diff --git a/tempest/api/compute/servers/test_server_actions.py b/tempest/api/compute/servers/test_server_actions.py
index 696ee24..751d33a 100644
--- a/tempest/api/compute/servers/test_server_actions.py
+++ b/tempest/api/compute/servers/test_server_actions.py
@@ -145,6 +145,18 @@
         # The server should be signaled to reboot gracefully
         self._test_reboot_server('SOFT')
 
+    @decorators.idempotent_id('1d1c9104-1b0a-11e7-a3d4-fa163e65f5ce')
+    def test_remove_server_all_security_groups(self):
+        server = self.create_test_server(wait_until='ACTIVE')
+
+        # Remove all Security group
+        self.client.remove_security_group(
+            server['id'], name=server['security_groups'][0]['name'])
+
+        # Verify all Security group
+        server = self.client.show_server(server['id'])['server']
+        self.assertNotIn('security_groups', server)
+
     def _rebuild_server_and_check(self, image_ref):
         rebuilt_server = (self.client.rebuild_server(self.server_id, image_ref)
                           ['server'])
diff --git a/tempest/api/identity/admin/v2/test_tokens.py b/tempest/api/identity/admin/v2/test_tokens.py
index 98abd02..b288705 100644
--- a/tempest/api/identity/admin/v2/test_tokens.py
+++ b/tempest/api/identity/admin/v2/test_tokens.py
@@ -31,12 +31,10 @@
         # Delete the tenant at the end of the test
         self.addCleanup(self.tenants_client.delete_tenant, tenant['id'])
         # second:create a user
-        user = self.users_client.create_user(name=user_name,
-                                             password=user_password,
-                                             tenantId=tenant['id'],
-                                             email='')['user']
-        # Delete the user at the end of the test
-        self.addCleanup(self.users_client.delete_user, user['id'])
+        user = self.create_test_user(name=user_name,
+                                     password=user_password,
+                                     tenantId=tenant['id'],
+                                     email='')
         # then get a token for the user
         body = self.token_client.auth(user_name,
                                       user_password,
@@ -65,13 +63,10 @@
         user_name = data_utils.rand_name(name='user')
         user_password = data_utils.rand_password()
         tenant_id = None  # No default tenant so will get unscoped token.
-        email = ''
-        user = self.users_client.create_user(name=user_name,
-                                             password=user_password,
-                                             tenantId=tenant_id,
-                                             email=email)['user']
-        # Delete the user at the end of the test
-        self.addCleanup(self.users_client.delete_user, user['id'])
+        user = self.create_test_user(name=user_name,
+                                     password=user_password,
+                                     tenantId=tenant_id,
+                                     email='')
 
         # Create a couple tenants.
         tenant1_name = data_utils.rand_name(name='tenant')
diff --git a/tempest/api/identity/admin/v2/test_users.py b/tempest/api/identity/admin/v2/test_users.py
index 4d7c119..2711a2d 100644
--- a/tempest/api/identity/admin/v2/test_users.py
+++ b/tempest/api/identity/admin/v2/test_users.py
@@ -19,7 +19,6 @@
 
 from tempest.api.identity import base
 from tempest.lib.common.utils import data_utils
-from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 
 
@@ -29,7 +28,6 @@
     def resource_setup(cls):
         super(UsersTestJSON, cls).resource_setup()
         cls.alt_user = data_utils.rand_name('test_user')
-        cls.alt_password = data_utils.rand_password()
         cls.alt_email = cls.alt_user + '@testmail.tm'
 
     @decorators.attr(type='smoke')
@@ -37,12 +35,7 @@
     def test_create_user(self):
         # Create a user
         tenant = self.setup_test_tenant()
-        user = self.users_client.create_user(name=self.alt_user,
-                                             password=self.alt_password,
-                                             tenantId=tenant['id'],
-                                             email=self.alt_email)['user']
-        # Delete the User at the end of the test
-        self.addCleanup(self.users_client.delete_user, user['id'])
+        user = self.create_test_user(name=self.alt_user, tenantId=tenant['id'])
         self.assertEqual(self.alt_user, user['name'])
 
