diff --git a/tests/components/whirlpool/test_sensor.py b/tests/components/whirlpool/test_sensor.py
index 0c097d07296..4d8db71682b 100644
--- a/tests/components/whirlpool/test_sensor.py
+++ b/tests/components/whirlpool/test_sensor.py
@@ -23,7 +23,7 @@ DRYER_ENTITY_ID_BASE = "sensor.dryer"
 
 async def trigger_attr_callback(
     hass: HomeAssistant, mock_api_instance: MagicMock
-) -> State:
+) -> None:
     """Simulate an update trigger from the API."""
 
     for call in mock_api_instance.register_attr_callback.call_args_list: