diff --git a/ros2caret/verb/check_ctf.py b/ros2caret/verb/check_ctf.py
index 9a8030a8..f65a5bbf 100644
--- a/ros2caret/verb/check_ctf.py
+++ b/ros2caret/verb/check_ctf.py
@@ -23,7 +23,7 @@
 
 
 class CheckCTFVerb(VerbExtension):
-    
+
     def add_arguments(self, parser, cli_name):
         parser.add_argument(
             'trace_dir', type=str,