diff --git a/tilty/tilt_device.py b/tilty/tilt_device.py
index 9c57f5a..68aa203 100644
--- a/tilty/tilt_device.py
+++ b/tilty/tilt_device.py
@@ -4,6 +4,7 @@
 from datetime import datetime
 
 import bluetooth._bluetooth as bluez
+
 from tilty import blescan, constants
 from tilty.tilty import LOGGER
 
diff --git a/tox.ini b/tox.ini
index 2495760..0020e75 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 isolated_build = True
-envlist = py39
+envlist = py38
 skipsdist = True
 toxworkdir=.tox
 usedevelop=True