working, passing tests in django 3.2

rowers/tests/mocks.py

@@ -16,7 +16,7 @@ import re
 from parameterized import parameterized
 from django.test import TestCase, Client,override_settings
 from django.core.management import call_command
-from django.utils.six import StringIO
+
 from django.test.client import RequestFactory
 from rowers.views import c2_open
 from rowers.models import Workout, User, Rower, WorkoutForm,RowerForm,GraphImage