diff --git a/tempest/common/cred_client.py b/tempest/common/cred_client.py
index 37c9727..b23bc6f 100644
--- a/tempest/common/cred_client.py
+++ b/tempest/common/cred_client.py
@@ -170,6 +170,29 @@
                                                       user['id'],
                                                       role['id'])
 
+    def assign_user_role_on_domain(self, user, role_name, domain=None):
+        """Assign the specified role on a domain
+
+        :param user: a user dict
+        :param role_name: name of the role to be assigned
+        :param domain: (optional) The domain to assign the role on. If not
+                                  specified the default domain of cred_client
+        """
+        # NOTE(andreaf) This method is very specific to the v3 case, and
+        # because of that it's not defined in the parent class.
+        if domain is None:
+            domain = self.creds_domain
+        role = self._check_role_exists(role_name)
+        if not role:
+            msg = 'No "%s" role found' % role_name
+            raise lib_exc.NotFound(msg)
+        try:
+            self.roles_client.assign_user_role_on_domain(
+                domain['id'], user['id'], role['id'])
+        except lib_exc.Conflict:
+            LOG.debug("Role %s already assigned on domain %s for user %s",
+                      role['id'], domain['id'], user['id'])
+
 
 def get_creds_client(identity_client,
                      projects_client,
diff --git a/tempest/common/dynamic_creds.py b/tempest/common/dynamic_creds.py
index a63af38..e5d65f5 100644
--- a/tempest/common/dynamic_creds.py
+++ b/tempest/common/dynamic_creds.py
@@ -134,6 +134,9 @@
             self.creds_client.assign_user_role(user, project,
                                                self.admin_role)
             role_assigned = True
+            if self.identity_version == 'v3':
+                self.creds_client.assign_user_role_on_domain(
+                    user, CONF.identity.admin_role)
         # Add roles specified in config file
         for conf_role in CONF.auth.tempest_roles:
             self.creds_client.assign_user_role(user, project, conf_role)
diff --git a/tempest/lib/common/rest_client.py b/tempest/lib/common/rest_client.py
index 179db17..627143d 100644
--- a/tempest/lib/common/rest_client.py
+++ b/tempest/lib/common/rest_client.py
@@ -221,6 +221,10 @@
         :raises exceptions.InvalidHttpSuccessCode: if the read code isn't an
                                                    expected http success code
         """
+        if not isinstance(read_code, int):
+            raise TypeError("'read_code' must be an int instead of (%s)"
+                            % type(read_code))
+
         assert_msg = ("This function only allowed to use for HTTP status"
                       "codes which explicitly defined in the RFC 7231 & 4918."
                       "{0} is not a defined Success Code!"
diff --git a/tempest/lib/decorators.py b/tempest/lib/decorators.py
index e78e624..6ed99b4 100644
--- a/tempest/lib/decorators.py
+++ b/tempest/lib/decorators.py
@@ -69,12 +69,11 @@
                                "or False") % attr
 
