diff --git a/tempest/api/compute/admin/test_aggregates.py b/tempest/api/compute/admin/test_aggregates.py
index a5dceca..40b005d 100644
--- a/tempest/api/compute/admin/test_aggregates.py
+++ b/tempest/api/compute/admin/test_aggregates.py
@@ -15,25 +15,13 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import fixtures
-
 from tempest.api.compute import base
+from tempest.common import tempest_fixtures as fixtures
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
-from tempest.openstack.common import lockutils
 from tempest.test import attr
 
 
-class LockFixture(fixtures.Fixture):
-    def __init__(self, name):
-        self.mgr = lockutils.lock(name, 'tempest-', True)
-
-    def setUp(self):
-        super(LockFixture, self).setUp()
-        self.addCleanup(self.mgr.__exit__, None, None, None)
-        self.mgr.__enter__()
-
-
 class AggregatesAdminTestJSON(base.BaseComputeAdminTest):
 
     """
@@ -160,7 +148,7 @@
     @attr(type='gate')
     def test_aggregate_add_remove_host(self):
         # Add an host to the given aggregate and remove.
-        self.useFixture(LockFixture('availability_zone'))
+        self.useFixture(fixtures.LockFixture('availability_zone'))
         aggregate_name = rand_name(self.aggregate_name_prefix)
         resp, aggregate = self.client.create_aggregate(aggregate_name)
         self.addCleanup(self.client.delete_aggregate, aggregate['id'])
@@ -182,7 +170,7 @@
     @attr(type='gate')
     def test_aggregate_add_host_list(self):
         # Add an host to the given aggregate and list.
-        self.useFixture(LockFixture('availability_zone'))
+        self.useFixture(fixtures.LockFixture('availability_zone'))
         aggregate_name = rand_name(self.aggregate_name_prefix)
         resp, aggregate = self.client.create_aggregate(aggregate_name)
         self.addCleanup(self.client.delete_aggregate, aggregate['id'])
@@ -200,7 +188,7 @@
     @attr(type='gate')
     def test_aggregate_add_host_get_details(self):
         # Add an host to the given aggregate and get details.
-        self.useFixture(LockFixture('availability_zone'))
+        self.useFixture(fixtures.LockFixture('availability_zone'))
         aggregate_name = rand_name(self.aggregate_name_prefix)
         resp, aggregate = self.client.create_aggregate(aggregate_name)
         self.addCleanup(self.client.delete_aggregate, aggregate['id'])
@@ -215,7 +203,7 @@
     @attr(type='gate')
     def test_aggregate_add_host_create_server_with_az(self):
         # Add an host to the given aggregate and create a server.
-        self.useFixture(LockFixture('availability_zone'))
+        self.useFixture(fixtures.LockFixture('availability_zone'))
         aggregate_name = rand_name(self.aggregate_name_prefix)
         az_name = rand_name(self.az_name_prefix)
         resp, aggregate = self.client.create_aggregate(aggregate_name, az_name)
@@ -262,7 +250,7 @@
     @attr(type=['negative', 'gate'])
     def test_aggregate_remove_host_as_user(self):
         # Regular user is not allowed to remove a host from an aggregate.
-        self.useFixture(LockFixture('availability_zone'))
+        self.useFixture(fixtures.LockFixture('availability_zone'))
         aggregate_name = rand_name(self.aggregate_name_prefix)
         resp, aggregate = self.client.create_aggregate(aggregate_name)
         self.addCleanup(self.client.delete_aggregate, aggregate['id'])
diff --git a/tempest/api/compute/admin/test_hosts.py b/tempest/api/compute/admin/test_hosts.py
index 19d7973..bf09428 100644
--- a/tempest/api/compute/admin/test_hosts.py
+++ b/tempest/api/compute/admin/test_hosts.py
@@ -15,6 +15,7 @@
 #    under the License.
 
 from tempest.api.compute import base
+from tempest.common import tempest_fixtures as fixtures
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
 from tempest.test import attr
@@ -42,6 +43,7 @@
 
     @attr(type='gate')
     def test_list_hosts_with_zone(self):
+        self.useFixture(fixtures.LockFixture('availability_zone'))
         resp, hosts = self.client.list_hosts()
         host = hosts[0]
         zone_name = host['zone']
diff --git a/tempest/api/volume/test_volumes_negative.py b/tempest/api/volume/test_volumes_negative.py
index 7eeb1ee..a48cea2 100644
--- a/tempest/api/volume/test_volumes_negative.py
+++ b/tempest/api/volume/test_volumes_negative.py
@@ -15,6 +15,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import uuid
+
 from tempest.api.volume import base
 from tempest.common.utils.data_utils import rand_name
 from tempest import exceptions
@@ -29,37 +31,24 @@
         super(VolumesNegativeTest, cls).setUpClass()
         cls.client = cls.volumes_client
 
