tests: add missing imports

tests/devices/test_duux_blizzard.py

@@ -1,6 +1,7 @@
 from homeassistant.components.climate.const import HVACMode
 
 from ..const import DUUX_BLIZZARD_PAYLOAD
+from ..helpers import assert_device_properties_set
 from ..mixins.climate import TargetTemperatureTests
 from .base_device_tests import TuyaDeviceTestCase
 

tests/devices/test_smartplugv2_energy.py

@@ -13,6 +13,7 @@ from homeassistant.const import (
 )
 
 from ..const import SMARTSWITCH_ENERGY_PAYLOAD
+from ..helpers import assert_device_properties_set
 from ..mixins.binary_sensor import BasicBinarySensorTests
 from ..mixins.number import BasicNumberTests
 from ..mixins.select import BasicSelectTests