diff --git a/nova/tests/test_compute.py b/nova/tests/test_compute.py
index 3651f4ce..44d04a12 100644
--- a/nova/tests/test_compute.py
+++ b/nova/tests/test_compute.py
@@ -82,6 +82,21 @@ class ComputeTestCase(test.TestCase):
         inst.update(params)
         return db.instance_create(self.context, inst)['id']
 
+    def _create_instance_type(self, params={}):
+        """Create a test instance"""
+        context = self.context.elevated()
+        inst = {}
+        inst['name'] = 'm1.small'
+        inst['memory_mb'] = '1024'
+        inst['vcpus'] = '1'
+        inst['local_gb'] = '20'
+        inst['flavorid'] = '1'
+        inst['swap'] = '2048'
+        inst['rxtx_quota'] = 100
+        inst['rxtx_cap'] = 200
+        inst.update(params)
+        return db.instance_type_create(context, inst)['id']
+
     def _create_group(self):
         values = {'name': 'testgroup',
                   'description': 'testgroup',
@@ -299,15 +314,53 @@ class ComputeTestCase(test.TestCase):
         """Ensure instance can be migrated/resized"""
         instance_id = self._create_instance()
         context = self.context.elevated()
+
         self.compute.run_instance(self.context, instance_id)
         db.instance_update(self.context, instance_id, {'host': 'foo'})
-        self.compute.prep_resize(context, instance_id)
+        self.compute.prep_resize(context, instance_id, 1)
         migration_ref = db.migration_get_by_instance_and_status(context,
                 instance_id, 'pre-migrating')
         self.compute.resize_instance(context, instance_id,
                 migration_ref['id'])
         self.compute.terminate_instance(context, instance_id)
 
+    def test_resize_invalid_flavor_fails(self):
+        """Ensure invalid flavors raise"""
+        instance_id = self._create_instance()
+        context = self.context.elevated()
+        self.compute.run_instance(self.context, instance_id)
+
+        self.assertRaises(exception.NotFound, self.compute_api.resize,
+                context, instance_id, 200)
+
+        self.compute.terminate_instance(context, instance_id)
+
+    def test_resize_down_fails(self):
+        """Ensure resizing down raises and fails"""
+        context = self.context.elevated()
+        instance_id = self._create_instance()
+
+        self.compute.run_instance(self.context, instance_id)
+        db.instance_update(self.context, instance_id,
+                {'instance_type': 'm1.xlarge'})
+
+        self.assertRaises(exception.ApiError, self.compute_api.resize,
+                context, instance_id, 1)
+
+        self.compute.terminate_instance(context, instance_id)
+
+    def test_resize_same_size_fails(self):
+        """Ensure invalid flavors raise"""
+        context = self.context.elevated()
+        instance_id = self._create_instance()
+
+        self.compute.run_instance(self.context, instance_id)
+
+        self.assertRaises(exception.ApiError, self.compute_api.resize,
+                context, instance_id, 1)
+
+        self.compute.terminate_instance(context, instance_id)
+
     def test_get_by_flavor_id(self):
         type = instance_types.get_by_flavor_id(1)
         self.assertEqual(type, 'm1.tiny')
@@ -318,10 +371,8 @@ class ComputeTestCase(test.TestCase):
         instance_id = self._create_instance()
         self.compute.run_instance(self.context, instance_id)
         self.assertRaises(exception.Error, self.compute.prep_resize,
-                self.context, instance_id)
+                self.context, instance_id, 1)
         self.compute.terminate_instance(self.context, instance_id)
-        type = instance_types.get_by_flavor_id("1")
-        self.assertEqual(type, 'm1.tiny')
 
     def _setup_other_managers(self):
         self.volume_manager = utils.import_object(FLAGS.volume_manager)
diff --git a/nova/tests/test_localization.py b/nova/tests/test_localization.py
index 393d7103..a25809a7 100644
--- a/nova/tests/test_localization.py
+++ b/nova/tests/test_localization.py
@@ -21,9 +21,10 @@ import sys
 import unittest
 
 import nova
+from nova import test
 
 
-class LocalizationTestCase(unittest.TestCase):
+class LocalizationTestCase(test.TestCase):
     def test_multiple_positional_format_placeholders(self):
         pat = re.compile("\W_\(")
         single_pat = re.compile("\W%\W")
diff --git a/nova/tests/test_misc.py b/nova/tests/test_misc.py
index 1fbaf304..4e17e1ce 100644
--- a/nova/tests/test_misc.py
+++ b/nova/tests/test_misc.py
@@ -18,8 +18,12 @@ import errno
 import os
 import select
 
