diff --git a/minitests/roi_harness/create_design_json.py b/minitests/roi_harness/create_design_json.py
index 3c7360a5..a6717dad 100644
--- a/minitests/roi_harness/create_design_json.py
+++ b/minitests/roi_harness/create_design_json.py
@@ -3,8 +3,11 @@ import csv
 import argparse
 import sys
 
+
 def main():
-    parser = argparse.ArgumentParser(description="Creates design.json from output of ROI generation tcl script.")
+    parser = argparse.ArgumentParser(
+        description=
+        "Creates design.json from output of ROI generation tcl script.")
     parser.add_argument('--design_txt', required=True)
     parser.add_argument('--design_info_txt', required=True)
 
@@ -25,5 +28,6 @@ def main():
 
     json.dump(j, sys.stdout, indent=2, sort_keys=True)
 
+
 if __name__ == '__main__':
     main()