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

tests/helpers/test_entity_platform.py

@@ -2,9 +2,7 @@
 import asyncio
 from datetime import timedelta
 import logging
-from unittest.mock import MagicMock, Mock, patch
 
-import asynctest
 import pytest
 
 from homeassistant.const import UNIT_PERCENTAGE
@@ -18,6 +16,7 @@ from homeassistant.helpers.entity_component import (
 )
 import homeassistant.util.dt as dt_util
 
+from tests.async_mock import Mock, patch
 from tests.common import (
     MockConfigEntry,
     MockEntity,
@@ -136,7 +135,7 @@ async def test_update_state_adds_entities_with_update_before_add_false(hass):
     assert not ent.update.called
 
 
-@asynctest.patch("homeassistant.helpers.entity_platform.async_track_time_interval")
+@patch("homeassistant.helpers.entity_platform.async_track_time_interval")
 async def test_set_scan_interval_via_platform(mock_track, hass):
     """Test the setting of the scan interval via platform."""
 
@@ -183,7 +182,7 @@ async def test_platform_warn_slow_setup(hass):
 
     component = EntityComponent(_LOGGER, DOMAIN, hass)
 
-    with patch.object(hass.loop, "call_later", MagicMock()) as mock_call:
+    with patch.object(hass.loop, "call_later") as mock_call:
         await component.async_setup({DOMAIN: {"platform": "platform"}})
         assert mock_call.called