diff --git a/etc/tempest.conf.sample b/etc/tempest.conf.sample
index 990cb37..fe4959b 100644
--- a/etc/tempest.conf.sample
+++ b/etc/tempest.conf.sample
@@ -398,8 +398,7 @@
 #uri_v3=<None>
 
 # Identity API version to be used for authentication for API
-# tests. Planned to extend to tenant isolation, scenario tests
-# and CLI tests. (string value)
+# tests. (string value)
 #auth_version=v2
 
 # The identity region name to use. Also used as the other
diff --git a/tempest/api/data_processing/test_plugins.py b/tempest/api/data_processing/test_plugins.py
new file mode 100644
index 0000000..3b941d8
--- /dev/null
+++ b/tempest/api/data_processing/test_plugins.py
@@ -0,0 +1,58 @@
+# Copyright (c) 2013 Mirantis Inc.
+#
+# 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.
+
+from tempest.api.data_processing import base as dp_base
+from tempest.test import attr
+
+
+class PluginsTest(dp_base.BaseDataProcessingTest):
+    def _list_all_plugin_names(self):
+        """Returns all enabled plugin names.
+
+        It ensures response status and main plugins availability.
+        """
+        resp, plugins = self.client.list_plugins()
+
+        self.assertEqual(200, resp.status)
+
+        plugins_names = list([plugin['name'] for plugin in plugins])
+        self.assertIn('vanilla', plugins_names)
+        self.assertIn('hdp', plugins_names)
+
+        return plugins_names
+
+    @attr(type='smoke')
+    def test_plugin_list(self):
+        self._list_all_plugin_names()
+
+    @attr(type='smoke')
+    def test_plugin_get(self):
+        for plugin_name in self._list_all_plugin_names():
+            resp, plugin = self.client.get_plugin(plugin_name)
+
+            self.assertEqual(200, resp.status)
+            self.assertEqual(plugin_name, plugin['name'])
+
+            for plugin_version in plugin['versions']:
+                resp, detailed_plugin = self.client.get_plugin(plugin_name,
+                                                               plugin_version)
+
+                self.assertEqual(200, resp.status)
+                self.assertEqual(plugin_name, detailed_plugin['name'])
+
+                # check that required image tags contains name and version
+                image_tags = detailed_plugin['required_image_tags']
+                self.assertIn(plugin_name, image_tags)
+                self.assertIn(plugin_version, image_tags)
diff --git a/tempest/api/identity/admin/test_users_negative.py b/tempest/api/identity/admin/test_users_negative.py
index e9e7818..060f24a 100644
--- a/tempest/api/identity/admin/test_users_negative.py
+++ b/tempest/api/identity/admin/test_users_negative.py
@@ -207,7 +207,7 @@
     @attr(type=['negative', 'gate'])
     def test_get_users_request_without_token(self):
         # Request to get list of users without a valid token should fail
-        token = self.client.auth_provider.auth_data[0]
+        token = self.client.auth_provider.get_token()
         self.client.delete_token(token)
         self.assertRaises(exceptions.Unauthorized, self.client.get_users)
         self.client.auth_provider.clear_auth()
diff --git a/tempest/api/volume/admin/test_multi_backend.py b/tempest/api/volume/admin/test_multi_backend.py
index cb1a6cb..b0c878b 100644
--- a/tempest/api/volume/admin/test_multi_backend.py
+++ b/tempest/api/volume/admin/test_multi_backend.py
@@ -14,8 +14,6 @@
 from tempest.common.utils import data_utils
 from tempest import config
 from tempest.openstack.common import log as logging
-from tempest.services.volume.json.admin import volume_types_client
-from tempest.services.volume.json import volumes_client
 from tempest.test import attr
 
 CONF = config.CONF
@@ -36,20 +34,7 @@
         cls.backend1_name = CONF.volume.backend1_name
         cls.backend2_name = CONF.volume.backend2_name
 
