diff --git a/cinder/tests/unit/test_volume_utils.py b/cinder/tests/unit/test_volume_utils.py
index 1ab6d73d412..56575d54852 100644
--- a/cinder/tests/unit/test_volume_utils.py
+++ b/cinder/tests/unit/test_volume_utils.py
@@ -27,6 +27,7 @@ from oslo_config import cfg
 from cinder import context
 from cinder import exception
 from cinder import test
+from cinder.tests.unit import fake_backup
 from cinder.tests.unit import fake_constants as fake
 from cinder.tests.unit import fake_snapshot
 from cinder.tests.unit import fake_volume
@@ -289,31 +290,36 @@ class NotifyUsageTestCase(test.TestCase):
 
     def test_usage_from_backup(self):
         raw_backup = {
-            'project_id': '12b0330ec2584a',
-            'user_id': '158cba1b8c2bb6008e',
+            'project_id': fake.project_id,
+            'user_id': fake.user_id,
             'availability_zone': 'nova',
-            'id': 'fake_id',
+            'id': fake.backup_id,
             'host': 'fake_host',
             'display_name': 'test_backup',
-            'created_at': '2014-12-11T10:10:00',
+            'created_at': datetime.datetime(2015, 1, 1, 1, 1, 1),
             'status': 'available',
-            'volume_id': 'fake_volume_id',
+            'volume_id': fake.volume_id,
             'size': 1,
             'service_metadata': None,
             'service': 'cinder.backup.drivers.swift',
             'fail_reason': None,
-            'parent_id': 'fake_parent_id',
+            'parent_id': fake.backup2_id,
             'num_dependent_backups': 0,
             'snapshot_id': None,
         }
 
+        ctxt = context.get_admin_context()
+        backup_obj = fake_backup.fake_backup_obj(ctxt, **raw_backup)
+
         # Make it easier to find out differences between raw and expected.
         expected_backup = raw_backup.copy()
         expected_backup['tenant_id'] = expected_backup.pop('project_id')
         expected_backup['backup_id'] = expected_backup.pop('id')
+        expected_backup['created_at'] = (
+            six.text_type(expected_backup['created_at']) + '+00:00')
 
-        usage_info = volume_utils._usage_from_backup(raw_backup)
-        self.assertEqual(expected_backup, usage_info)
+        usage_info = volume_utils._usage_from_backup(backup_obj)
+        self.assertDictMatch(expected_backup, usage_info)
 
 
 class LVMVolumeDriverTestCase(test.TestCase):
diff --git a/cinder/volume/utils.py b/cinder/volume/utils.py
index f5752c91403..5078b441d77 100644
--- a/cinder/volume/utils.py
+++ b/cinder/volume/utils.py
@@ -91,24 +91,24 @@ def _usage_from_volume(context, volume_ref, **kw):
     return usage_info
 
 
-def _usage_from_backup(backup_ref, **kw):
-    num_dependent_backups = backup_ref['num_dependent_backups']
-    usage_info = dict(tenant_id=backup_ref['project_id'],
-                      user_id=backup_ref['user_id'],
-                      availability_zone=backup_ref['availability_zone'],
-                      backup_id=backup_ref['id'],
-                      host=backup_ref['host'],
-                      display_name=backup_ref['display_name'],
-                      created_at=str(backup_ref['created_at']),
-                      status=backup_ref['status'],
-                      volume_id=backup_ref['volume_id'],
-                      size=backup_ref['size'],
-                      service_metadata=backup_ref['service_metadata'],
-                      service=backup_ref['service'],
-                      fail_reason=backup_ref['fail_reason'],
-                      parent_id=backup_ref['parent_id'],
+def _usage_from_backup(backup, **kw):
+    num_dependent_backups = backup.num_dependent_backups
+    usage_info = dict(tenant_id=backup.project_id,
+                      user_id=backup.user_id,
+                      availability_zone=backup.availability_zone,
+                      backup_id=backup.id,
+                      host=backup.host,
+                      display_name=backup.display_name,
+                      created_at=str(backup.created_at),
+                      status=backup.status,
+                      volume_id=backup.volume_id,
+                      size=backup.size,
+                      service_metadata=backup.service_metadata,
+                      service=backup.service,
+                      fail_reason=backup.fail_reason,
+                      parent_id=backup.parent_id,
                       num_dependent_backups=num_dependent_backups,
-                      snapshot_id=backup_ref['snapshot_id'],
+                      snapshot_id=backup.snapshot_id,
                       )
 
     usage_info.update(kw)