diff --git a/doc/source/library.rst b/doc/source/library.rst
index 24ead08..8b263f2 100644
--- a/doc/source/library.rst
+++ b/doc/source/library.rst
@@ -1,6 +1,6 @@
 .. _library:
 
-Tempest Library Doucmentation
+Tempest Library Documentation
 =============================
 
 Tempest provides a stable library interface that provides external tools or
diff --git a/tempest/api/compute/admin/test_live_migration.py b/tempest/api/compute/admin/test_live_migration.py
index b1c42a6..ead6db3 100644
--- a/tempest/api/compute/admin/test_live_migration.py
+++ b/tempest/api/compute/admin/test_live_migration.py
@@ -63,7 +63,7 @@
     def _get_host_for_server(self, server_id):
         return self._get_server_details(server_id)[self._host_key]
 
-    def _migrate_server_to(self, server_id, dest_host, volume_backed):
+    def _migrate_server_to(self, server_id, dest_host, volume_backed=False):
         block_migration = (CONF.compute_feature_enabled.
                            block_migration_for_live_migration and
                            not volume_backed)
diff --git a/tempest/api/identity/admin/v3/test_inherits.py b/tempest/api/identity/admin/v3/test_inherits.py
new file mode 100644
index 0000000..fe20349
--- /dev/null
+++ b/tempest/api/identity/admin/v3/test_inherits.py
@@ -0,0 +1,147 @@
+#    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.identity import base
+from tempest.common.utils import data_utils
+from tempest import config
+from tempest import test
+
+CONF = config.CONF
+
+
+class BaseInheritsV3Test(base.BaseIdentityV3AdminTest):
+
+    @classmethod
+    def skip_checks(cls):
+        super(BaseInheritsV3Test, cls).skip_checks()
+        if not test.is_extension_enabled('OS-INHERIT', 'identity'):
+            raise cls.skipException("Inherits aren't enabled")
+
+    @classmethod
+    def resource_setup(cls):
+        super(BaseInheritsV3Test, cls).resource_setup()
+        u_name = data_utils.rand_name('user-')
+        u_desc = '%s description' % u_name
+        u_email = '%s@testmail.tm' % u_name
+        u_password = data_utils.rand_name('pass-')
+        cls.domain = cls.domains_client.create_domain(
+            data_utils.rand_name('domain-'),
+            description=data_utils.rand_name('domain-desc-'))['domain']
+        cls.project = cls.projects_client.create_project(
+            data_utils.rand_name('project-'),
+            description=data_utils.rand_name('project-desc-'),
+            domain_id=cls.domain['id'])['project']
+        cls.group = cls.groups_client.create_group(
+            name=data_utils.rand_name('group-'), project_id=cls.project['id'],
+            domain_id=cls.domain['id'])['group']
+        cls.user = cls.users_client.create_user(
+            u_name, description=u_desc, password=u_password,
+            email=u_email, project_id=cls.project['id'],
+            domain_id=cls.domain['id'])['user']
+
+    @classmethod
+    def resource_cleanup(cls):
+        cls.groups_client.delete_group(cls.group['id'])
+        cls.users_client.delete_user(cls.user['id'])
+        cls.projects_client.delete_project(cls.project['id'])
+        cls.domains_client.update_domain(cls.domain['id'], enabled=False)
+        cls.domains_client.delete_domain(cls.domain['id'])
+        super(BaseInheritsV3Test, cls).resource_cleanup()
+
+    def _list_assertions(self, body, fetched_role_ids, role_id):
+        self.assertEqual(len(body), 1)
+        self.assertIn(role_id, fetched_role_ids)
+
+
+class InheritsV3TestJSON(BaseInheritsV3Test):
+
+    @test.idempotent_id('4e6f0366-97c8-423c-b2be-41eae6ac91c8')
+    def test_inherit_assign_list_check_revoke_roles_on_domains_user(self):
+        # Create role
+        src_role = self.roles_client.create_role(
+            name=data_utils.rand_name('Role'))['role']
+        self.addCleanup(self.roles_client.delete_role, src_role['id'])
+        # Assign role on domains user
+        self.roles_client.assign_inherited_role_on_domains_user(
+            self.domain['id'], self.user['id'], src_role['id'])
+        # list role on domains user
+        roles = self.roles_client.\
+            list_inherited_project_role_for_user_on_domain(
