diff --git a/releasenotes/notes/add-new-identity-clients-as-library-5f7ndha733nwdsn9.yaml b/releasenotes/notes/add-new-identity-clients-as-library-5f7ndha733nwdsn9.yaml
index 2e387a4..c2742a3 100644
--- a/releasenotes/notes/add-new-identity-clients-as-library-5f7ndha733nwdsn9.yaml
+++ b/releasenotes/notes/add-new-identity-clients-as-library-5f7ndha733nwdsn9.yaml
@@ -10,3 +10,4 @@
       * users_client(v3)
       * identity_client(v3)
       * roles_client(v3)
+      * inherited_roles_client(v3)
diff --git a/tempest/services/identity/v3/json/inherited_roles_client.py b/tempest/lib/services/identity/v3/inherited_roles_client.py
similarity index 100%
rename from tempest/services/identity/v3/json/inherited_roles_client.py
rename to tempest/lib/services/identity/v3/inherited_roles_client.py
diff --git a/tempest/services/identity/v3/__init__.py b/tempest/services/identity/v3/__init__.py
index ddbb0de..2dff949 100644
--- a/tempest/services/identity/v3/__init__.py
+++ b/tempest/services/identity/v3/__init__.py
@@ -15,6 +15,8 @@
 from tempest.lib.services.identity.v3.endpoints_client import EndPointsClient
 from tempest.lib.services.identity.v3.groups_client import GroupsClient
 from tempest.lib.services.identity.v3.identity_client import IdentityClient
+from tempest.lib.services.identity.v3.inherited_roles_client import \
+    InheritedRolesClient
 from tempest.lib.services.identity.v3.policies_client import PoliciesClient
 from tempest.lib.services.identity.v3.projects_client import ProjectsClient
 from tempest.lib.services.identity.v3.regions_client import RegionsClient
@@ -25,12 +27,10 @@
 from tempest.services.identity.v3.json.credentials_client import \
     CredentialsClient
 from tempest.services.identity.v3.json.domains_client import DomainsClient
-from tempest.services.identity.v3.json.inherited_roles_client import \
-    InheritedRolesClient
 from tempest.services.identity.v3.json.trusts_client import TrustsClient
 
 __all__ = ['EndPointsClient', 'GroupsClient', 'IdentityClient',
-           'PoliciesClient', 'ProjectsClient', 'RegionsClient',
-           'RolesClient', 'ServicesClient', 'V3TokenClient', 'UsersClient',
-           'CredentialsClient', 'DomainsClient', 'InheritedRolesClient',
+           'InheritedRolesClient', 'PoliciesClient', 'ProjectsClient',
+           'RegionsClient', 'RolesClient', 'ServicesClient', 'V3TokenClient',
+           'UsersClient', 'CredentialsClient', 'DomainsClient',
            'TrustsClient', ]
diff --git a/tempest/tests/lib/services/identity/v3/test_inherited_roles_client.py b/tempest/tests/lib/services/identity/v3/test_inherited_roles_client.py
new file mode 100644
index 0000000..9da3cce
--- /dev/null
+++ b/tempest/tests/lib/services/identity/v3/test_inherited_roles_client.py
@@ -0,0 +1,220 @@
+# Copyright 2016 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.services.identity.v3 import inherited_roles_client
+from tempest.tests.lib import fake_auth_provider
+from tempest.tests.lib.services import base
+
+
+class TestInheritedRolesClient(base.BaseServiceTest):
+    FAKE_LIST_INHERITED_ROLES = {
+        "roles": [
+            {
+                "id": "1",
+                "name": "test",
+                "links": "example.com"
+            },
+            {
+                "id": "2",
+                "name": "test2",
+                "links": "example.com"
+            }
+        ]
+    }
+
+    def setUp(self):
+        super(TestInheritedRolesClient, self).setUp()
+        fake_auth = fake_auth_provider.FakeAuthProvider()
+        self.client = inherited_roles_client.InheritedRolesClient(
+            fake_auth, 'identity', 'regionOne')
+
+    def _test_create_inherited_role_on_domains_user(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.create_inherited_role_on_domains_user,
+            'tempest.lib.common.rest_client.RestClient.put',
+            {},
+            bytes_body,
+            domain_id="b344506af7644f6794d9cb316600b020",
+            user_id="123",
+            role_id="1234",
+            status=204)
+
+    def _test_list_inherited_project_role_for_user_on_domain(
+        self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.list_inherited_project_role_for_user_on_domain,
+            'tempest.lib.common.rest_client.RestClient.get',
+            self.FAKE_LIST_INHERITED_ROLES,
+            bytes_body,
+            domain_id="b344506af7644f6794d9cb316600b020",
+            user_id="123")
+
+    def _test_create_inherited_role_on_domains_group(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.create_inherited_role_on_domains_group,
+            'tempest.lib.common.rest_client.RestClient.put',
+            {},
+            bytes_body,
+            domain_id="b344506af7644f6794d9cb316600b020",
+            group_id="123",
+            role_id="1234",
+            status=204)
+
+    def _test_list_inherited_project_role_for_group_on_domain(
+        self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.list_inherited_project_role_for_group_on_domain,
+            'tempest.lib.common.rest_client.RestClient.get',
+            self.FAKE_LIST_INHERITED_ROLES,
+            bytes_body,
+            domain_id="b344506af7644f6794d9cb316600b020",
+            group_id="123")
+
+    def _test_create_inherited_role_on_projects_user(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.create_inherited_role_on_projects_user,
+            'tempest.lib.common.rest_client.RestClient.put',
