diff --git a/vcr/unittest/testcase.py b/vcr/unittest/testcase.py
index 65e089c..371193f 100644
--- a/vcr/unittest/testcase.py
+++ b/vcr/unittest/testcase.py
@@ -5,7 +5,7 @@ import unittest
 from .. import VCR
 
 
-class VCRMixin(object):
+class VCRMixin:
     """A TestCase mixin that provides VCR integration."""
 
     vcr_enabled = True