diff --git a/letsencrypt/tests/renewer_test.py b/letsencrypt/tests/renewer_test.py
index d68078c18..a690ddfc2 100644
--- a/letsencrypt/tests/renewer_test.py
+++ b/letsencrypt/tests/renewer_test.py
@@ -574,6 +574,7 @@ class RenewableCertTests(unittest.TestCase):
         self.test_rc.configfile["renewalparams"]["rsa_key_size"] = "2048"
         self.test_rc.configfile["renewalparams"]["server"] = "acme.example.com"
         self.test_rc.configfile["renewalparams"]["authenticator"] = "fake"
+        self.test_rc.configfile["renewalparams"]["dvsni_port"] = "4430"
         mock_auth = mock.MagicMock()
         mock_pd.PluginsRegistry.find_all.return_value = {"apache": mock_auth}
         # Fails because "fake" != "apache"