diff --git a/graphene_django/utils/testing.py b/graphene_django/utils/testing.py
index 7c9b15225..a419c7dc6 100644
--- a/graphene_django/utils/testing.py
+++ b/graphene_django/utils/testing.py
@@ -1,6 +1,6 @@
 import json
 
-from django.test import TestCase, Client
+from django.test import TestCase
 
 DEFAULT_GRAPHQL_URL = "/graphql/"
 
@@ -68,12 +68,6 @@ class GraphQLTestCase(TestCase):
     # URL to graphql endpoint
     GRAPHQL_URL = DEFAULT_GRAPHQL_URL
 
-    @classmethod
-    def setUpClass(cls):
-        super(GraphQLTestCase, cls).setUpClass()
-
-        cls._client = Client()
-
     def query(self, query, op_name=None, input_data=None, variables=None, headers=None):
         """
         Args:
@@ -99,7 +93,7 @@ def query(self, query, op_name=None, input_data=None, variables=None, headers=No
             input_data=input_data,
             variables=variables,
             headers=headers,
-            client=self._client,
+            client=self.client,
             graphql_url=self.GRAPHQL_URL,
         )