+                self.domain['id'], self.user['id'])['roles']
+
+        fetched_role_ids = [i['id'] for i in roles]
+        self._list_assertions(roles, fetched_role_ids,
+                              src_role['id'])
+
+        # Check role on domains user
+        self.roles_client.check_user_inherited_project_role_on_domain(
+            self.domain['id'], self.user['id'], src_role['id'])
+        # Revoke role from domains user.
+        self.roles_client.revoke_inherited_role_from_user_on_domain(
+            self.domain['id'], self.user['id'], src_role['id'])
+
+    @test.idempotent_id('c7a8dda2-be50-4fb4-9a9c-e830771078b1')
+    def test_inherit_assign_list_check_revoke_roles_on_domains_group(self):
+        # Create role
+        src_role = self.roles_client.create_role(
+            name=data_utils.rand_name('Role'))['role']
+        self.addCleanup(self.roles_client.delete_role, src_role['id'])
+        # Assign role on domains group
+        self.roles_client.assign_inherited_role_on_domains_group(
+            self.domain['id'], self.group['id'], src_role['id'])
+        # List role on domains group
+        roles = self.roles_client.\
+            list_inherited_project_role_for_group_on_domain(
+                self.domain['id'], self.group['id'])['roles']
+
+        fetched_role_ids = [i['id'] for i in roles]
+        self._list_assertions(roles, fetched_role_ids,
+                              src_role['id'])
+
+        # Check role on domains group
+        self.roles_client.check_group_inherited_project_role_on_domain(
+            self.domain['id'], self.group['id'], src_role['id'])
+        # Revoke role from domains group
+        self.roles_client.revoke_inherited_role_from_group_on_domain(
+            self.domain['id'], self.group['id'], src_role['id'])
+
+    @test.idempotent_id('18b70e45-7687-4b72-8277-b8f1a47d7591')
+    def test_inherit_assign_check_revoke_roles_on_projects_user(self):
+        # Create role
+        src_role = self.roles_client.create_role(
+            name=data_utils.rand_name('Role'))['role']
+        self.addCleanup(self.roles_client.delete_role, src_role['id'])
+        # Assign role on projects user
+        self.roles_client.assign_inherited_role_on_projects_user(
+            self.project['id'], self.user['id'], src_role['id'])
+        # Check role on projects user
+        self.roles_client.check_user_has_flag_on_inherited_to_project(
+            self.project['id'], self.user['id'], src_role['id'])
+        # Revoke role from projects user
+        self.roles_client.revoke_inherited_role_from_user_on_project(
+            self.project['id'], self.user['id'], src_role['id'])
+
+    @test.idempotent_id('26021436-d5a4-4256-943c-ded01e0d4b45')
+    def test_inherit_assign_check_revoke_roles_on_projects_group(self):
+        # Create role
+        src_role = self.roles_client.create_role(
+            name=data_utils.rand_name('Role'))['role']
+        self.addCleanup(self.roles_client.delete_role, src_role['id'])
+        # Assign role on projects group
+        self.roles_client.assign_inherited_role_on_projects_group(
+            self.project['id'], self.group['id'], src_role['id'])
+        # Check role on projects group
+        self.roles_client.check_group_has_flag_on_inherited_to_project(
+            self.project['id'], self.group['id'], src_role['id'])
+        # Revoke role from projects group
+        self.roles_client.revoke_inherited_role_from_group_on_project(
+            self.project['id'], self.group['id'], src_role['id'])
diff --git a/tempest/api/identity/base.py b/tempest/api/identity/base.py
index 91b3105..3bcae17 100644
--- a/tempest/api/identity/base.py
+++ b/tempest/api/identity/base.py
@@ -106,8 +106,8 @@
         cls.non_admin_roles_client = cls.os.roles_client
         cls.users_client = cls.os_adm.users_client
         cls.non_admin_users_client = cls.os.users_client
-        cls.services_client = cls.os_adm.services_v2_client
-        cls.endpoints_client = cls.os_adm.endpoints_v2_client
+        cls.services_client = cls.os_adm.identity_services_client
+        cls.endpoints_client = cls.os_adm.endpoints_client
 