+        # Create a test shared instance and volume for attach/detach tests
+        vol_name = rand_name('Volume-')
+
+        cls.volume = cls.create_volume(size=1, display_name=vol_name)
+        cls.client.wait_for_volume_status(cls.volume['id'], 'available')
+        cls.mountpoint = "/dev/vdc"
+
     @attr(type='gate')
     def test_volume_get_nonexistant_volume_id(self):
-        # Should not be able to get a non-existent volume
-        # Creating a non-existent volume id
-        volume_id_list = []
-        resp, volumes = self.client.list_volumes()
-        for i in range(len(volumes)):
-            volume_id_list.append(volumes[i]['id'])
-        while True:
-            non_exist_id = rand_name('999')
-            if non_exist_id not in volume_id_list:
-                break
-        # Trying to Get a non-existent volume
+        # Should not be able to get a non-existant volume
         self.assertRaises(exceptions.NotFound, self.client.get_volume,
-                          non_exist_id)
+                          str(uuid.uuid4()))
 
     @attr(type='gate')
     def test_volume_delete_nonexistant_volume_id(self):
-        # Should not be able to delete a non-existent Volume
-        # Creating non-existent volume id
-        volume_id_list = []
-        resp, volumes = self.client.list_volumes()
-        for i in range(len(volumes)):
-            volume_id_list.append(volumes[i]['id'])
-        while True:
-            non_exist_id = '12345678-abcd-4321-abcd-123456789098'
-            if non_exist_id not in volume_id_list:
-                break
-        # Try to delete a non-existent volume
+        # Should not be able to delete a non-existant Volume
         self.assertRaises(exceptions.NotFound, self.client.delete_volume,
-                          non_exist_id)
+                          str(uuid.uuid4()))
 
     @attr(type='gate')
     def test_create_volume_with_invalid_size(self):
@@ -109,6 +98,26 @@
         # Should not be able to delete volume when empty ID is passed
         self.assertRaises(exceptions.NotFound, self.client.delete_volume, '')
 
+    @attr(type=['negative', 'gate'])
+    def test_attach_volumes_with_nonexistent_volume_id(self):
+        srv_name = rand_name('Instance-')
+        resp, server = self.servers_client.create_server(srv_name,
+                                                         self.image_ref,
+                                                         self.flavor_ref)
+        self.addCleanup(self.servers_client.delete_server, server['id'])
+        self.servers_client.wait_for_server_status(server['id'], 'ACTIVE')
+        self.assertRaises(exceptions.NotFound,
+                          self.client.attach_volume,
+                          str(uuid.uuid4()),
+                          server['id'],
+                          self.mountpoint)
+
+    @attr(type=['negative', 'gate'])
+    def test_detach_volumes_with_invalid_volume_id(self):
+        self.assertRaises(exceptions.NotFound,
+                          self.client.detach_volume,
+                          'xxx')
+
 
 class VolumesNegativeTestXML(VolumesNegativeTest):
     _interface = 'xml'
diff --git a/tempest/common/tempest_fixtures.py b/tempest/common/tempest_fixtures.py
new file mode 100644
index 0000000..081b271
--- /dev/null
+++ b/tempest/common/tempest_fixtures.py
@@ -0,0 +1,30 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2013 IBM Corp.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import fixtures
+
+from tempest.openstack.common import lockutils
+
+
+class LockFixture(fixtures.Fixture):
+    def __init__(self, name):
+        self.mgr = lockutils.lock(name, 'tempest-', True)
+
+    def setUp(self):
+        super(LockFixture, self).setUp()
+        self.addCleanup(self.mgr.__exit__, None, None, None)
+        self.mgr.__enter__()
diff --git a/tempest/stress/README.rst b/tempest/stress/README.rst
index 7c180f6..ae86f6e 100644
--- a/tempest/stress/README.rst
+++ b/tempest/stress/README.rst
@@ -31,7 +31,7 @@
 
 To test installation, do the following (from the tempest/stress directory):
 
-	./run_stress.py etc/server-create-destroy-test.json -d 30
+	./run_stress.py -t etc/server-create-destroy-test.json -d 30
 
 This sample test tries to create a few VMs and kill a few VMs.
 
diff --git a/tools/install_venv_common.py b/tools/install_venv_common.py
index 0999e2c..92d66ae 100644
--- a/tools/install_venv_common.py
+++ b/tools/install_venv_common.py
@@ -119,8 +119,7 @@
         self.pip_install('setuptools')
         self.pip_install('pbr')
 
-        self.pip_install('-r', self.requirements)
-        self.pip_install('-r', self.test_requirements)
+        self.pip_install('-r', self.requirements, '-r', self.test_requirements)
 
     def post_process(self):
         self.get_distro().post_process()