diff --git a/tempest/api/object_storage/test_object_temp_url.py b/tempest/api/object_storage/test_object_temp_url.py
index e75e22a..4ca7412 100644
--- a/tempest/api/object_storage/test_object_temp_url.py
+++ b/tempest/api/object_storage/test_object_temp_url.py
@@ -78,7 +78,7 @@
 
         hmac_body = '%s\n%s\n%s' % (method, expires, path)
         sig = hmac.new(
-            key.encode(), hmac_body.encode(), hashlib.sha1
+            key.encode(), hmac_body.encode(), hashlib.sha256
         ).hexdigest()
 
         url = "%s/%s?temp_url_sig=%s&temp_url_expires=%s" % (container,
diff --git a/tempest/api/object_storage/test_object_temp_url_negative.py b/tempest/api/object_storage/test_object_temp_url_negative.py
index 4ad8428..e5f4cf2 100644
--- a/tempest/api/object_storage/test_object_temp_url_negative.py
+++ b/tempest/api/object_storage/test_object_temp_url_negative.py
@@ -83,7 +83,7 @@
 
         hmac_body = '%s\n%s\n%s' % (method, expires, path)
         sig = hmac.new(
-            key.encode(), hmac_body.encode(), hashlib.sha1
+            key.encode(), hmac_body.encode(), hashlib.sha256
         ).hexdigest()
 
         url = "%s/%s?temp_url_sig=%s&temp_url_expires=%s" % (container,