     @classmethod
     def resource_setup(cls):
@@ -155,9 +155,9 @@
         cls.trusts_client = cls.os_adm.trusts_client
         cls.roles_client = cls.os_adm.roles_v3_client
         cls.token = cls.os_adm.token_v3_client
-        cls.endpoints_client = cls.os_adm.endpoints_client
+        cls.endpoints_client = cls.os_adm.endpoints_v3_client
         cls.regions_client = cls.os_adm.regions_client
-        cls.services_client = cls.os_adm.identity_services_client
+        cls.services_client = cls.os_adm.identity_services_v3_client
         cls.policies_client = cls.os_adm.policies_client
         cls.creds_client = cls.os_adm.credentials_client
         cls.groups_client = cls.os_adm.groups_client
diff --git a/tempest/api/network/test_routers.py b/tempest/api/network/test_routers.py
index 0b64be4..887a58f 100644
--- a/tempest/api/network/test_routers.py
+++ b/tempest/api/network/test_routers.py
@@ -270,7 +270,7 @@
 
     @test.idempotent_id('c86ac3a8-50bd-4b00-a6b8-62af84a0765c')
     @test.requires_ext(extension='extraroute', service='network')
-    def test_update_extra_route(self):
+    def test_update_delete_extra_route(self):
         # Create different cidr for each subnet to avoid cidr duplicate
         # The cidr starts from tenant_cidr
         next_cidr = netaddr.IPNetwork(self.tenant_cidr)
@@ -323,6 +323,10 @@
                              routes[i]['destination'])
             self.assertEqual(test_routes[i]['nexthop'], routes[i]['nexthop'])
 
+        self.client.delete_extra_routes(router['id'])
+        show_body_after_deletion = self.client.show_router(router['id'])
+        self.assertEmpty(show_body_after_deletion['router']['routes'])
+
     def _delete_extra_routes(self, router_id):
         self.client.delete_extra_routes(router_id)
 
diff --git a/tempest/clients.py b/tempest/clients.py
index e88a016..f1b4e55 100644
--- a/tempest/clients.py
+++ b/tempest/clients.py
@@ -103,32 +103,24 @@
     DatabaseLimitsClient
 from tempest.services.database.json.versions_client import \
     DatabaseVersionsClient
-from tempest.services.identity.v2.json.endpoints_client import \
-    EndpointsClient as EndpointsV2Client
-from tempest.services.identity.v2.json.identity_client import \
-    IdentityClient
-from tempest.services.identity.v2.json.roles_client import \
-    RolesClient
+from tempest.services.identity.v2.json.endpoints_client import EndpointsClient
+from tempest.services.identity.v2.json.identity_client import IdentityClient
+from tempest.services.identity.v2.json.roles_client import RolesClient
 from tempest.services.identity.v2.json.services_client import \
-    ServicesClient as ServicesV2Client
-from tempest.services.identity.v2.json.tenants_client import \
-    TenantsClient
-from tempest.services.identity.v2.json.users_client import \
-    UsersClient
+    ServicesClient as IdentityServicesClient
+from tempest.services.identity.v2.json.tenants_client import TenantsClient
+from tempest.services.identity.v2.json.users_client import UsersClient
 from tempest.services.identity.v3.json.credentials_client import \
-    CredentialsClient as CredentialsV3Client
+    CredentialsClient
 from tempest.services.identity.v3.json.domains_client import DomainsClient
 from tempest.services.identity.v3.json.endpoints_client import \
-    EndPointClient as EndPointV3Client
-from tempest.services.identity.v3.json.groups_client import \
-    GroupsClient as GroupsV3Client
+    EndPointsClient as EndPointsV3Client
+from tempest.services.identity.v3.json.groups_client import GroupsClient
 from tempest.services.identity.v3.json.identity_client import \
     IdentityClient as IdentityV3Client
-from tempest.services.identity.v3.json.policies_client import \
-    PoliciesClient as PoliciesV3Client
+from tempest.services.identity.v3.json.policies_client import PoliciesClient
 from tempest.services.identity.v3.json.projects_client import ProjectsClient
-from tempest.services.identity.v3.json.regions_client import \
-    RegionsClient as RegionsV3Client
+from tempest.services.identity.v3.json.regions_client import RegionsClient
 from tempest.services.identity.v3.json.roles_client import \
     RolesClient as RolesV3Client
 from tempest.services.identity.v3.json.services_client import \
@@ -488,18 +480,16 @@
         # Clients below use the admin endpoint type of Keystone API v2
         params_v2_admin = params.copy()
         params_v2_admin['endpoint_type'] = CONF.identity.v2_admin_endpoint_type
-        self.endpoints_v2_client = EndpointsV2Client(self.auth_provider,
-                                                     **params_v2_admin)
+        self.endpoints_client = EndpointsClient(self.auth_provider,
+                                                **params_v2_admin)
         self.identity_client = IdentityClient(self.auth_provider,
                                               **params_v2_admin)
         self.tenants_client = TenantsClient(self.auth_provider,
                                             **params_v2_admin)
-        self.roles_client = RolesClient(self.auth_provider,
-                                        **params_v2_admin)
-        self.users_client = UsersClient(self.auth_provider,
-                                        **params_v2_admin)
-        self.services_v2_client = ServicesV2Client(self.auth_provider,
-                                                   **params_v2_admin)
+        self.roles_client = RolesClient(self.auth_provider, **params_v2_admin)
+        self.users_client = UsersClient(self.auth_provider, **params_v2_admin)
+        self.identity_services_client = IdentityServicesClient(
+            self.auth_provider, **params_v2_admin)
 