     def __call__(self, func):
+        @functools.wraps(func)
         def _skipper(*args, **kw):
             """Wrapped skipper function."""
             testobj = args[0]
             if not getattr(testobj, self.attr, False):
                 raise testtools.TestCase.skipException(self.message)
             func(*args, **kw)
-        _skipper.__name__ = func.__name__
-        _skipper.__doc__ = func.__doc__
         return _skipper
diff --git a/tempest/tests/common/test_dynamic_creds.py b/tempest/tests/common/test_dynamic_creds.py
index 8d4f33b..f025418 100644
--- a/tempest/tests/common/test_dynamic_creds.py
+++ b/tempest/tests/common/test_dynamic_creds.py
@@ -21,15 +21,19 @@
 from tempest import config
 from tempest import exceptions
 from tempest.lib.common import rest_client
-from tempest.lib.services.identity.v2 import token_client as json_token_client
-from tempest.services.identity.v2.json import identity_client as \
-    json_iden_client
-from tempest.services.identity.v2.json import roles_client as \
-    json_roles_client
+from tempest.lib.services.identity.v2 import token_client as v2_token_client
+from tempest.lib.services.identity.v3 import token_client as v3_token_client
+from tempest.services.identity.v2.json import identity_client as v2_iden_client
+from tempest.services.identity.v2.json import roles_client as v2_roles_client
 from tempest.services.identity.v2.json import tenants_client as \
-    json_tenants_client
-from tempest.services.identity.v2.json import users_client as \
-    json_users_client
+    v2_tenants_client
+from tempest.services.identity.v2.json import users_client as v2_users_client
+from tempest.services.identity.v3.json import domains_client
+from tempest.services.identity.v3.json import identity_client as v3_iden_client
+from tempest.services.identity.v3.json import projects_client as \
+    v3_projects_client
+from tempest.services.identity.v3.json import roles_client as v3_roles_client
+from tempest.services.identity.v3.json import users_clients as v3_users_client
 from tempest.services.network.json import routers_client
 from tempest.tests import base
 from tempest.tests import fake_config
@@ -43,13 +47,24 @@
                     'identity_version': 'v2',
                     'admin_role': 'admin'}
 
+    token_client = v2_token_client
+    iden_client = v2_iden_client
+    roles_client = v2_roles_client
+    tenants_client = v2_tenants_client
+    users_client = v2_users_client
+    token_client_class = token_client.TokenClient
+    fake_response = fake_identity._fake_v2_response
+    assign_role_on_project = 'assign_user_role'
+    tenants_client_class = tenants_client.TenantsClient
+    delete_tenant = 'delete_tenant'
+
     def setUp(self):
         super(TestDynamicCredentialProvider, self).setUp()
         self.useFixture(fake_config.ConfigFixture())
         self.patchobject(config, 'TempestConfigPrivate',
                          fake_config.FakePrivate)
-        self.patchobject(json_token_client.TokenClient, 'raw_request',
-                         fake_identity._fake_v2_response)
+        self.patchobject(self.token_client_class, 'raw_request',
+                         self.fake_response)
         cfg.CONF.set_default('operator_role', 'FakeRole',
                              group='object-storage')
         self._mock_list_ec2_credentials('fake_user_id', 'fake_tenant_id')
@@ -59,7 +74,7 @@
     def test_tempest_client(self):
         creds = dynamic_creds.DynamicCredentialProvider(**self.fixed_params)
         self.assertIsInstance(creds.identity_admin_client,
-                              json_iden_client.IdentityClient)
+                              self.iden_client.IdentityClient)
 
     def _get_fake_admin_creds(self):
         return credentials.get_credentials(
@@ -70,7 +85,7 @@
 
     def _mock_user_create(self, id, name):
         user_fix = self.useFixture(mockpatch.PatchObject(
-            json_users_client.UsersClient,
+            self.users_client.UsersClient,
             'create_user',
             return_value=(rest_client.ResponseBody
                           (200, {'user': {'id': id, 'name': name}}))))
@@ -78,7 +93,7 @@
 
     def _mock_tenant_create(self, id, name):
         tenant_fix = self.useFixture(mockpatch.PatchObject(
-            json_tenants_client.TenantsClient,
+            self.tenants_client.TenantsClient,
             'create_tenant',
             return_value=(rest_client.ResponseBody
                           (200, {'tenant': {'id': id, 'name': name}}))))
@@ -86,7 +101,7 @@
 
     def _mock_list_roles(self, id, name):
         roles_fix = self.useFixture(mockpatch.PatchObject(
-            json_roles_client.RolesClient,
+            self.roles_client.RolesClient,
             'list_roles',
             return_value=(rest_client.ResponseBody
                           (200,
@@ -97,7 +112,7 @@
 
     def _mock_list_2_roles(self):
         roles_fix = self.useFixture(mockpatch.PatchObject(
-            json_roles_client.RolesClient,
+            self.roles_client.RolesClient,
             'list_roles',
             return_value=(rest_client.ResponseBody
                           (200,
@@ -108,24 +123,25 @@
 
