diff --git a/nvflare/app_common/executors/task_script_runner.py b/nvflare/app_common/executors/task_script_runner.py
index 1c26a56675..8a5f937cf6 100644
--- a/nvflare/app_common/executors/task_script_runner.py
+++ b/nvflare/app_common/executors/task_script_runner.py
@@ -60,7 +60,8 @@ def run(self):
                 xs = [p for p in sys.path if self.script_full_path.startswith(p)]
                 import_base_path = max(xs, key=len)
                 raise ImportError(
-                    f"{ie.msg}, the relative import is not support. python import is based off the sys.path: {import_base_path}")
+                    f"{ie.msg}, the relative import is not support. python import is based off the sys.path: {import_base_path}"
+                )
             else:
                 raise ie
         except Exception as e:
diff --git a/tests/unit_test/app_common/executors/task_script_runner_test.py b/tests/unit_test/app_common/executors/task_script_runner_test.py
index 72c3a3447e..4e19c81960 100644
--- a/tests/unit_test/app_common/executors/task_script_runner_test.py
+++ b/tests/unit_test/app_common/executors/task_script_runner_test.py
@@ -191,7 +191,7 @@ def test_run_relative_import_scripts(self):
             )
             self.assertTrue(wrapper.script_full_path.endswith(script_path))
             msg = "attempted relative import with no known parent package, the relative import is not support. python import is based off the sys.path: /home/chester/projects/NVFlare/tests/unit_test/app_common/executors/site-1/custom"
-            with pytest.raises(ImportError,match=msg):
+            with pytest.raises(ImportError, match=msg):
                 # check the ImportError
                 wrapper.run()
         finally: