tasks
     by the end of the test.
     """
+    raise RuntimeError(sys.platform)
 
     try:
         fail_count = request.session.testsfailed