diff --git a/hardware-testing/hardware_testing/drivers/asair_sensor.py b/hardware-testing/hardware_testing/drivers/asair_sensor.py
index f520da4c30b..beb225f9d55 100644
--- a/hardware-testing/hardware_testing/drivers/asair_sensor.py
+++ b/hardware-testing/hardware_testing/drivers/asair_sensor.py
@@ -4,12 +4,11 @@
 pipette gravimetric fixture. The sensor outputs temperature and
 relative humidity that is recorded onto the pipette results.
 """
-
 import abc
 import codecs
 import logging
 import time
-from typing import Tuple, Optional
+from typing import Tuple
 from abc import ABC
 from dataclasses import dataclass
 from . import list_ports_and_select