Use helper anext

Author: NoahStapp

test/asynchronous/test_custom_types.py

@@ -52,6 +52,7 @@
 from bson.int64 import Int64
 from bson.raw_bson import RawBSONDocument
 from pymongo.asynchronous.collection import ReturnDocument
+from pymongo.asynchronous.helpers import anext
 from pymongo.errors import DuplicateKeyError
 from pymongo.message import _CursorAddress
 

test/test_custom_types.py

@@ -54,6 +54,7 @@
 from pymongo.errors import DuplicateKeyError
 from pymongo.message import _CursorAddress
 from pymongo.synchronous.collection import ReturnDocument
+from pymongo.synchronous.helpers import next
 
 _IS_SYNC = True