     @decorators.idempotent_id('89d9fdb8-15c2-4304-a429-48715d0af33d')
@@ -50,13 +43,10 @@
         # Create a user with enabled : False
         tenant = self.setup_test_tenant()
         name = data_utils.rand_name('test_user')
-        user = self.users_client.create_user(name=name,
-                                             password=self.alt_password,
-                                             tenantId=tenant['id'],
-                                             email=self.alt_email,
-                                             enabled=False)['user']
-        # Delete the User at the end of the test
-        self.addCleanup(self.users_client.delete_user, user['id'])
+        user = self.create_test_user(name=name,
+                                     tenantId=tenant['id'],
+                                     email=self.alt_email,
+                                     enabled=False)
         self.assertEqual(name, user['name'])
         self.assertEqual(False, user['enabled'])
         self.assertEqual(self.alt_email, user['email'])
@@ -64,14 +54,9 @@
     @decorators.idempotent_id('39d05857-e8a5-4ed4-ba83-0b52d3ab97ee')
     def test_update_user(self):
         # Test case to check if updating of user attributes is successful.
-        test_user = data_utils.rand_name('test_user')
         tenant = self.setup_test_tenant()
-        user = self.users_client.create_user(name=test_user,
-                                             password=self.alt_password,
-                                             tenantId=tenant['id'],
-                                             email=self.alt_email)['user']
-        # Delete the User at the end of this method
-        self.addCleanup(self.users_client.delete_user, user['id'])
+        user = self.create_test_user(tenantId=tenant['id'])
+
         # Updating user details with new values
         u_name2 = data_utils.rand_name('user2')
         u_email2 = u_name2 + '@testmail.tm'
@@ -91,15 +76,8 @@
     @decorators.idempotent_id('29ed26f4-a74e-4425-9a85-fdb49fa269d2')
     def test_delete_user(self):
         # Delete a user
-        test_user = data_utils.rand_name('test_user')
         tenant = self.setup_test_tenant()
-        user = self.users_client.create_user(name=test_user,
-                                             password=self.alt_password,
-                                             tenantId=tenant['id'],
-                                             email=self.alt_email)['user']
-        # Delete the User at the end of the test
-        self.addCleanup(test_utils.call_and_ignore_notfound_exc,
-                        self.users_client.delete_user, user['id'])
+        user = self.create_test_user(tenantId=tenant['id'])
         self.users_client.delete_user(user['id'])
 
     @decorators.idempotent_id('aca696c3-d645-4f45-b728-63646045beb1')
@@ -151,24 +129,10 @@
         tenant = self.setup_test_tenant()
         user_ids = list()
         fetched_user_ids = list()
-        password1 = data_utils.rand_password()
-        alt_tenant_user1 = data_utils.rand_name('tenant_user1')
-        user1 = self.users_client.create_user(name=alt_tenant_user1,
-                                              password=password1,
-                                              tenantId=tenant['id'],
-                                              email='user1@123')['user']
+        user1 = self.create_test_user(tenantId=tenant['id'])
         user_ids.append(user1['id'])
-        # Delete the User at the end of the test
-        self.addCleanup(self.users_client.delete_user, user1['id'])
-        password2 = data_utils.rand_password()
-        alt_tenant_user2 = data_utils.rand_name('tenant_user2')
-        user2 = self.users_client.create_user(name=alt_tenant_user2,
-                                              password=password2,
-                                              tenantId=tenant['id'],
-                                              email='user2@123')['user']
+        user2 = self.create_test_user(tenantId=tenant['id'])
         user_ids.append(user2['id'])
-        # Delete the User at the end of the test
-        self.addCleanup(self.users_client.delete_user, user2['id'])
         # List of users for the respective tenant ID
         body = (self.tenants_client.list_tenant_users(tenant['id'])
                 ['users'])
@@ -194,16 +158,8 @@
         role = self.roles_client.create_user_role_on_project(
             tenant['id'], user['id'], role['id'])['role']
 