         # Clients below use the public endpoint type of Keystone API v2
         params_v2_public = params.copy()
@@ -521,18 +511,17 @@
                                                    **params_v3)
         self.trusts_client = TrustsClient(self.auth_provider, **params_v3)
         self.users_v3_client = UsersV3Client(self.auth_provider, **params_v3)
-        self.endpoints_client = EndPointV3Client(self.auth_provider,
-                                                 **params_v3)
+        self.endpoints_v3_client = EndPointsV3Client(self.auth_provider,
+                                                     **params_v3)
         self.roles_v3_client = RolesV3Client(self.auth_provider, **params_v3)
-        self.identity_services_client = IdentityServicesV3Client(
+        self.identity_services_v3_client = IdentityServicesV3Client(
             self.auth_provider, **params_v3)
-        self.policies_client = PoliciesV3Client(self.auth_provider,
-                                                **params_v3)
+        self.policies_client = PoliciesClient(self.auth_provider, **params_v3)
         self.projects_client = ProjectsClient(self.auth_provider, **params_v3)
-        self.regions_client = RegionsV3Client(self.auth_provider, **params_v3)
-        self.credentials_client = CredentialsV3Client(self.auth_provider,
-                                                      **params_v3)
-        self.groups_client = GroupsV3Client(self.auth_provider, **params_v3)
+        self.regions_client = RegionsClient(self.auth_provider, **params_v3)
+        self.credentials_client = CredentialsClient(self.auth_provider,
+                                                    **params_v3)
+        self.groups_client = GroupsClient(self.auth_provider, **params_v3)
 
         # Token clients do not use the catalog. They only need default_params.
         # They read auth_url, so they should only be set if the corresponding
diff --git a/tempest/common/compute.py b/tempest/common/compute.py
index b14012e..2fbd1b2 100644
--- a/tempest/common/compute.py
+++ b/tempest/common/compute.py
@@ -17,9 +17,9 @@
 from oslo_utils import excutils
 
 from tempest.common import fixed_network
-from tempest.common import service_client
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common import rest_client
 from tempest.lib.common.utils import data_utils
 
 CONF = config.CONF
@@ -129,7 +129,7 @@
         servers = \
             [s for s in body_servers['servers'] if s['name'].startswith(name)]
     else:
-        body = service_client.ResponseBody(body.response, body['server'])
+        body = rest_client.ResponseBody(body.response, body['server'])
         servers = [body]
 
     # The name of the method to associate a floating IP to as server is too
diff --git a/tempest/common/negative_rest_client.py b/tempest/common/negative_rest_client.py
index d97411c..3495a24 100644
--- a/tempest/common/negative_rest_client.py
+++ b/tempest/common/negative_rest_client.py
@@ -15,30 +15,19 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from tempest.common import service_client
 from tempest import config
+from tempest.lib.common import rest_client
 
