diff --git a/stix2/test/v21/test_threat_actor.py b/stix2/test/v21/test_threat_actor.py
index ecd7b00..6a782ef 100644
--- a/stix2/test/v21/test_threat_actor.py
+++ b/stix2/test/v21/test_threat_actor.py
@@ -90,5 +90,4 @@ def test_seen_ordering_constraint():
     )
 
 
-
 # TODO: Add other examples