diff --git a/gracedb/alerts/tests/test_phone.py b/gracedb/alerts/tests/test_phone.py
index 3ee8df3dfeced3f258fed740d619c8e4d7799272..16366477608165ced9b1767a78eb0b66c9557215 100644
--- a/gracedb/alerts/tests/test_phone.py
+++ b/gracedb/alerts/tests/test_phone.py
@@ -295,6 +295,8 @@ class TestTwimlUrl(GraceDbTestBase, SupereventCreateMixin):
 
 @mock.patch('alerts.phone.twilio_client.messages.create')
 @mock.patch('alerts.phone.twilio_client.calls.create')
+@mock.patch('alerts.phone.twilio_client.incoming_phone_numbers.list',
+            lambda: [mock.Mock()])
 class TestPhoneCallAndText(GraceDbTestBase, SupereventCreateMixin):
 
     @classmethod