 CONF = config.CONF
 
 
-class NegativeRestClient(service_client.ServiceClient):
+class NegativeRestClient(rest_client.RestClient):
     """Version of RestClient that does not raise exceptions."""
-    def __init__(self, auth_provider, service,
-                 build_interval=None, build_timeout=None,
-                 disable_ssl_certificate_validation=None,
-                 ca_certs=None, trace_requests=None):
+    def __init__(self, auth_provider, service, **kwargs):
         region, endpoint_type = self._get_region_and_endpoint_type(service)
         super(NegativeRestClient, self).__init__(
-            auth_provider,
-            service,
-            region,
-            endpoint_type=endpoint_type,
-            build_interval=build_interval,
-            build_timeout=build_timeout,
-            disable_ssl_certificate_validation=(
-                disable_ssl_certificate_validation),
-            ca_certs=ca_certs,
-            trace_requests=trace_requests)
+            auth_provider, service, region, endpoint_type=endpoint_type,
+            **kwargs)
 
     def _get_region_and_endpoint_type(self, service):
         """Returns the region for a specific service"""
diff --git a/tempest/common/service_client.py b/tempest/common/service_client.py
deleted file mode 100644
index 14a3bd6..0000000
--- a/tempest/common/service_client.py
+++ /dev/null
@@ -1,84 +0,0 @@
-# Copyright 2015 NEC Corporation.  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.lib.common import rest_client
-
-
-class ServiceClient(rest_client.RestClient):
-
-    def __init__(self, auth_provider, service, region,
-                 endpoint_type=None, build_interval=None, build_timeout=None,
-                 disable_ssl_certificate_validation=None, ca_certs=None,
-                 trace_requests=None):
-
-        dscv = disable_ssl_certificate_validation
-        params = {
-            'disable_ssl_certificate_validation': dscv,
-            'ca_certs': ca_certs,
-            'trace_requests': trace_requests
-        }
-
-        if endpoint_type is not None:
-            params.update({'endpoint_type': endpoint_type})
-        if build_interval is not None:
-            params.update({'build_interval': build_interval})
-        if build_timeout is not None:
-            params.update({'build_timeout': build_timeout})
-        super(ServiceClient, self).__init__(auth_provider, service, region,
-                                            **params)
-
-
-class ResponseBody(dict):
-    """Class that wraps an http response and dict body into a single value.
-
-    Callers that receive this object will normally use it as a dict but
-    can extract the response if needed.
-    """
-
-    def __init__(self, response, body=None):
-        body_data = body or {}
-        self.update(body_data)
-        self.response = response
-
-    def __str__(self):
-        body = super(ResponseBody, self).__str__()
-        return "response: %s\nBody: %s" % (self.response, body)
-
-
-class ResponseBodyData(object):
-    """Class that wraps an http response and string data into a single value"""
-
-    def __init__(self, response, data):
-        self.response = response
-        self.data = data
-
-    def __str__(self):
-        return "response: %s\nBody: %s" % (self.response, self.data)
-
-
-class ResponseBodyList(list):
-    """Class that wraps an http response and list body into a single value.
-
-    Callers that receive this object will normally use it as a list but
-    can extract the response if needed.
-    """
-
-    def __init__(self, response, body=None):
-        body_data = body or []
-        self.extend(body_data)
-        self.response = response
-
-    def __str__(self):
-        body = super(ResponseBodyList, self).__str__()
-        return "response: %s\nBody: %s" % (self.response, body)
diff --git a/tempest/services/identity/v3/json/endpoints_client.py b/tempest/services/identity/v3/json/endpoints_client.py
index c83212f..db30508 100644
--- a/tempest/services/identity/v3/json/endpoints_client.py
+++ b/tempest/services/identity/v3/json/endpoints_client.py
@@ -22,7 +22,7 @@
 from tempest.lib.common import rest_client
 
