diff --git a/pytests/iroha_cli_tests/src/iroha_cli/iroha_cli.py b/pytests/iroha_cli_tests/src/iroha_cli/iroha_cli.py
index df750536a2..639d3c10fa 100644
--- a/pytests/iroha_cli_tests/src/iroha_cli/iroha_cli.py
+++ b/pytests/iroha_cli_tests/src/iroha_cli/iroha_cli.py
@@ -286,9 +286,7 @@ def _read_and_update_json(self, template_filename, changes=None):
             for key_path, value in changes.items():
                 element = data[0]
                 for key in key_path[:-1]:
-                    element = element[
-                        key
-                    ]
+                    element = element[key]
                 element[key_path[-1]] = value
 
         json_temp_file_path = Path(ISI_PATH) / f"isi_{template_filename}"