+from eventlet import greenpool
+from eventlet import greenthread
+
 from nova import test
-from nova.utils import parse_mailmap, str_dict_replace, synchronized
+from nova import utils
+from nova.utils import parse_mailmap, str_dict_replace
 
 
 class ProjectTestCase(test.TestCase):
@@ -63,7 +67,7 @@ class ProjectTestCase(test.TestCase):
 
 class LockTestCase(test.TestCase):
     def test_synchronized_wrapped_function_metadata(self):
-        @synchronized('whatever')
+        @utils.synchronized('whatever')
         def foo():
             """Bar"""
             pass
@@ -72,11 +76,42 @@ class LockTestCase(test.TestCase):
         self.assertEquals(foo.__name__, 'foo', "Wrapped function's name "
                                                "got mangled")
 
-    def test_synchronized(self):
+    def test_synchronized_internally(self):
+        """We can lock across multiple green threads"""
+        saved_sem_num = len(utils._semaphores)
+        seen_threads = list()
+
+        @utils.synchronized('testlock2', external=False)
+        def f(id):
+            for x in range(10):
+                seen_threads.append(id)
+                greenthread.sleep(0)
+
+        threads = []
+        pool = greenpool.GreenPool(10)
+        for i in range(10):
+            threads.append(pool.spawn(f, i))
+
+        for thread in threads:
+            thread.wait()
+
+        self.assertEquals(len(seen_threads), 100)
+        # Looking at the seen threads, split it into chunks of 10, and verify
+        # that the last 9 match the first in each chunk.
+        for i in range(10):
+            for j in range(9):
+                self.assertEquals(seen_threads[i * 10],
+                                  seen_threads[i * 10 + 1 + j])
+
+        self.assertEqual(saved_sem_num, len(utils._semaphores),
+                         "Semaphore leak detected")
+
+    def test_synchronized_externally(self):
+        """We can lock across multiple processes"""
         rpipe1, wpipe1 = os.pipe()
         rpipe2, wpipe2 = os.pipe()
 
-        @synchronized('testlock')
+        @utils.synchronized('testlock1', external=True)
         def f(rpipe, wpipe):
             try:
                 os.write(wpipe, "foo")
diff --git a/nova/tests/test_virt.py b/nova/tests/test_virt.py
index b214f5ce..6bafac39 100644
--- a/nova/tests/test_virt.py
+++ b/nova/tests/test_virt.py
@@ -77,13 +77,11 @@ class CacheConcurrencyTestCase(test.TestCase):
         eventlet.sleep(0)
         try:
             self.assertFalse(done2.ready())
-            self.assertTrue('fname' in conn._image_sems)
         finally:
             wait1.send()
         done1.wait()
         eventlet.sleep(0)
         self.assertTrue(done2.ready())
-        self.assertFalse('fname' in conn._image_sems)
 
     def test_different_fname_concurrency(self):
         """Ensures that two different fname caches are concurrent"""
diff --git a/nova/tests/xenapi/stubs.py b/nova/tests/xenapi/stubs.py
index 70d46a1f..7f9706a3 100644
--- a/nova/tests/xenapi/stubs.py
+++ b/nova/tests/xenapi/stubs.py
@@ -228,6 +228,9 @@ class FakeSessionForMigrationTests(fake.SessionBase):
     def VDI_get_by_uuid(*args):
         return 'hurr'
 
+    def VDI_resize_online(*args):
+        pass
+
     def VM_start(self, _1, ref, _2, _3):
         vm = fake.get_record('VM', ref)
         if vm['power_state'] != 'Halted':
@@ -240,7 +243,7 @@ class FakeSessionForMigrationTests(fake.SessionBase):
 
 def stub_out_migration_methods(stubs):
     def fake_get_snapshot(self, instance):
-        return 'foo', 'bar'
+        return 'vm_ref', dict(image='foo', snap='bar')
 
     @classmethod
     def fake_get_vdi(cls, session, vm_ref):
@@ -249,7 +252,7 @@ def stub_out_migration_methods(stubs):
         vdi_rec = session.get_xenapi().VDI.get_record(vdi_ref)
         return vdi_ref, {'uuid': vdi_rec['uuid'], }
 
-    def fake_shutdown(self, inst, vm, method='clean'):
+    def fake_shutdown(self, inst, vm, hard=True):
         pass
 
     @classmethod