     def _mock_assign_user_role(self):
         tenant_fix = self.useFixture(mockpatch.PatchObject(
-            json_roles_client.RolesClient,
-            'assign_user_role',
+            self.roles_client.RolesClient,
+            self.assign_role_on_project,
             return_value=(rest_client.ResponseBody
                           (200, {}))))
         return tenant_fix
 
     def _mock_list_role(self):
         roles_fix = self.useFixture(mockpatch.PatchObject(
-            json_roles_client.RolesClient,
+            self.roles_client.RolesClient,
             'list_roles',
             return_value=(rest_client.ResponseBody
-                          (200, {'roles': [{'id': '1',
-                                 'name': 'FakeRole'}]}))))
+                          (200, {'roles': [
+                              {'id': '1', 'name': 'FakeRole'},
+                              {'id': '2', 'name': 'Member'}]}))))
         return roles_fix
 
     def _mock_list_ec2_credentials(self, user_id, tenant_id):
         ec2_creds_fix = self.useFixture(mockpatch.PatchObject(
-            json_users_client.UsersClient,
+            self.users_client.UsersClient,
             'list_user_ec2_credentials',
             return_value=(rest_client.ResponseBody
                           (200, {'credentials': [{
@@ -180,12 +196,12 @@
         self._mock_user_create('1234', 'fake_admin_user')
         self._mock_tenant_create('1234', 'fake_admin_tenant')
 
-        user_mock = mock.patch.object(json_roles_client.RolesClient,
-                                      'assign_user_role')
+        user_mock = mock.patch.object(self.roles_client.RolesClient,
+                                      self.assign_role_on_project)
         user_mock.start()
         self.addCleanup(user_mock.stop)
-        with mock.patch.object(json_roles_client.RolesClient,
-                               'assign_user_role') as user_mock:
+        with mock.patch.object(self.roles_client.RolesClient,
+                               self.assign_role_on_project) as user_mock:
             admin_creds = creds.get_admin_creds()
         user_mock.assert_has_calls([
             mock.call('1234', '1234', '1234')])
@@ -203,12 +219,12 @@
         self._mock_user_create('1234', 'fake_role_user')
         self._mock_tenant_create('1234', 'fake_role_tenant')
 
