diff --git a/selfdrive/hardware/tici/power_monitor.py b/selfdrive/hardware/tici/power_monitor.py
index 987d688e..e9d76908 100755
--- a/selfdrive/hardware/tici/power_monitor.py
+++ b/selfdrive/hardware/tici/power_monitor.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-import os
 import sys
 import time
 
@@ -7,7 +6,6 @@ def average(avg, sample):
   # Weighted avg between existing value and new sample
   return ((avg[0] * avg[1] + sample) / (avg[1] + 1), avg[1] + 1)
 
-
 if __name__ == '__main__':
 
   sample_time = None
@@ -16,9 +14,9 @@ if __name__ == '__main__':
 
   start_time = time.monotonic()
   try:
-    voltage_average = (0., 0)  # average, count
-    current_average = (0., 0)
-    power_average = (0., 0)
+    voltage_average = (0, 0)  # average, count
+    current_average = (0, 0)
+    power_average = (0, 0)
     while sample_time is None or time.monotonic() - start_time < sample_time:
       with open("/sys/bus/i2c/devices/0-0040/hwmon/hwmon1/in1_input") as f:
         voltage = int(f.read()) / 1000.