diff --git a/hbt/inference/test_unc.py b/hbt/inference/test_unc.py
index 32220075..03414cd4 100644
--- a/hbt/inference/test_unc.py
+++ b/hbt/inference/test_unc.py
@@ -1,5 +1,6 @@
 from columnflow.inference import inference_model, ParameterType
 
+
 @inference_model
 def test_unc(self):
     self.add_category(