diff --git a/tests/clang_format_utils.py b/tests/clang_format_utils.py
index 1391fdcd47..ec20c7bae8 100644
--- a/tests/clang_format_utils.py
+++ b/tests/clang_format_utils.py
@@ -10,7 +10,7 @@
 # limitations under the License.
 
 # this file is adapted from
-# github/pytorch/pytorch/blob/63d62d3e44a0a4ec09d94f30381d49b78cc5b095/tools/clang_format_utils.py
+# https://github.com/pytorch/pytorch/blob/v1.9.1/tools/clang_format_utils.py.
 
 import os
 import platform
@@ -32,10 +32,11 @@
 }
 
 # This dictionary maps each platform to a relative path to a file containing its reference hash.
-# github/pytorch/pytorch/tree/63d62d3e44a0a4ec09d94f30381d49b78cc5b095/tools/clang_format_hash
+# Refer to: https://github.com/pytorch/pytorch/tree/master/tools/clang_format_hash.
+# Note: the hash value may need update when the `clang-format` package is updated in Amazon S3.
 PLATFORM_TO_HASH = {
-    "Darwin": "b24cc8972344c4e01afbbae78d6a414f7638ff6f",
-    "Linux": "9073602de1c4e1748f2feea5a0782417b20e3043",
+    "Darwin": "acfda23b360824017c86528f6d59769bd4cf5587",
+    "Linux": "938869fb71b05f5ba345ab36dfbbc4388f53a550",
 }
 
 # Directory and file paths for the clang-format binary.