From 3daecffe6b7e472f1260a3e690bd507f94e85a8e Mon Sep 17 00:00:00 2001
From: Rustam Ganeyev <rganeyev@gmail.com>
Date: Fri, 1 Jan 2021 19:46:00 +0000
Subject: [PATCH] fixed test

---
 graphene_django/rest_framework/tests/test_mutation.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/graphene_django/rest_framework/tests/test_mutation.py b/graphene_django/rest_framework/tests/test_mutation.py
index c8e19ec..5c2518d 100644
--- a/graphene_django/rest_framework/tests/test_mutation.py
+++ b/graphene_django/rest_framework/tests/test_mutation.py
@@ -111,7 +111,7 @@ def test_model_serializer_optional_fields():
     class MyMutation(SerializerMutation):
         class Meta:
             serializer_class = MyModelSerializer
-            optional_fields = "cool_name"
+            optional_fields = ("cool_name",)
 
     assert "cool_name" in MyMutation.Input._meta.fields
     assert MyMutation.Input._meta.fields["cool_name"].type == String