diff --git a/nova/compute/api.py b/nova/compute/api.py
index 205f596673..dcc6a7f06c 100644
--- a/nova/compute/api.py
+++ b/nova/compute/api.py
@@ -1499,7 +1499,7 @@ class API(base.Base):
 
         request_spec = {
                 'instance_type': new_instance_type,
-                'instance_uuids': instance['uuid'],
+                'instance_uuids': [instance['uuid']],
                 'instance_properties': instance}
 
         filter_properties = {'ignore_hosts': []}
diff --git a/nova/tests/compute/test_compute.py b/nova/tests/compute/test_compute.py
index c28d2bd2f9..822c23e039 100644
--- a/nova/tests/compute/test_compute.py
+++ b/nova/tests/compute/test_compute.py
@@ -3331,6 +3331,12 @@ class ComputeAPITestCase(BaseTestCase):
             request_spec = msg['args']['request_spec']
             filter_properties = msg['args']['filter_properties']
             instance_properties = request_spec['instance_properties']
+            # resize with flavor_id = None will still send instance_type
+            self.assertEqual(request_spec['instance_type'],
+                             orig_instance_type)
+            self.assertEqual(request_spec['instance_uuids'],
+                             [instance['uuid']])
+            self.assertEqual(instance_properties['uuid'], instance['uuid'])
             self.assertEqual(instance_properties['host'], 'host2')
             # Ensure the instance passed to us has been updated with
             # progress set to 0 and task_state set to RESIZE_PREP.
@@ -3345,6 +3351,7 @@ class ComputeAPITestCase(BaseTestCase):
         instance = self._create_fake_instance(dict(host='host2'))
         instance = db.instance_get_by_uuid(context, instance['uuid'])
         instance = jsonutils.to_primitive(instance)
+        orig_instance_type = instance['instance_type']
         self.compute.run_instance(self.context, instance=instance)
         # We need to set the host to something 'known'.  Unfortunately,
         # the compute manager is using a cached copy of FLAGS.host,
diff --git a/nova/tests/scheduler/test_scheduler.py b/nova/tests/scheduler/test_scheduler.py
index bbb63ab516..d5e86fe1bd 100644
--- a/nova/tests/scheduler/test_scheduler.py
+++ b/nova/tests/scheduler/test_scheduler.py
@@ -241,8 +241,9 @@ class SchedulerManagerTestCase(test.TestCase):
 
         self.mox.StubOutWithMock(db, 'instance_update_and_get_original')
 
-        request_spec = {'instance_properties':
-                {'uuid': fake_instance_uuid}}
+        request_spec = {'instance_type': 'fake_type',
+                        'instance_uuids': [fake_instance_uuid],
+                        'instance_properties': {'uuid': fake_instance_uuid}}
         kwargs = {
                 'context': self.context,
                 'image': 'fake_image',