-        alt_user2 = data_utils.rand_name('second_user')
-        alt_password2 = data_utils.rand_password()
-        second_user = self.users_client.create_user(
-            name=alt_user2,
-            password=alt_password2,
-            tenantId=tenant['id'],
-            email='user2@123')['user']
+        second_user = self.create_test_user(tenantId=tenant['id'])
         user_ids.append(second_user['id'])
-        # Delete the User at the end of the test
-        self.addCleanup(self.users_client.delete_user, second_user['id'])
         role = self.roles_client.create_user_role_on_project(
             tenant['id'], second_user['id'], role['id'])['role']
         # List of users with roles for the respective tenant ID
diff --git a/tempest/api/identity/admin/v3/test_groups.py b/tempest/api/identity/admin/v3/test_groups.py
index fefcb31..2694402 100644
--- a/tempest/api/identity/admin/v3/test_groups.py
+++ b/tempest/api/identity/admin/v3/test_groups.py
@@ -81,12 +81,8 @@
         # add user into group
         users = []
         for _ in range(3):
-            name = data_utils.rand_name('User')
-            password = data_utils.rand_password()
-            user = self.users_client.create_user(name=name,
-                                                 password=password)['user']
+            user = self.create_test_user()
             users.append(user)
-            self.addCleanup(self.users_client.delete_user, user['id'])
             self.groups_client.add_group_user(group['id'], user['id'])
 
         # list users in group
@@ -104,10 +100,7 @@
     @decorators.idempotent_id('64573281-d26a-4a52-b899-503cb0f4e4ec')
     def test_list_user_groups(self):
         # create a user
-        user = self.users_client.create_user(
-            name=data_utils.rand_name('User'),
-            password=data_utils.rand_password())['user']
-        self.addCleanup(self.users_client.delete_user, user['id'])
+        user = self.create_test_user()
         # create two groups, and add user into them
         groups = []
         for _ in range(2):
diff --git a/tempest/api/identity/admin/v3/test_tokens.py b/tempest/api/identity/admin/v3/test_tokens.py
index ae687f6..de4f580 100644
--- a/tempest/api/identity/admin/v3/test_tokens.py
+++ b/tempest/api/identity/admin/v3/test_tokens.py
@@ -32,12 +32,9 @@
         # Create a User
         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_password()
-        user = self.users_client.create_user(
-            name=u_name, description=u_desc, password=u_password,
-            email=u_email)['user']
-        self.addCleanup(self.users_client.delete_user, user['id'])
+        user = self.create_test_user(
+            name=u_name, description=u_desc, password=u_password)
         # Perform Authentication
         resp = self.token.auth(user_id=user['id'],
                                password=u_password).response
@@ -63,11 +60,8 @@
         """
 
         # Create a user.
-        user_name = data_utils.rand_name(name='user')
         user_password = data_utils.rand_password()
-        user = self.users_client.create_user(name=user_name,
-                                             password=user_password)['user']
-        self.addCleanup(self.users_client.delete_user, user['id'])
+        user = self.create_test_user(password=user_password)
 
         # Create a couple projects
         project1_name = data_utils.rand_name(name='project')
diff --git a/tempest/api/identity/base.py b/tempest/api/identity/base.py
index 5cb4c77..9d794b5 100644
--- a/tempest/api/identity/base.py
+++ b/tempest/api/identity/base.py
@@ -67,10 +67,14 @@
         if len(role) > 0:
             return role[0]
 
-    def _create_test_user(self, **kwargs):
+    def create_test_user(self, **kwargs):
         if kwargs.get('password', None) is None:
-            user_password = data_utils.rand_password()
-            kwargs['password'] = user_password
+            kwargs['password'] = data_utils.rand_password()
+        if 'name' not in kwargs:
+            kwargs['name'] = data_utils.rand_name('test_user')
+        if 'email' not in kwargs:
+            kwargs['email'] = kwargs['name'] + '@testmail.tm'
+
         user = self.users_client.create_user(**kwargs)['user']
         # Delete the user at the end of the test
         self.addCleanup(
@@ -145,10 +149,7 @@
     def setup_test_user(self, password=None):
         """Set up a test user."""
         tenant = self.setup_test_tenant()
-        username = data_utils.rand_name('test_user')
-        email = username + '@testmail.tm'
-        user = self._create_test_user(name=username, email=email,
-                                      tenantId=tenant['id'], password=password)
+        user = self.create_test_user(tenantId=tenant['id'], password=password)
         return user
 
     def setup_test_tenant(self):
@@ -242,11 +243,8 @@
     def setup_test_user(self, password=None):
         """Set up a test user."""
         project = self.setup_test_project()
-        username = data_utils.rand_name('test_user')
-        email = username + '@testmail.tm'
-        user = self._create_test_user(name=username, email=email,
-                                      project_id=project['id'],
-                                      password=password)
+        user = self.create_test_user(project_id=project['id'],
+                                     password=password)
         return user
 
     def setup_test_project(self):