diff --git a/nova/tests/unit/api/openstack/compute/test_hosts.py b/nova/tests/unit/api/openstack/compute/test_hosts.py
index 902a473cd8c6..308202e8b1d9 100644
--- a/nova/tests/unit/api/openstack/compute/test_hosts.py
+++ b/nova/tests/unit/api/openstack/compute/test_hosts.py
@@ -378,7 +378,7 @@ class HostTestCaseV21(test.TestCase):
         s_ref = self._create_compute_service()
         with mock.patch.object(self.controller.api,
                                'instance_get_all_by_host') as m:
-            m.side_effect = exception.HostMappingNotFound
+            m.side_effect = exception.HostMappingNotFound(name='something')
             self.assertRaises(webob.exc.HTTPNotFound,
                               self.controller.show, self.req, s_ref['host'])
 
diff --git a/nova/tests/unit/api/openstack/compute/test_hypervisors.py b/nova/tests/unit/api/openstack/compute/test_hypervisors.py
index 04304cd49e43..29e7303d12d5 100644
--- a/nova/tests/unit/api/openstack/compute/test_hypervisors.py
+++ b/nova/tests/unit/api/openstack/compute/test_hypervisors.py
@@ -639,7 +639,7 @@ class HypervisorsTestV21(test.NoDBTestCase):
         req = self._get_request(True)
         with mock.patch.object(self.controller.host_api,
                                'instance_get_all_by_host') as m:
-            m.side_effect = exception.HostMappingNotFound
+            m.side_effect = exception.HostMappingNotFound(name='something')
             self.assertRaises(exc.HTTPNotFound,
                               self.controller.servers, req, 'hyper')
 
diff --git a/nova/tests/unit/api/openstack/compute/test_services.py b/nova/tests/unit/api/openstack/compute/test_services.py
index 0be82436a5c6..41ea739f1c25 100644
--- a/nova/tests/unit/api/openstack/compute/test_services.py
+++ b/nova/tests/unit/api/openstack/compute/test_services.py
@@ -494,7 +494,7 @@ class ServicesTestV21(test.TestCase):
         body = {'host': 'invalid', 'binary': 'nova-compute'}
         with mock.patch.object(self.controller.host_api,
                                'service_update') as m:
-            m.side_effect = exception.HostMappingNotFound
+            m.side_effect = exception.HostMappingNotFound(name='something')
             self.assertRaises(webob.exc.HTTPNotFound,
                               self.controller.update,
                               self.req,
diff --git a/nova/tests/unit/compute/test_compute.py b/nova/tests/unit/compute/test_compute.py
index e0eed5d061ed..e95f38d4eff8 100644
--- a/nova/tests/unit/compute/test_compute.py
+++ b/nova/tests/unit/compute/test_compute.py
@@ -1302,7 +1302,7 @@ class ComputeVolumeTestCase(BaseTestCase):
                 self.instance_object, 'fake_id', 'fake_id2', {})
 
     @mock.patch.object(cinder.API, 'create',
-                       side_effect=exception.OverQuota())
+                       side_effect=exception.OverQuota(overs='something'))
     def test_prep_block_device_over_quota_failure(self, mock_create):
         instance = self._create_fake_instance_obj()
         bdms = [
diff --git a/nova/tests/unit/compute/test_compute_mgr.py b/nova/tests/unit/compute/test_compute_mgr.py
index c0e9f27a53ce..47b30891e35d 100644
--- a/nova/tests/unit/compute/test_compute_mgr.py
+++ b/nova/tests/unit/compute/test_compute_mgr.py
@@ -4151,7 +4151,8 @@ class ComputeManagerBuildInstanceTestCase(test.NoDBTestCase):
 
     def test_build_and_run_volume_encryption_not_supported(self):
         self._test_build_and_run_spawn_exceptions(
-            exception.VolumeEncryptionNotSupported(reason=""))
+            exception.VolumeEncryptionNotSupported(volume_type='something',
+                                                   volume_id='something'))
 
     def test_build_and_run_invalid_input(self):
         self._test_build_and_run_spawn_exceptions(
diff --git a/nova/tests/unit/conductor/test_conductor.py b/nova/tests/unit/conductor/test_conductor.py
index 6716a7997420..cc550934fad8 100644
--- a/nova/tests/unit/conductor/test_conductor.py
+++ b/nova/tests/unit/conductor/test_conductor.py
@@ -2442,7 +2442,7 @@ class ConductorTaskRPCAPITestCase(_BaseTaskTestCase,
         def test(self, context, instance):
             return mock.sentinel.iransofaraway
 
-        mock_im.side_effect = exc.InstanceMappingNotFound
+        mock_im.side_effect = exc.InstanceMappingNotFound(uuid='something')
         ctxt = mock.MagicMock()
         inst = mock.MagicMock()
         self.assertEqual(mock.sentinel.iransofaraway,
diff --git a/nova/tests/unit/virt/libvirt/test_driver.py b/nova/tests/unit/virt/libvirt/test_driver.py
index 2e7df3d66da0..5dffc856850e 100644
--- a/nova/tests/unit/virt/libvirt/test_driver.py
+++ b/nova/tests/unit/virt/libvirt/test_driver.py
@@ -5959,10 +5959,11 @@ class LibvirtConnTestCase(test.NoDBTestCase):
         drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), False)
         self.assertTrue(drvr.instance_exists(None))
 
-        mock_get_guest.side_effect = exception.InstanceNotFound
+        mock_get_guest.side_effect = exception.InstanceNotFound(
+            instance_id='something')
         self.assertFalse(drvr.instance_exists(None))
 
-        mock_get_guest.side_effect = exception.InternalError
+        mock_get_guest.side_effect = exception.InternalError(err='something')
         self.assertFalse(drvr.instance_exists(None))
 
     def test_estimate_instance_overhead_spawn(self):
diff --git a/nova/tests/unit/virt/powervm/test_driver.py b/nova/tests/unit/virt/powervm/test_driver.py
index f8f9b44990fb..258eab1ecf7f 100644
--- a/nova/tests/unit/virt/powervm/test_driver.py
+++ b/nova/tests/unit/virt/powervm/test_driver.py
@@ -120,7 +120,8 @@ class TestPowerVMDriver(test.NoDBTestCase):
         mock_del.reset_mock()
 
         # InstanceNotFound exception, non-forced
-        mock_pwroff.side_effect = exception.InstanceNotFound
+        mock_pwroff.side_effect = exception.InstanceNotFound(
+            instance_id='something')
         self.drv.destroy('context', self.inst, [], block_device_info={},
                          destroy_disks=False)
         mock_pwroff.assert_called_once_with(