diff --git a/mongoengine/context_managers.py b/mongoengine/context_managers.py
index 150f9657..ec2e9e8b 100644
--- a/mongoengine/context_managers.py
+++ b/mongoengine/context_managers.py
@@ -1,6 +1,6 @@
-from mongoengine.common import _import_class
 from contextlib import contextmanager
 from pymongo.write_concern import WriteConcern
+from mongoengine.common import _import_class
 from mongoengine.connection import DEFAULT_CONNECTION_NAME, get_db
 
 
diff --git a/mongoengine/queryset/base.py b/mongoengine/queryset/base.py
index 2a1bf3ad..f78ee882 100644
--- a/mongoengine/queryset/base.py
+++ b/mongoengine/queryset/base.py
@@ -18,7 +18,7 @@ from mongoengine import signals
 from mongoengine.base import get_document
 from mongoengine.common import _import_class
 from mongoengine.connection import get_db
-from mongoengine.context_managers import switch_db, set_write_concern
+from mongoengine.context_managers import set_write_concern, switch_db
 from mongoengine.errors import (InvalidQueryError, LookUpError,
                                 NotUniqueError, OperationError)
 from mongoengine.python_support import IS_PYMONGO_3