diff --git a/scripts/JSON_data_files_validator.py b/scripts/JSON_data_files_validator.py
index 5af5f6f154..fd96966464 100644
--- a/scripts/JSON_data_files_validator.py
+++ b/scripts/JSON_data_files_validator.py
@@ -398,7 +398,7 @@ def __validate_file(self, file_path):
                 base = basename[0:index]
                 #FIXME: files = get_complete_dataset...
                 files = [os.path.join(dirname, f) for f in os.listdir(dirname)
-                         if f.startswith(base)]
+                         if f.startswith(base) and (f.endswith(".json") or f.endswith(".json.br"))]
                 print(files) #REMOVE_ME / logging
                 all_jsons = [get_json(file) for file in files]
             else: