diff --git a/tempest/api/identity/admin/v3/test_roles.py b/tempest/api/identity/admin/v3/test_roles.py
index dd7d5af..e5137f4 100644
--- a/tempest/api/identity/admin/v3/test_roles.py
+++ b/tempest/api/identity/admin/v3/test_roles.py
@@ -142,6 +142,26 @@
         self.roles_client.delete_role_from_user_on_domain(
             self.domain['id'], self.user_body['id'], self.role['id'])
 
+    @testtools.skipIf(CONF.identity_feature_enabled.immutable_user_source,
+                      'Skipped because environment has an immutable user '
+                      'source and solely provides read-only access to users.')
+    @decorators.idempotent_id('e5a81737-d294-424d-8189-8664858aae4c')
+    def test_grant_list_revoke_role_to_user_on_system(self):
+        self.roles_client.create_user_role_on_system(
+            self.user_body['id'], self.role['id'])
+
+        roles = self.roles_client.list_user_roles_on_system(
+            self.user_body['id'])['roles']
+
+        self.assertEqual(1, len(roles))
+        self.assertEqual(self.role['id'], roles[0]['id'])
+
+        self.roles_client.check_user_role_existence_on_system(
+            self.user_body['id'], self.role['id'])
+
+        self.roles_client.delete_role_from_user_on_system(
+            self.user_body['id'], self.role['id'])
+
     @decorators.idempotent_id('cbf11737-1904-4690-9613-97bcbb3df1c4')
     @testtools.skipIf(CONF.identity_feature_enabled.immutable_user_source,
                       'Skipped because environment has an immutable user '
@@ -197,6 +217,23 @@
         self.roles_client.delete_role_from_group_on_domain(
             self.domain['id'], self.group_body['id'], self.role['id'])
 
+    @decorators.idempotent_id('c888fe4f-8018-48db-b959-542225c1b4b6')
+    def test_grant_list_revoke_role_to_group_on_system(self):
+        self.roles_client.create_group_role_on_system(
+            self.group_body['id'], self.role['id'])
+
+        roles = self.roles_client.list_group_roles_on_system(
+            self.group_body['id'])['roles']
+
+        self.assertEqual(1, len(roles))
+        self.assertEqual(self.role['id'], roles[0]['id'])
+
+        self.roles_client.check_role_from_group_on_system_existence(
+            self.group_body['id'], self.role['id'])
+
+        self.roles_client.delete_role_from_group_on_system(
+            self.group_body['id'], self.role['id'])
+
     @decorators.idempotent_id('f5654bcc-08c4-4f71-88fe-05d64e06de94')
     def test_list_roles(self):
         """Test listing roles"""
diff --git a/tempest/lib/services/identity/v3/roles_client.py b/tempest/lib/services/identity/v3/roles_client.py
index 0d7593a..e41dc28 100644
--- a/tempest/lib/services/identity/v3/roles_client.py
+++ b/tempest/lib/services/identity/v3/roles_client.py
@@ -89,6 +89,13 @@
         self.expected_success(204, resp.status)
         return rest_client.ResponseBody(resp, body)
 
+    def create_user_role_on_system(self, user_id, role_id):
+        """Add roles to a user on the system."""
+        resp, body = self.put('system/users/%s/roles/%s' %
+                              (user_id, role_id), None)
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
     def list_user_roles_on_project(self, project_id, user_id):
         """list roles of a user on a project."""
         resp, body = self.get('projects/%s/users/%s/roles' %
@@ -105,6 +112,13 @@
         body = json.loads(body)
         return rest_client.ResponseBody(resp, body)
 
+    def list_user_roles_on_system(self, user_id):
+        """list roles of a user on the system."""
+        resp, body = self.get('system/users/%s/roles' % user_id)
+        self.expected_success(200, resp.status)
+        body = json.loads(body)
+        return rest_client.ResponseBody(resp, body)
+
     def delete_role_from_user_on_project(self, project_id, user_id, role_id):
         """Delete role of a user on a project."""
         resp, body = self.delete('projects/%s/users/%s/roles/%s' %
@@ -119,6 +133,13 @@
         self.expected_success(204, resp.status)
         return rest_client.ResponseBody(resp, body)
 
+    def delete_role_from_user_on_system(self, user_id, role_id):
+        """Delete role of a user on the system."""
+        resp, body = self.delete('system/users/%s/roles/%s' %
+                                 (user_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
     def check_user_role_existence_on_project(self, project_id,
                                              user_id, role_id):
         """Check role of a user on a project."""
@@ -135,6 +156,12 @@
         self.expected_success(204, resp.status)
         return rest_client.ResponseBody(resp)
 
+    def check_user_role_existence_on_system(self, user_id, role_id):
+        """Check role of a user on the system."""
+        resp, body = self.head('system/users/%s/roles/%s' % (user_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp)
+
     def create_group_role_on_project(self, project_id, group_id, role_id):
         """Add roles to a group on a project."""
         resp, body = self.put('projects/%s/groups/%s/roles/%s' %
@@ -149,6 +176,13 @@
         self.expected_success(204, resp.status)
         return rest_client.ResponseBody(resp, body)
 
+    def create_group_role_on_system(self, group_id, role_id):
+        """Add roles to a group on the system."""
+        resp, body = self.put('system/groups/%s/roles/%s' %
+                              (group_id, role_id), None)
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
     def list_group_roles_on_project(self, project_id, group_id):
         """list roles of a group on a project."""
         resp, body = self.get('projects/%s/groups/%s/roles' %
@@ -165,6 +199,13 @@
         body = json.loads(body)
         return rest_client.ResponseBody(resp, body)
 