 
-class EndPointClient(rest_client.RestClient):
+class EndPointsClient(rest_client.RestClient):
     api_version = "v3"
 
     def list_endpoints(self):
diff --git a/tempest/services/identity/v3/json/roles_client.py b/tempest/services/identity/v3/json/roles_client.py
index 303a892..bdb0490 100644
--- a/tempest/services/identity/v3/json/roles_client.py
+++ b/tempest/services/identity/v3/json/roles_client.py
@@ -183,3 +183,133 @@
                                (domain_id, group_id, role_id))
         self.expected_success(204, resp.status)
         return rest_client.ResponseBody(resp)
+
+    def assign_inherited_role_on_domains_user(
+            self, domain_id, user_id, role_id):
+        """Assigns a role to a user on projects owned by a domain."""
+        resp, body = self.put(
+            "OS-INHERIT/domains/%s/users/%s/roles/%s/inherited_to_projects"
+            % (domain_id, user_id, role_id), None)
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def revoke_inherited_role_from_user_on_domain(
+            self, domain_id, user_id, role_id):
+        """Revokes an inherited project role from a user on a domain."""
+        resp, body = self.delete(
+            "OS-INHERIT/domains/%s/users/%s/roles/%s/inherited_to_projects"
+            % (domain_id, user_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def list_inherited_project_role_for_user_on_domain(
+            self, domain_id, user_id):
+        """Lists the inherited project roles on a domain for a user."""
+        resp, body = self.get(
+            "OS-INHERIT/domains/%s/users/%s/roles/inherited_to_projects"
+            % (domain_id, user_id))
+        self.expected_success(200, resp.status)
+        body = json.loads(body)
+        return rest_client.ResponseBody(resp, body)
+
+    def check_user_inherited_project_role_on_domain(
+            self, domain_id, user_id, role_id):
+        """Checks whether a user has an inherited project role on a domain."""
+        resp, body = self.head(
+            "OS-INHERIT/domains/%s/users/%s/roles/%s/inherited_to_projects"
+            % (domain_id, user_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp)
+
+    def assign_inherited_role_on_domains_group(
+            self, domain_id, group_id, role_id):
+        """Assigns a role to a group on projects owned by a domain."""
+        resp, body = self.put(
+            "OS-INHERIT/domains/%s/groups/%s/roles/%s/inherited_to_projects"
+            % (domain_id, group_id, role_id), None)
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def revoke_inherited_role_from_group_on_domain(
+            self, domain_id, group_id, role_id):
+        """Revokes an inherited project role from a group on a domain."""
+        resp, body = self.delete(
+            "OS-INHERIT/domains/%s/groups/%s/roles/%s/inherited_to_projects"
+            % (domain_id, group_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def list_inherited_project_role_for_group_on_domain(
+            self, domain_id, group_id):
+        """Lists the inherited project roles on a domain for a group."""
+        resp, body = self.get(
+            "OS-INHERIT/domains/%s/groups/%s/roles/inherited_to_projects"
+            % (domain_id, group_id))
+        self.expected_success(200, resp.status)
+        body = json.loads(body)
+        return rest_client.ResponseBody(resp, body)
+
+    def check_group_inherited_project_role_on_domain(
+            self, domain_id, group_id, role_id):
+        """Checks whether a group has an inherited project role on a domain."""
+        resp, body = self.head(
+            "OS-INHERIT/domains/%s/groups/%s/roles/%s/inherited_to_projects"
+            % (domain_id, group_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp)
+
+    def assign_inherited_role_on_projects_user(
+            self, project_id, user_id, role_id):
+        """Assigns a role to a user on projects in a subtree."""
+        resp, body = self.put(
+            "OS-INHERIT/projects/%s/users/%s/roles/%s/inherited_to_projects"
+            % (project_id, user_id, role_id), None)
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def revoke_inherited_role_from_user_on_project(
+            self, project_id, user_id, role_id):
+        """Revokes an inherited role from a user on a project."""
+        resp, body = self.delete(
+            "OS-INHERIT/projects/%s/users/%s/roles/%s/inherited_to_projects"
+            % (project_id, user_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def check_user_has_flag_on_inherited_to_project(
+            self, project_id, user_id, role_id):
+        """Checks whether a user has a role assignment"""
+        """with the inherited_to_projects flag on a project."""
+        resp, body = self.head(
+            "OS-INHERIT/projects/%s/users/%s/roles/%s/inherited_to_projects"
+            % (project_id, user_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp)
+
+    def assign_inherited_role_on_projects_group(
+            self, project_id, group_id, role_id):
+        """Assigns a role to a group on projects in a subtree."""
+        resp, body = self.put(
+            "OS-INHERIT/projects/%s/groups/%s/roles/%s/inherited_to_projects"
+            % (project_id, group_id, role_id), None)
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def revoke_inherited_role_from_group_on_project(
+            self, project_id, group_id, role_id):
+        """Revokes an inherited role from a group on a project."""
+        resp, body = self.delete(
+            "OS-INHERIT/projects/%s/groups/%s/roles/%s/inherited_to_projects"
+            % (project_id, group_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
+    def check_group_has_flag_on_inherited_to_project(
+            self, project_id, group_id, role_id):
+        """Checks whether a group has a role assignment"""
+        """with the inherited_to_projects flag on a project."""
+        resp, body = self.head(
+            "OS-INHERIT/projects/%s/groups/%s/roles/%s/inherited_to_projects"
+            % (project_id, group_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp)
diff --git a/tempest/tests/common/test_dynamic_creds.py b/tempest/tests/common/test_dynamic_creds.py
index 059269e..d625284 100644
--- a/tempest/tests/common/test_dynamic_creds.py
+++ b/tempest/tests/common/test_dynamic_creds.py
@@ -18,9 +18,9 @@
 