-        user_mock = mock.patch.object(json_roles_client.RolesClient,
-                                      'assign_user_role')
+        user_mock = mock.patch.object(self.roles_client.RolesClient,
+                                      self.assign_role_on_project)
         user_mock.start()
         self.addCleanup(user_mock.stop)
-        with mock.patch.object(json_roles_client.RolesClient,
-                               'assign_user_role') as user_mock:
+        with mock.patch.object(self.roles_client.RolesClient,
+                               self.assign_role_on_project) as user_mock:
             role_creds = creds.get_creds_by_roles(
                 roles=['role1', 'role2'])
         calls = user_mock.mock_calls
@@ -240,12 +256,10 @@
         self._mock_user_create('123456', 'fake_admin_user')
         self._mock_list_roles('123456', 'admin')
         creds.get_admin_creds()
-        user_mock = self.patch(
-            'tempest.services.identity.v2.json.users_client.'
-            'UsersClient.delete_user')
-        tenant_mock = self.patch(
-            'tempest.services.identity.v2.json.tenants_client.'
-            'TenantsClient.delete_tenant')
+        user_mock = self.patchobject(self.users_client.UsersClient,
+                                     'delete_user')
+        tenant_mock = self.patchobject(self.tenants_client_class,
+                                       self.delete_tenant)
         creds.clear_creds()
         # Verify user delete calls
         calls = user_mock.mock_calls
@@ -374,18 +388,13 @@
         self._mock_router_create('123456', 'fake_admin_router')
         self._mock_list_roles('123456', 'admin')
         creds.get_admin_creds()
-        self.patch('tempest.services.identity.v2.json.users_client.'
-                   'UsersClient.delete_user')
-        self.patch('tempest.services.identity.v2.json.tenants_client.'
-                   'TenantsClient.delete_tenant')
-        net = mock.patch.object(creds.networks_admin_client,
-                                'delete_network')
+        self.patchobject(self.users_client.UsersClient, 'delete_user')
+        self.patchobject(self.tenants_client_class, self.delete_tenant)
+        net = mock.patch.object(creds.networks_admin_client, 'delete_network')
         net_mock = net.start()
-        subnet = mock.patch.object(creds.subnets_admin_client,
-                                   'delete_subnet')
+        subnet = mock.patch.object(creds.subnets_admin_client, 'delete_subnet')
         subnet_mock = subnet.start()
-        router = mock.patch.object(creds.routers_admin_client,
-                                   'delete_router')
+        router = mock.patch.object(creds.routers_admin_client, 'delete_router')
         router_mock = router.start()
         remove_router_interface_mock = self.patch(
             'tempest.services.network.json.routers_client.RoutersClient.'
@@ -587,3 +596,42 @@
         self._mock_tenant_create('1234', 'fake_prim_tenant')
         self.assertRaises(exceptions.InvalidConfiguration,
                           creds.get_primary_creds)
+
+
+class TestDynamicCredentialProviderV3(TestDynamicCredentialProvider):
+
+    fixed_params = {'name': 'test class',
+                    'identity_version': 'v3',
+                    'admin_role': 'admin'}
+
+    token_client = v3_token_client
+    iden_client = v3_iden_client
+    roles_client = v3_roles_client
+    tenants_client = v3_projects_client
+    users_client = v3_users_client
+    token_client_class = token_client.V3TokenClient
+    fake_response = fake_identity._fake_v3_response
+    assign_role_on_project = 'assign_user_role_on_project'
+    tenants_client_class = tenants_client.ProjectsClient
+    delete_tenant = 'delete_project'
+
+    def setUp(self):
+        super(TestDynamicCredentialProviderV3, self).setUp()
+        self.useFixture(fake_config.ConfigFixture())
+        self.useFixture(mockpatch.PatchObject(
+            domains_client.DomainsClient, 'list_domains',
+            return_value=dict(domains=[dict(id='default',
+                                            name='Default')])))
+        self.patchobject(self.roles_client.RolesClient,
+                         'assign_user_role_on_domain')
+
+    def _mock_list_ec2_credentials(self, user_id, tenant_id):
+        pass
+
+    def _mock_tenant_create(self, id, name):
+        project_fix = self.useFixture(mockpatch.PatchObject(
+            self.tenants_client.ProjectsClient,
+            'create_project',
+            return_value=(rest_client.ResponseBody
+                          (200, {'project': {'id': id, 'name': name}}))))
+        return project_fix
diff --git a/tempest/tests/lib/test_rest_client.py b/tempest/tests/lib/test_rest_client.py
index 2a6fad5..106a1e5 100644
--- a/tempest/tests/lib/test_rest_client.py
+++ b/tempest/tests/lib/test_rest_client.py
@@ -693,6 +693,24 @@
         self.assertRaises(AssertionError, self.rest_client.expected_success,
                           expected_code, read_code)
 
+    def test_non_success_read_code_as_string(self):
+        expected_code = 202
+        read_code = '202'
+        self.assertRaises(TypeError, self.rest_client.expected_success,
+                          expected_code, read_code)
+
+    def test_non_success_read_code_as_list(self):
+        expected_code = 202
+        read_code = [202]
+        self.assertRaises(TypeError, self.rest_client.expected_success,
+                          expected_code, read_code)
+
+    def test_non_success_expected_code_as_non_int(self):
+        expected_code = ['201', 202]
+        read_code = 202
+        self.assertRaises(AssertionError, self.rest_client.expected_success,
+                          expected_code, read_code)
+
 
 class TestResponseBody(base.TestCase):