+    def list_group_roles_on_system(self, group_id):
+        """list roles of a group on the system."""
+        resp, body = self.get('system/groups/%s/roles' % group_id)
+        self.expected_success(200, resp.status)
+        body = json.loads(body)
+        return rest_client.ResponseBody(resp, body)
+
     def delete_role_from_group_on_project(self, project_id, group_id, role_id):
         """Delete role of a group on a project."""
         resp, body = self.delete('projects/%s/groups/%s/roles/%s' %
@@ -179,6 +220,13 @@
         self.expected_success(204, resp.status)
         return rest_client.ResponseBody(resp, body)
 
+    def delete_role_from_group_on_system(self, group_id, role_id):
+        """Delete role of a group on the system."""
+        resp, body = self.delete('system/groups/%s/roles/%s' %
+                                 (group_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp, body)
+
     def check_role_from_group_on_project_existence(self, project_id,
                                                    group_id, role_id):
         """Check role of a group on a project."""
@@ -195,6 +243,13 @@
         self.expected_success(204, resp.status)
         return rest_client.ResponseBody(resp)
 
+    def check_role_from_group_on_system_existence(self, group_id, role_id):
+        """Check role of a group on the system."""
+        resp, body = self.head('system/groups/%s/roles/%s' %
+                               (group_id, role_id))
+        self.expected_success(204, resp.status)
+        return rest_client.ResponseBody(resp)
+
     def create_role_inference_rule(self, prior_role, implies_role):
         """Create a role inference rule."""
         resp, body = self.put('roles/%s/implies/%s' %
diff --git a/tempest/tests/lib/services/identity/v3/test_roles_client.py b/tempest/tests/lib/services/identity/v3/test_roles_client.py
index 8d6bb42..e963310 100644
--- a/tempest/tests/lib/services/identity/v3/test_roles_client.py
+++ b/tempest/tests/lib/services/identity/v3/test_roles_client.py
@@ -225,6 +225,16 @@
             role_id="1234",
             status=204)
 
+    def _test_create_user_role_on_system(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.create_user_role_on_system,
+            'tempest.lib.common.rest_client.RestClient.put',
+            {},
+            bytes_body,
+            user_id="123",
+            role_id="1234",
+            status=204)
+
     def _test_list_user_roles_on_project(self, bytes_body=False):
         self.check_service_client_function(
             self.client.list_user_roles_on_project,
@@ -243,6 +253,14 @@
             domain_id="b344506af7644f6794d9cb316600b020",
             user_id="123")
 
+    def _test_list_user_roles_on_system(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.list_user_roles_on_system,
+            'tempest.lib.common.rest_client.RestClient.get',
+            self.FAKE_LIST_ROLES,
+            bytes_body,
+            user_id="123")
+
     def _test_create_group_role_on_project(self, bytes_body=False):
         self.check_service_client_function(
             self.client.create_group_role_on_project,
@@ -265,6 +283,16 @@
             role_id="1234",
             status=204)
 
+    def _test_create_group_role_on_system(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.create_group_role_on_system,
+            'tempest.lib.common.rest_client.RestClient.put',
+            {},
+            bytes_body,
+            group_id="123",
+            role_id="1234",
+            status=204)
+
     def _test_list_group_roles_on_project(self, bytes_body=False):
         self.check_service_client_function(
             self.client.list_group_roles_on_project,
@@ -283,6 +311,15 @@
             domain_id="b344506af7644f6794d9cb316600b020",
             group_id="123")
 
+    def _test_list_group_roles_on_system(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.list_group_roles_on_system,
+            'tempest.lib.common.rest_client.RestClient.get',
+            self.FAKE_LIST_ROLES,
+            bytes_body,
+            domain_id="b344506af7644f6794d9cb316600b020",
+            group_id="123")
+
     def _test_create_role_inference_rule(self, bytes_body=False):
         self.check_service_client_function(
             self.client.create_role_inference_rule,
@@ -405,6 +442,15 @@
             role_id="1234",
             status=204)
 
+    def test_delete_role_from_user_on_system(self):
+        self.check_service_client_function(
+            self.client.delete_role_from_user_on_system,
+            'tempest.lib.common.rest_client.RestClient.delete',
+            {},
+            user_id="123",
+            role_id="1234",
+            status=204)
+
     def test_delete_role_from_group_on_project(self):
         self.check_service_client_function(
             self.client.delete_role_from_group_on_project,
@@ -425,6 +471,15 @@
             role_id="1234",
             status=204)
 
+    def test_delete_role_from_group_on_system(self):
+        self.check_service_client_function(
+            self.client.delete_role_from_group_on_system,
+            'tempest.lib.common.rest_client.RestClient.delete',
+            {},
+            group_id="123",
+            role_id="1234",
+            status=204)
+
     def test_check_user_role_existence_on_project(self):
         self.check_service_client_function(
             self.client.check_user_role_existence_on_project,
@@ -445,6 +500,15 @@
             role_id="1234",
             status=204)
 
+    def test_check_user_role_existence_on_system(self):
+        self.check_service_client_function(
+            self.client.check_user_role_existence_on_system,
+            'tempest.lib.common.rest_client.RestClient.head',
+            {},
+            user_id="123",
+            role_id="1234",
+            status=204)
+
     def test_check_role_from_group_on_project_existence(self):
         self.check_service_client_function(
             self.client.check_role_from_group_on_project_existence,
@@ -465,6 +529,15 @@
             role_id="1234",
             status=204)
 
+    def test_check_role_from_group_on_system_existence(self):
+        self.check_service_client_function(
+            self.client.check_role_from_group_on_system_existence,
+            'tempest.lib.common.rest_client.RestClient.head',
+            {},
+            group_id="123",
+            role_id="1234",
+            status=204)
+
     def test_create_role_inference_rule_with_str_body(self):
         self._test_create_role_inference_rule()