diff --git a/tests/app/main/views/test_conversation.py b/tests/app/main/views/test_conversation.py
index e0d4c6638..fbd24fbcf 100644
--- a/tests/app/main/views/test_conversation.py
+++ b/tests/app/main/views/test_conversation.py
@@ -79,7 +79,7 @@ def test_view_conversation(
     mock_get_inbound_sms
 ):
 
-    mock_get_notifications(
+    mock = mock_get_notifications(
         mocker,
         api_user_active,
         template_content='Hello ((name))',
@@ -158,6 +158,8 @@ def test_view_conversation(
             normalize_spaces(statuses[index].text),
         ) == expected
 
+    mock.assert_called_once_with(SERVICE_ONE_ID, to='07123 456789', template_type='sms')
+
 
 def test_view_conversation_updates(
     logged_in_client,