Use 'usefixtures' decorator in test_component_streaming_message

src/backend/tests/unit/custom/custom_component/test_component_events.py

@@ -188,7 +188,7 @@ def log_callback(*, manager: EventManager, event_type: str, data: dict):  # noqa
     assert event_id.startswith("info-")
 
 
-@pytest.mark.asyncio
+@pytest.mark.usefixtures("client")
 async def test_component_streaming_message():
     """Test component's streaming message functionality."""
     queue = await create_event_queue()