+            {},
+            bytes_body,
+            project_id="b344506af7644f6794d9cb316600b020",
+            user_id="123",
+            role_id="1234",
+            status=204)
+
+    def _test_create_inherited_role_on_projects_group(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.create_inherited_role_on_projects_group,
+            'tempest.lib.common.rest_client.RestClient.put',
+            {},
+            bytes_body,
+            project_id="b344506af7644f6794d9cb316600b020",
+            group_id="123",
+            role_id="1234",
+            status=204)
+
+    def test_create_inherited_role_on_domains_user_with_str_body(self):
+        self._test_create_inherited_role_on_domains_user()
+
+    def test_create_inherited_role_on_domains_user_with_bytes_body(self):
+        self._test_create_inherited_role_on_domains_user(bytes_body=True)
+
+    def test_create_inherited_role_on_domains_group_with_str_body(self):
+        self._test_create_inherited_role_on_domains_group()
+
+    def test_create_inherited_role_on_domains_group_with_bytes_body(self):
+        self._test_create_inherited_role_on_domains_group(bytes_body=True)
+
+    def test_create_inherited_role_on_projects_user_with_str_body(self):
+        self._test_create_inherited_role_on_projects_user()
+
+    def test_create_inherited_role_on_projects_group_with_bytes_body(self):
+        self._test_create_inherited_role_on_projects_group(bytes_body=True)
+
+    def test_list_inherited_project_role_for_user_on_domain_with_str_body(
+        self):
+        self._test_list_inherited_project_role_for_user_on_domain()
+
+    def test_list_inherited_project_role_for_user_on_domain_with_bytes_body(
+        self):
+        self._test_list_inherited_project_role_for_user_on_domain(
+            bytes_body=True)
+
+    def test_list_inherited_project_role_for_group_on_domain_with_str_body(
+        self):
+        self._test_list_inherited_project_role_for_group_on_domain()
+
+    def test_list_inherited_project_role_for_group_on_domain_with_bytes_body(
+        self):
+        self._test_list_inherited_project_role_for_group_on_domain(
+            bytes_body=True)
+
+    def test_delete_inherited_role_from_user_on_domain(self):
+        self.check_service_client_function(
+            self.client.delete_inherited_role_from_user_on_domain,
+            'tempest.lib.common.rest_client.RestClient.delete',
+            {},
+            domain_id="b344506af7644f6794d9cb316600b020",
+            user_id="123",
+            role_id="1234",
+            status=204)
+
+    def test_check_user_inherited_project_role_on_domain(self):
+        self.check_service_client_function(
+            self.client.check_user_inherited_project_role_on_domain,
+            'tempest.lib.common.rest_client.RestClient.head',
+            {},
+            domain_id="b344506af7644f6794d9cb316600b020",
+            user_id="123",
+            role_id="1234",
+            status=204)
+
+    def test_delete_inherited_role_from_group_on_domain(self):
+        self.check_service_client_function(
+            self.client.delete_inherited_role_from_group_on_domain,
+            'tempest.lib.common.rest_client.RestClient.delete',
+            {},
+            domain_id="b344506af7644f6794d9cb316600b020",
+            group_id="123",
+            role_id="1234",
+            status=204)
+
+    def test_check_group_inherited_project_role_on_domain(self):
+        self.check_service_client_function(
+            self.client.check_group_inherited_project_role_on_domain,
+            'tempest.lib.common.rest_client.RestClient.head',
+            {},
+            domain_id="b344506af7644f6794d9cb316600b020",
+            group_id="123",
+            role_id="1234",
+            status=204)
+
+    def test_delete_inherited_role_from_user_on_project(self):
+        self.check_service_client_function(
+            self.client.delete_inherited_role_from_user_on_project,
+            'tempest.lib.common.rest_client.RestClient.delete',
+            {},
+            project_id="b344506af7644f6794d9cb316600b020",
+            user_id="123",
+            role_id="1234",
+            status=204)
+
+    def test_check_user_has_flag_on_inherited_to_project(self):
+        self.check_service_client_function(
+            self.client.check_user_has_flag_on_inherited_to_project,
+            'tempest.lib.common.rest_client.RestClient.head',
+            {},
+            project_id="b344506af7644f6794d9cb316600b020",
+            user_id="123",
+            role_id="1234",
+            status=204)
+
+    def test_delete_inherited_role_from_group_on_project(self):
+        self.check_service_client_function(
+            self.client.delete_inherited_role_from_group_on_project,
+            'tempest.lib.common.rest_client.RestClient.delete',
+            {},
+            project_id="b344506af7644f6794d9cb316600b020",
+            group_id="123",
+            role_id="1234",
+            status=204)
+
+    def test_check_group_has_flag_on_inherited_to_project(self):
+        self.check_service_client_function(
+            self.client.check_group_has_flag_on_inherited_to_project,
+            'tempest.lib.common.rest_client.RestClient.head',
+            {},
+            project_id="b344506af7644f6794d9cb316600b020",
+            group_id="123",
+            role_id="1234",
+            status=204)