 from tempest.common import credentials_factory as credentials
 from tempest.common import dynamic_creds
-from tempest.common import service_client
 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
@@ -74,7 +74,7 @@
         user_fix = self.useFixture(mockpatch.PatchObject(
             json_users_client.UsersClient,
             'create_user',
-            return_value=(service_client.ResponseBody
+            return_value=(rest_client.ResponseBody
                           (200, {'user': {'id': id, 'name': name}}))))
         return user_fix
 
@@ -82,7 +82,7 @@
         tenant_fix = self.useFixture(mockpatch.PatchObject(
             json_tenants_client.TenantsClient,
             'create_tenant',
-            return_value=(service_client.ResponseBody
+            return_value=(rest_client.ResponseBody
                           (200, {'tenant': {'id': id, 'name': name}}))))
         return tenant_fix
 
@@ -90,7 +90,7 @@
         roles_fix = self.useFixture(mockpatch.PatchObject(
             json_roles_client.RolesClient,
             'list_roles',
-            return_value=(service_client.ResponseBody
+            return_value=(rest_client.ResponseBody
                           (200,
                            {'roles': [{'id': id, 'name': name},
                             {'id': '1', 'name': 'FakeRole'},
@@ -101,7 +101,7 @@
         roles_fix = self.useFixture(mockpatch.PatchObject(
             json_roles_client.RolesClient,
             'list_roles',
-            return_value=(service_client.ResponseBody
+            return_value=(rest_client.ResponseBody
                           (200,
                            {'roles': [{'id': '1234', 'name': 'role1'},
                             {'id': '1', 'name': 'FakeRole'},
@@ -112,7 +112,7 @@
         tenant_fix = self.useFixture(mockpatch.PatchObject(
             json_roles_client.RolesClient,
             'assign_user_role',
-            return_value=(service_client.ResponseBody
+            return_value=(rest_client.ResponseBody
                           (200, {}))))
         return tenant_fix
 
@@ -120,7 +120,7 @@
         roles_fix = self.useFixture(mockpatch.PatchObject(
             json_roles_client.RolesClient,
             'list_roles',
-            return_value=(service_client.ResponseBody
+            return_value=(rest_client.ResponseBody
                           (200, {'roles': [{'id': '1',
                                  'name': 'FakeRole'}]}))))
         return roles_fix
@@ -129,7 +129,7 @@
         ec2_creds_fix = self.useFixture(mockpatch.PatchObject(
             json_users_client.UsersClient,
             'list_user_ec2_credentials',
-            return_value=(service_client.ResponseBody
+            return_value=(rest_client.ResponseBody
                           (200, {'credentials': [{
                                  'access': 'fake_access',
                                  'secret': 'fake_secret',