-        adm_user = CONF.identity.admin_username
-        adm_pass = CONF.identity.admin_password
-        adm_tenant = CONF.identity.admin_tenant_name
-        auth_url = CONF.identity.uri
-
-        cls.volume_client = volumes_client.VolumesClientJSON(adm_user,
-                                                             adm_pass,
-                                                             auth_url,
-                                                             adm_tenant)
-        cls.type_client = volume_types_client.VolumeTypesClientJSON(adm_user,
-                                                                    adm_pass,
-                                                                    auth_url,
-                                                                    adm_tenant)
-
+        cls.volume_client = cls.os_adm.volumes_client
         cls.volume_type_id_list = []
         cls.volume_id_list = []
         try:
@@ -57,7 +42,7 @@
             type1_name = data_utils.rand_name('Type-')
             vol1_name = data_utils.rand_name('Volume-')
             extra_specs1 = {"volume_backend_name": cls.backend1_name}
-            resp, cls.type1 = cls.type_client.create_volume_type(
+            resp, cls.type1 = cls.client.create_volume_type(
                 type1_name, extra_specs=extra_specs1)
             cls.volume_type_id_list.append(cls.type1['id'])
 
@@ -72,7 +57,7 @@
                 type2_name = data_utils.rand_name('Type-')
                 vol2_name = data_utils.rand_name('Volume-')
                 extra_specs2 = {"volume_backend_name": cls.backend2_name}
-                resp, cls.type2 = cls.type_client.create_volume_type(
+                resp, cls.type2 = cls.client.create_volume_type(
                     type2_name, extra_specs=extra_specs2)
                 cls.volume_type_id_list.append(cls.type2['id'])
 
@@ -97,7 +82,7 @@
         # volume types deletion
         volume_type_id_list = getattr(cls, 'volume_type_id_list', [])
         for volume_type_id in volume_type_id_list:
-            cls.type_client.delete_volume_type(volume_type_id)
+            cls.client.delete_volume_type(volume_type_id)
 
         super(VolumeMultiBackendTest, cls).tearDownClass()
 
diff --git a/tempest/common/rest_client.py b/tempest/common/rest_client.py
index 8a85602..033fe70 100644
--- a/tempest/common/rest_client.py
+++ b/tempest/common/rest_client.py
@@ -108,6 +108,10 @@
         return self.auth_provider.base_url(filters=self.filters)
 
     @property
+    def token(self):
+        return self.auth_provider.get_token()
+
+    @property
     def filters(self):
         _filters = dict(
             service=self.service,
diff --git a/tempest/config.py b/tempest/config.py
index 1233389..d24ab34 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -46,8 +46,7 @@
     cfg.StrOpt('auth_version',
                default='v2',
                help="Identity API version to be used for authentication "
-                    "for API tests. Planned to extend to tenant isolation, "
-                    "scenario tests and CLI tests."),
+                    "for API tests."),
     cfg.StrOpt('region',
                default='RegionOne',
                help="The identity region name to use. Also used as the other "
diff --git a/tempest/services/data_processing/v1_1/client.py b/tempest/services/data_processing/v1_1/client.py
index db21201..e96b44b 100644
--- a/tempest/services/data_processing/v1_1/client.py
+++ b/tempest/services/data_processing/v1_1/client.py
@@ -77,3 +77,17 @@
 
         uri = "node-group-templates/%s" % tmpl_id
         return self.delete(uri)
+
+    def list_plugins(self):
+        """List all enabled plugins."""
+
+        uri = 'plugins'
+        return self._request_and_parse(self.get, uri, 'plugins')
+
+    def get_plugin(self, plugin_name, plugin_version=None):
+        """Returns the details of a single plugin."""
+
+        uri = "plugins/%s" % plugin_name
+        if plugin_version:
+            uri += '/%s' % plugin_version
+        return self._request_and_parse(self.get, uri, 'plugin')
diff --git a/tempest/services/object_storage/account_client.py b/tempest/services/object_storage/account_client.py
index 924d9a8..e9208b7 100644
--- a/tempest/services/object_storage/account_client.py
+++ b/tempest/services/object_storage/account_client.py
@@ -30,10 +30,6 @@
         self.service = CONF.object_storage.catalog_type
         self.format = 'json'
 
-    @property
-    def token(self):
-        return self.auth_provider.auth_data[0]
-
     def create_account(self, data=None,
                        params=None,
                        metadata={},
diff --git a/tempest/services/object_storage/container_client.py b/tempest/services/object_storage/container_client.py
index 63a6460..95b428b 100644
--- a/tempest/services/object_storage/container_client.py
+++ b/tempest/services/object_storage/container_client.py
@@ -32,10 +32,6 @@
         self.service = CONF.object_storage.catalog_type
         self.format = 'json'
 
