diff --git a/swift/obj/diskfile.py b/swift/obj/diskfile.py
index 39eff67bde..3920315551 100644
--- a/swift/obj/diskfile.py
+++ b/swift/obj/diskfile.py
@@ -1786,8 +1786,8 @@ class ECDiskFileWriter(DiskFileWriter):
     def _finalize_durable(self, durable_file_path):
         exc = msg = None
         try:
-            with open(durable_file_path, 'w') as _fd:
-                fsync(_fd)
+            with open(durable_file_path, 'w') as _fp:
+                fsync(_fp.fileno())
                 try:
                     self.manager.hash_cleanup_listdir(self._datadir)
                 except OSError:
diff --git a/test/unit/obj/test_diskfile.py b/test/unit/obj/test_diskfile.py
index 2ccf3b1364..a84cafc8b4 100644
--- a/test/unit/obj/test_diskfile.py
+++ b/test/unit/obj/test_diskfile.py
@@ -2650,8 +2650,7 @@ class DiskFileMixin(BaseDiskFileTestMixin):
             }[policy.policy_type]
             self.assertEqual(expected, mock_fsync.call_count)
             if policy.policy_type == EC_POLICY:
-                durable_file = '%s.durable' % timestamp.internal
-                self.assertTrue(durable_file in str(mock_fsync.call_args[0]))
+                self.assertTrue(isinstance(mock_fsync.call_args[0][0], int))
 
     def test_commit_ignores_hash_cleanup_listdir_error(self):
         for policy in POLICIES: