diff --git a/doc/source/index.rst b/doc/source/index.rst
index 7acfd62..ab994d1 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -48,6 +48,14 @@
    workspace
    run
 
+Supported OpenStack Releases and Python Versions
+------------------------------------------------
+
+.. toctree::
+   :maxdepth: 1
+
+   supported_version
+
 Developers Guide
 ================
 
diff --git a/doc/source/supported_version.rst b/doc/source/supported_version.rst
new file mode 100644
index 0000000..60e7b97
--- /dev/null
+++ b/doc/source/supported_version.rst
@@ -0,0 +1,37 @@
+Supported OpenStack Releases and Python Versions
+================================================
+
+This Document list the officially supported OpenStack releases
+and python versions by Tempest.
+
+Compatible OpenStack Releases
+-----------------------------
+
+Tempest master supports the below OpenStack Releases:
+
+* Train
+* Stein
+* Rocky
+
+For older OpenStack Release:
+
+For any older OpenStack Release than the listed above, Tempest master might work. But if
+Tempest master starts failing then, you can use the respective Tempest tag listed in OpenStack
+release page.
+
+For example: OpenStack Stein: Tempest 20.0.0
+
+* https://releases.openstack.org/stein/index.html#stein-tempest
+
+How to use Tempest tag on Extended Maintenance stable branch:
+* https://review.opendev.org/#/c/681950/
+
+Supported Python Versions
+-------------------------
+
+Tempest master supports the below python versions:
+
+* Python 2.7
+* Python 3.5
+* Python 3.6
+* Python 3.7
diff --git a/releasenotes/source/index.rst b/releasenotes/source/index.rst
index 611979d..bfd8b2d 100644
--- a/releasenotes/source/index.rst
+++ b/releasenotes/source/index.rst
@@ -6,6 +6,7 @@
    :maxdepth: 1
 
    unreleased
+   v23.0.0
    v22.1.0
    v22.0.0
    v21.0.0
diff --git a/releasenotes/source/v23.0.0.rst b/releasenotes/source/v23.0.0.rst
new file mode 100644
index 0000000..7c5edf8
--- /dev/null
+++ b/releasenotes/source/v23.0.0.rst
@@ -0,0 +1,6 @@
+=====================
+v23.0.0 Release Notes
+=====================
+
+.. release-notes:: 23.0.0 Release Notes
+   :version: 23.0.0
diff --git a/tempest/api/compute/admin/test_security_group_default_rules.py b/tempest/api/compute/admin/test_security_group_default_rules.py
deleted file mode 100644
index bca6a22..0000000
--- a/tempest/api/compute/admin/test_security_group_default_rules.py
+++ /dev/null
@@ -1,132 +0,0 @@
-# Copyright 2014 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.
-
-import testtools
-
-from tempest.api.compute import base
-from tempest import config
-from tempest.lib import decorators
-from tempest.lib import exceptions as lib_exc
-
-CONF = config.CONF
-
-
-class SecurityGroupDefaultRulesTest(base.BaseV2ComputeAdminTest):
-    max_microversion = '2.35'
-
-    @classmethod
-    # TODO(GMann): Once Bug# 1311500 is fixed, these test can run
-    # for Neutron also.
-    @testtools.skipIf(CONF.service_available.neutron,
-                      "Skip as this functionality is not yet "
-                      "implemented in Neutron. Related Bug#1311500")
-    def setup_credentials(cls):
-        # A network and a subnet will be created for these tests
-        cls.set_network_resources(network=True, subnet=True)
-        super(SecurityGroupDefaultRulesTest, cls).setup_credentials()
-
-    @classmethod
-    def setup_clients(cls):
-        super(SecurityGroupDefaultRulesTest, cls).setup_clients()
-        cls.adm_client = cls.os_admin.security_group_default_rules_client
-
-    def _create_security_group_default_rules(self, ip_protocol='tcp',
-                                             from_port=22, to_port=22,
-                                             cidr='10.10.0.0/24'):
-        # Create Security Group default rule
-        rule = self.adm_client.create_security_default_group_rule(
-            ip_protocol=ip_protocol,
-            from_port=from_port,
-            to_port=to_port,
-            cidr=cidr)['security_group_default_rule']
-        self.assertEqual(ip_protocol, rule['ip_protocol'])
-        self.assertEqual(from_port, rule['from_port'])
-        self.assertEqual(to_port, rule['to_port'])
-        self.assertEqual(cidr, rule['ip_range']['cidr'])
-        return rule
-
-    @decorators.idempotent_id('6d880615-eec3-4d29-97c5-7a074dde239d')
-    def test_create_delete_security_group_default_rules(self):
-        # Create and delete Security Group default rule
-        ip_protocols = ['tcp', 'udp', 'icmp']
-        for ip_protocol in ip_protocols:
-            rule = self._create_security_group_default_rules(ip_protocol)
-            # Delete Security Group default rule
-            self.adm_client.delete_security_group_default_rule(rule['id'])
-            self.assertRaises(lib_exc.NotFound,
-                              self.adm_client.show_security_group_default_rule,
-                              rule['id'])
-
-    @decorators.idempotent_id('4d752e0a-33a1-4c3a-b498-ff8667ca22e5')
-    def test_create_security_group_default_rule_without_cidr(self):
-        ip_protocol = 'udp'
-        from_port = 80
-        to_port = 80
-        rule = self.adm_client.create_security_default_group_rule(
-            ip_protocol=ip_protocol,
-            from_port=from_port,
-            to_port=to_port)['security_group_default_rule']
-        self.addCleanup(self.adm_client.delete_security_group_default_rule,
-                        rule['id'])
-        self.assertNotEqual(0, rule['id'])
-        self.assertEqual('0.0.0.0/0', rule['ip_range']['cidr'])
-
-    @decorators.idempotent_id('29f2d218-69b0-4a95-8f3d-6bd0ef732b3a')
-    def test_create_security_group_default_rule_with_blank_cidr(self):
-        ip_protocol = 'icmp'
-        from_port = 10
-        to_port = 10
-        cidr = ''
-        rule = self.adm_client.create_security_default_group_rule(
-            ip_protocol=ip_protocol,
-            from_port=from_port,
-            to_port=to_port,
-            cidr=cidr)['security_group_default_rule']
-        self.addCleanup(self.adm_client.delete_security_group_default_rule,
-                        rule['id'])
-        self.assertNotEqual(0, rule['id'])
-        self.assertEqual('0.0.0.0/0', rule['ip_range']['cidr'])
-
-    @decorators.idempotent_id('6e6de55e-9146-4ae0-89f2-3569586e0b9b')
-    def test_security_group_default_rules_list(self):
-        ip_protocol = 'tcp'
-        from_port = 22
-        to_port = 22
-        cidr = '10.10.0.0/24'
-        rule = self._create_security_group_default_rules(ip_protocol,
-                                                         from_port,
-                                                         to_port,
-                                                         cidr)
-        self.addCleanup(self.adm_client.delete_security_group_default_rule,
-                        rule['id'])
-        rules = (self.adm_client.list_security_group_default_rules()
-                 ['security_group_default_rules'])
-        self.assertNotEmpty(rules)
-        self.assertIn(rule, rules)
-
-    @decorators.idempotent_id('15cbb349-86b4-4f71-a048-04b7ef3f150b')
-    def test_default_security_group_default_rule_show(self):
-        ip_protocol = 'tcp'
-        from_port = 22
-        to_port = 22
-        cidr = '10.10.0.0/24'
-        rule = self._create_security_group_default_rules(ip_protocol,
-                                                         from_port,
-                                                         to_port,
-                                                         cidr)
-        self.addCleanup(self.adm_client.delete_security_group_default_rule,
-                        rule['id'])
-        fetched_rule = self.adm_client.show_security_group_default_rule(
-            rule['id'])['security_group_default_rule']
-        self.assertEqual(rule, fetched_rule)