Fix vizio async mock fixtures on Python 3.8.0 and .1 (#39926)

tests/components/vizio/conftest.py

@@ -22,7 +22,7 @@ from .const import (
     MockStartPairingResponse,
 )
 
-from tests.async_mock import patch
+from tests.async_mock import AsyncMock, patch
 
 
 class MockInput:
@@ -53,7 +53,7 @@ def vizio_get_unique_id_fixture():
     """Mock get vizio unique ID."""
     with patch(
         "homeassistant.components.vizio.config_flow.VizioAsync.get_unique_id",
-        return_value=UNIQUE_ID,
+        AsyncMock(return_value=UNIQUE_ID),
     ):
         yield
 
@@ -83,7 +83,7 @@ def vizio_connect_fixture():
     """Mock valid vizio device and entry setup."""
     with patch(
         "homeassistant.components.vizio.config_flow.VizioAsync.validate_ha_config",
-        return_value=True,
+        AsyncMock(return_value=True),
     ):
         yield
 
@@ -156,7 +156,7 @@ def vizio_cant_connect_fixture():
     """Mock vizio device can't connect with valid auth."""
     with patch(
         "homeassistant.components.vizio.config_flow.VizioAsync.validate_ha_config",
-        return_value=False,
+        AsyncMock(return_value=False),
     ):
         yield