diff --git a/tests/test_physics.py b/tests/test_physics.py
index ae50f4f..f3e6ba2 100644
--- a/tests/test_physics.py
+++ b/tests/test_physics.py
@@ -21,9 +21,9 @@
 import os
 
 import matplotlib.pyplot as plt
-import uproot4
 import tensorflow as tf
 import uproot
+import uproot4
 
 from phasespace import phasespace
 from phasespace.backend import tnp