diff --git a/Lib/test/test_hmac.py b/Lib/test/test_hmac.py
index 3f6f756..839d019 100644
--- a/Lib/test/test_hmac.py
+++ b/Lib/test/test_hmac.py
@@ -1,3 +1,5 @@
+# coding: utf-8
+
 import hmac
 import hashlib
 import unittest