diff --git a/tests/unittests/config/test_schema.py b/tests/unittests/config/test_schema.py
index f0dd7a5c05b..4892ffcdf5c 100644
--- a/tests/unittests/config/test_schema.py
+++ b/tests/unittests/config/test_schema.py
@@ -8,7 +8,6 @@
 import os
 import re
 import sys
-import unittest
 from collections import namedtuple
 from copy import deepcopy
 from errno import EACCES
@@ -152,7 +151,7 @@ def test_versioned_cloud_config_schema_is_valid_json(
             )
 
 
-class TestCheckSchema(unittest.TestCase):
+class TestCheckSchema:
     def test_schema_bools_have_dates(self):
         """ensure that new/changed/deprecated keys have an associated
         version key