diff --git a/scripts/diff_jsons.py b/scripts/diff_jsons.py
index 07310f986..1b0c65815 100644
--- a/scripts/diff_jsons.py
+++ b/scripts/diff_jsons.py
@@ -24,7 +24,7 @@
 
     # Test for most fatal errors in regex path usage
     # Exclude regexes should never match `'`, otherwise the diff is always going to pass
-    for regex in args.exclude_regex_paths:
+    for regex in args.exclude_regex_paths or []:
         result = re.compile(regex).search("'")
         if result is not None:
             print(