Fix tests

tests/components/binary_sensor/test_nx584.py

@@ -40,6 +40,7 @@ class TestNX584SensorSetup(unittest.TestCase):
     def test_setup_no_config(self):
         """Test the setup with no configuration."""
         hass = mock.MagicMock()
+        hass.pool.worker_count = 2
         assert setup_component(hass, 'binary_sensor', {'nx584': {}})
 
     @mock.patch('homeassistant.components.binary_sensor.nx584.NX584Watcher')