diff --git a/builder/test/tests.py b/builder/test/tests.py
index 2af19852..33bbc2cc 100755
--- a/builder/test/tests.py
+++ b/builder/test/tests.py
@@ -30,6 +30,7 @@ import tf2_geometry_msgs
 
 import VL53L1X
 import pymavlink
+import lxml
 from pymavlink import mavutil
 import rpi_ws281x
 import pigpio