Use built-in test helpers on 3.8 (#34901)

tests/components/auth/test_indieauth.py

@@ -1,12 +1,11 @@
 """Tests for the client validator."""
 import asyncio
-from unittest.mock import patch
 
 import pytest
 
 from homeassistant.components.auth import indieauth
 
-from tests.common import mock_coro
+from tests.async_mock import patch
 from tests.test_util.aiohttp import AiohttpClientMocker
 
 
@@ -113,9 +112,7 @@ async def test_verify_redirect_uri():
         None, "http://ex.com", "http://ex.com/callback"
     )
 
-    with patch.object(
-        indieauth, "fetch_redirect_uris", side_effect=lambda *_: mock_coro([])
-    ):
+    with patch.object(indieauth, "fetch_redirect_uris", return_value=[]):
         # Different domain
         assert not await indieauth.verify_redirect_uri(
             None, "http://ex.com", "http://different.com/callback"
@@ -174,9 +171,7 @@ async def test_find_link_tag_max_size(hass, mock_session):
 )
 async def test_verify_redirect_uri_android_ios(client_id):
     """Test that we verify redirect uri correctly for Android/iOS."""
-    with patch.object(
-        indieauth, "fetch_redirect_uris", side_effect=lambda *_: mock_coro([])
-    ):
+    with patch.object(indieauth, "fetch_redirect_uris", return_value=[]):
         assert await indieauth.verify_redirect_uri(
             None, client_id, "homeassistant://auth-callback"
         )