diff --git a/tempest/api/identity/admin/v3/test_default_project_id.py b/tempest/api/identity/admin/v3/test_default_project_id.py
new file mode 100644
index 0000000..8ffd1ed
--- /dev/null
+++ b/tempest/api/identity/admin/v3/test_default_project_id.py
@@ -0,0 +1,84 @@
+#    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 import auth
+from tempest import clients
+from tempest.common.utils import data_utils
+from tempest import test
+
+
+class TestDefaultProjectId (base.BaseIdentityV3AdminTest):
+    _interface = 'json'
+
+    @classmethod
+    def resource_setup(cls):
+        cls.set_network_resources()
+        super(TestDefaultProjectId, cls).resource_setup()
+
+    def _delete_domain(self, domain_id):
+        # It is necessary to disable the domain before deleting,
+        # or else it would result in unauthorized error
+        self.client.update_domain(domain_id, enabled=False)
+        self.client.delete_domain(domain_id)
+
+    @test.attr(type='smoke')
+    def test_default_project_id(self):
+        # create a domain
+        dom_name = data_utils.rand_name('dom')
+        _, domain_body = self.client.create_domain(dom_name)
+        dom_id = domain_body['id']
+        self.addCleanup(self._delete_domain, dom_id)
+
+        # create a project in the domain
+        proj_name = data_utils.rand_name('proj')
+        _, proj_body = self.client.create_project(proj_name, domain_id=dom_id)
+        proj_id = proj_body['id']
+        self.addCleanup(self.client.delete_project, proj_id)
+        self.assertEqual(proj_body['domain_id'], dom_id,
+                         "project " + proj_name +
+                         "doesn't have domain id " + dom_id)
+
+        # create a user in the domain, with the previous project as his
+        # default project
+        user_name = data_utils.rand_name('user')
+        _, user_body = self.client.create_user(user_name, password=user_name,
+                                               domain_id=dom_id,
+                                               default_project_id=proj_id)
+        user_id = user_body['id']
+        self.addCleanup(self.client.delete_user, user_id)
+        self.assertEqual(user_body['domain_id'], dom_id,
+                         "user " + user_name +
+                         "doesn't have domain id " + dom_id)
+
+        # get roles and find the admin role
+        admin_role = self.get_role_by_name("admin")
+        admin_role_id = admin_role['id']
+
+        # grant the admin role to the user on his project
+        self.client.assign_user_role_on_project(proj_id, user_id,
+                                                admin_role_id)
+
+        # create a new client with user's credentials (NOTE: unscoped token!)
+        creds = auth.KeystoneV3Credentials(username=user_name,
+                                           password=user_name,
+                                           domain_name=dom_name)
+        auth_provider = auth.KeystoneV3AuthProvider(creds)
+        creds = auth_provider.fill_credentials()
+        admin_client = clients.Manager(interface=self._interface,
+                                       credentials=creds)
+
+        # verify the user's token and see that it is scoped to the project
+        token, auth_data = admin_client.auth_provider.get_auth()
+        _, result = admin_client.identity_v3_client.get_token(token)
+        self.assertEqual(result['project']['domain']['id'], dom_id)
+        self.assertEqual(result['project']['id'], proj_id)
diff --git a/tempest/services/identity/v3/json/identity_client.py b/tempest/services/identity/v3/json/identity_client.py
index 5ad416c..6ac4901 100644
--- a/tempest/services/identity/v3/json/identity_client.py
+++ b/tempest/services/identity/v3/json/identity_client.py
@@ -36,8 +36,10 @@
         """Creates a user."""
         en = kwargs.get('enabled', True)
         description = kwargs.get('description', None)
+        default_project_id = kwargs.get('default_project_id')
         post_body = {
             'project_id': project_id,
+            'default_project_id': default_project_id,
             'description': description,
             'domain_id': domain_id,
             'email': email,
@@ -57,6 +59,11 @@
         email = kwargs.get('email', body['email'])
         en = kwargs.get('enabled', body['enabled'])
         project_id = kwargs.get('project_id', body['project_id'])
+        if 'default_project_id' in body.keys():
+            default_project_id = kwargs.get('default_project_id',
+                                            body['default_project_id'])
+        else:
+            default_project_id = kwargs.get('default_project_id')
         description = kwargs.get('description', body['description'])
         domain_id = kwargs.get('domain_id', body['domain_id'])
         post_body = {
@@ -64,6 +71,7 @@
             'email': email,
             'enabled': en,
             'project_id': project_id,
+            'default_project_id': default_project_id,
             'id': user_id,
             'domain_id': domain_id,
             'description': description