diff --git a/homeassistant/components/mystrom/__init__.py b/homeassistant/components/mystrom/__init__.py
index 96bc49ca853..3b033e3338c 100644
--- a/homeassistant/components/mystrom/__init__.py
+++ b/homeassistant/components/mystrom/__init__.py
@@ -16,7 +16,7 @@ from homeassistant.exceptions import ConfigEntryNotReady
 from .const import DOMAIN
 from .models import MyStromData
 
-PLATFORMS_PLUGS = [Platform.SWITCH, Platform.SENSOR]
+PLATFORMS_PLUGS = [Platform.SENSOR, Platform.SWITCH]
 PLATFORMS_BULB = [Platform.LIGHT]
 
 _LOGGER = logging.getLogger(__name__)
@@ -43,7 +43,6 @@ def _get_mystrom_switch(host: str) -> MyStromSwitch:
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up myStrom from a config entry."""
     host = entry.data[CONF_HOST]
-    device = None
     try:
         info = await pymystrom.get_device_info(host)
     except MyStromConnectionError as err:
diff --git a/homeassistant/components/mystrom/sensor.py b/homeassistant/components/mystrom/sensor.py
index 982528bd97c..606a6275acf 100644
--- a/homeassistant/components/mystrom/sensor.py
+++ b/homeassistant/components/mystrom/sensor.py
@@ -64,7 +64,6 @@ class MyStromSwitchSensor(SensorEntity):
     """Representation of the consumption or temperature of a myStrom switch/plug."""
 
     entity_description: MyStromSwitchSensorEntityDescription
-    device: MyStromSwitch
 
     _attr_has_entity_name = True