Merge branch 'master' into PYTHON-5078

Author: sleepyStick

test/asynchronous/pymongo_mocks.py

@@ -66,7 +66,7 @@ def __init__(self, server_description, topology, pool, topology_settings):
     def cancel_check(self):
         pass
 
-    def join(self):
+    async def join(self):
         pass
 
     def open(self):