diff --git a/swift/common/middleware/s3api/s3request.py b/swift/common/middleware/s3api/s3request.py
index 2d1f7f2871..d4c33512de 100644
--- a/swift/common/middleware/s3api/s3request.py
+++ b/swift/common/middleware/s3api/s3request.py
@@ -910,7 +910,8 @@ class S3Request(swob.Request):
         headers = swob.HeaderKeyDict()
         headers.update(self._copy_source_headers())
 
-        src_resp = self.get_response(app, 'HEAD', src_bucket, src_obj,
+        src_resp = self.get_response(app, 'HEAD', src_bucket,
+                                     swob.str_to_wsgi(src_obj),
                                      headers=headers, query=query)
         if src_resp.status_int == 304:  # pylint: disable-msg=E1101
             raise PreconditionFailed()
diff --git a/test/functional/s3api/test_object.py b/test/functional/s3api/test_object.py
index f5e78b0785..f8245318ef 100644
--- a/test/functional/s3api/test_object.py
+++ b/test/functional/s3api/test_object.py
@@ -1,4 +1,5 @@
-# Copyright (c) 2015 OpenStack Foundation
+# -*- coding: utf-8 -*-
+# Copyright (c) 2015-2021 OpenStack Foundation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -25,12 +26,11 @@ import email.parser
 from email.utils import formatdate, parsedate
 from time import mktime
 import six
-from six.moves.urllib.parse import quote
 
 import test.functional as tf
 
 from swift.common.middleware.s3api.etree import fromstring
-from swift.common.utils import md5
+from swift.common.utils import md5, quote
 
 from test.functional.s3api import S3ApiBase
 from test.functional.s3api.s3_test_client import Connection
@@ -59,7 +59,7 @@ class TestS3ApiObject(S3ApiBase):
         self.assertCommonResponseHeaders(headers, etag)
 
     def test_object(self):
-        obj = 'object name with %-sign'
+        obj = u'object name with %-sign 🙂'
         content = b'abc123'
         etag = md5(content, usedforsecurity=False).hexdigest()