diff --git a/test_tools/fs_utils.py b/test_tools/fs_utils.py
index 648f1b3..0ed99ff 100644
--- a/test_tools/fs_utils.py
+++ b/test_tools/fs_utils.py
@@ -8,10 +8,10 @@
 import base64
 import math
 import textwrap
+from collections import namedtuple
+from datetime import datetime, timedelta
 
 from aenum import IntFlag, Enum
-from collections import namedtuple
-from datetime import datetime
 
 from core.test_run import TestRun
 from test_tools.dd import Dd
diff --git a/test_utils/filesystem/file.py b/test_utils/filesystem/file.py
index 6848598..e8a8130 100644
--- a/test_utils/filesystem/file.py
+++ b/test_utils/filesystem/file.py
@@ -1,9 +1,10 @@
 #
 # Copyright(c) 2019-2021 Intel Corporation
+# Copyright(c) 2023-2024 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
+from datetime import timedelta
 
-from core.test_run import TestRun
 from test_tools import fs_utils
 from test_tools.dd import Dd
 from test_utils.filesystem.fs_item import FsItem