--- a/tests/functional/test_clidriver.py
+++ b/tests/functional/test_clidriver.py
@@ -46,6 +46,7 @@ class TestSession(BaseCLIDriverTest):
         self._responses = []

     def tearDown(self):
+        super(TestSession, self).tearDown()
         self._urllib3_patch.stop()

     def get_response(self, request):