-    @property
-    def token(self):
-        return self.auth_provider.auth_data[0]
-
     def create_container(
             self, container_name,
             metadata=None,
diff --git a/tempest/tests/negative/__init__.py b/tempest/tests/negative/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tempest/tests/negative/__init__.py
diff --git a/tempest/tests/negative/test_generate_json.py b/tempest/tests/negative/test_generate_json.py
new file mode 100644
index 0000000..a0aa088
--- /dev/null
+++ b/tempest/tests/negative/test_generate_json.py
@@ -0,0 +1,53 @@
+# Copyright 2014 Deutsche Telekom AG
+# 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.
+
+from tempest.common import generate_json as gen
+import tempest.test
+
+
+class TestGenerateJson(tempest.test.BaseTestCase):
+
+    fake_input_str = {"type": "string",
+                      "minLength": 2,
+                      "maxLength": 8,
+                      'results': {'gen_number': 404}}
+
+    fake_input_int = {"type": "integer",
+                      "maximum": 255,
+                      "minimum": 1}
+
+    fake_input_obj = {"type": "object",
+                      "properties": {"minRam": {"type": "integer"},
+                                     "diskName": {"type": "string"},
+                                     "maxRam": {"type": "integer", }
+                                     }
+                      }
+
+    def _validate_result(self, data):
+        self.assertTrue(isinstance(data, list))
+        for t in data:
+            self.assertTrue(isinstance(t, tuple))
+
+    def test_generate_invalid_string(self):
+        result = gen.generate_invalid(self.fake_input_str)
+        self._validate_result(result)
+
+    def test_generate_invalid_integer(self):
+        result = gen.generate_invalid(self.fake_input_int)
+        self._validate_result(result)
+
+    def test_generate_invalid_obj(self):
+        result = gen.generate_invalid(self.fake_input_obj)
+        self._validate_result(result)
diff --git a/tempest/tests/negative/test_negative_auto_test.py b/tempest/tests/negative/test_negative_auto_test.py
new file mode 100644
index 0000000..4c59383
--- /dev/null
+++ b/tempest/tests/negative/test_negative_auto_test.py
@@ -0,0 +1,64 @@
+# Copyright 2014 Deutsche Telekom AG
+# 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 mock
+
+import tempest.test as test
+
+
+class TestNegativeAutoTest(test.BaseTestCase):
+    # Fake entries
+    _interface = 'json'
+    _service = 'compute'
+
+    fake_input_desc = {"name": "list-flavors-with-detail",
+                       "http-method": "GET",
+                       "url": "flavors/detail",
+                       "json-schema": {"type": "object",
+                                      "properties":
+                                      {"minRam": {"type": "integer"},
+                                       "minDisk": {"type": "integer"}}
+                                       },
+                       "resources": ["flavor", "volume", "image"]
+                       }
+
+    def _check_prop_entries(self, result, entry):
+        entries = [a for a in result if entry in a[0]]
+        self.assertIsNotNone(entries)
+        self.assertIs(len(entries), 2)
+        for entry in entries:
+            self.assertIsNotNone(entry[1]['schema'])
+
+    def _check_resource_entries(self, result, entry):
+        entries = [a for a in result if entry in a[0]]
+        self.assertIsNotNone(entries)
+        self.assertIs(len(entries), 3)
+        for entry in entries:
+            self.assertIsNotNone(entry[1]['resource'])
+
+    @mock.patch('tempest.test.NegativeAutoTest.load_schema')
+    def test_generate_scenario(self, open_mock):
+        open_mock.return_value = self.fake_input_desc
+        scenarios = test.NegativeAutoTest.\
+            generate_scenario(None)
+
+        self.assertIsInstance(scenarios, list)
+        for scenario in scenarios:
+            self.assertIsInstance(scenario, tuple)
+            self.assertIsInstance(scenario[0], str)
+            self.assertIsInstance(scenario[1], dict)
+        self._check_prop_entries(scenarios, "prop_minRam")
+        self._check_prop_entries(scenarios, "prop_minDisk")
+        self._check_resource_entries(scenarios, "inv_res")
diff --git a/tox.ini b/tox.ini
index 88f2537..860c8ae 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,9 +6,6 @@
 [testenv]
 sitepackages = True
 setenv = VIRTUAL_ENV={envdir}
-         LANG=en_US.UTF-8
-         LANGUAGE=en_US:en
-         LC_ALL=C
          OS_TEST_PATH=./tempest/test_discover
 usedevelop = True
 install_command = pip install {opts} {packages}