diff --git a/neutron_tempest_plugin/api/admin/test_ports.py b/neutron_tempest_plugin/api/admin/test_ports.py
index 9c94322..6f51b1c 100644
--- a/neutron_tempest_plugin/api/admin/test_ports.py
+++ b/neutron_tempest_plugin/api/admin/test_ports.py
@@ -14,7 +14,6 @@
 #    under the License.
 
 import netaddr
-import six
 
 from neutron_lib import constants as const
 from tempest.common import utils
@@ -123,8 +122,8 @@
         self.assertIn('resource_request', port)
         vnic_trait = 'CUSTOM_VNIC_TYPE_%s' % vnic_type.upper()
         physnet_trait = 'CUSTOM_PHYSNET_%s' % self.physnet_name.upper()
-        six.assertCountEqual(self, [physnet_trait, vnic_trait],
-                             port['resource_request']['required'])
+        self.assertCountEqual([physnet_trait, vnic_trait],
+                              port['resource_request']['required'])
 
         self.assertEqual(
             {'NET_BW_EGR_KILOBIT_PER_SEC': self.EGRESS_KBPS,
diff --git a/neutron_tempest_plugin/api/admin/test_quotas.py b/neutron_tempest_plugin/api/admin/test_quotas.py
index ae773c8..0cf474e 100644
--- a/neutron_tempest_plugin/api/admin/test_quotas.py
+++ b/neutron_tempest_plugin/api/admin/test_quotas.py
@@ -13,7 +13,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import six
 from tempest.common import utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
@@ -145,7 +144,7 @@
         # as requested for tenant
         quota_set = self.admin_client.show_details_quota(tenant_id)
         quota_set = quota_set['quota']
-        for key, value in six.iteritems(new_quotas):
+        for key, value in new_quotas.items():
             self.assertEqual(new_quotas[key]['limit'],
                              quota_set[key]['limit'])
             self.assertEqual(new_quotas[key]['reserved'],
@@ -155,5 +154,5 @@
 
         # validate 'default' action for old extension
         quota_limit = self.admin_client.show_quotas(tenant_id)['quota']
-        for key, value in six.iteritems(new_quotas):
+        for key, value in new_quotas.items():
             self.assertEqual(new_quotas[key]['limit'], quota_limit[key])
diff --git a/neutron_tempest_plugin/common/ssh.py b/neutron_tempest_plugin/common/ssh.py
index fa731d8..8334521 100644
--- a/neutron_tempest_plugin/common/ssh.py
+++ b/neutron_tempest_plugin/common/ssh.py
@@ -19,7 +19,6 @@
 
 from oslo_log import log
 import paramiko
-import six
 from tempest.lib.common import ssh
 from tempest.lib import exceptions
 import tenacity
@@ -33,13 +32,7 @@
 
 
 RETRY_EXCEPTIONS = (exceptions.TimeoutException, paramiko.SSHException,
-                    socket.error)
-if six.PY2:
-    # NOTE(ralonsoh): TimeoutError was added in 3.3 and corresponds to
-    # OSError(errno.ETIMEDOUT)
-    RETRY_EXCEPTIONS += (OSError, )
-else:
-    RETRY_EXCEPTIONS += (TimeoutError, )
+                    socket.error, TimeoutError)
 
 
 class Client(ssh.Client):
@@ -293,6 +286,13 @@
                 command=shell, host=self.host, script=script, stderr=stderr,
                 stdout=stdout, exit_status=exit_status)
 
+    def get_hostname(self):
+        """Retrieve the remote machine hostname"""
+        try:
+            return self.exec_command('hostname')
+        except exceptions.SSHExecCommandFailed:
+            return self.exec_command('cat /etc/hostname')
+
 
 def _buffer_to_string(data_buffer, encoding):
     return data_buffer.decode(encoding).replace("\r\n", "\n").replace(
diff --git a/neutron_tempest_plugin/fwaas/api/test_fwaasv2_extensions.py b/neutron_tempest_plugin/fwaas/api/test_fwaasv2_extensions.py
index f085e6d..0dd18f1 100644
--- a/neutron_tempest_plugin/fwaas/api/test_fwaasv2_extensions.py
+++ b/neutron_tempest_plugin/fwaas/api/test_fwaasv2_extensions.py
@@ -13,7 +13,6 @@
 #    under the License.
 
 import netaddr
-import six
 
 from tempest.common import utils
 from tempest import config
@@ -212,7 +211,7 @@
         # show a created firewall rule
         fw_rule = self.firewall_rules_client.show_firewall_rule(
             self.fw_rule_1['id'])
-        for key, value in six.iteritems(fw_rule['firewall_rule']):
+        for key, value in fw_rule['firewall_rule'].items():
             if key != 'firewall_policy_id':
                 self.assertEqual(self.fw_rule_1[key], value)
             # This check is placed because we cannot modify policy during
@@ -258,7 +257,7 @@
         fw_policy = self.firewall_policies_client.show_firewall_policy(
             self.fw_policy_1['id'])
         fw_policy = fw_policy['firewall_policy']
-        for key, value in six.iteritems(fw_policy):
+        for key, value in fw_policy.items():
             self.assertEqual(self.fw_policy_1[key], value)
 
     @decorators.idempotent_id('48dfcd75-3924-479d-bb65-b3ed33397663')
@@ -283,7 +282,7 @@
             fwg_id)
         fwg = firewall_group['firewall_group']
 
-        for key, value in six.iteritems(fwg):
+        for key, value in fwg.items():
             if key == 'status':
                 continue
             self.assertEqual(created_firewall_group[key], value)
diff --git a/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base.py b/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base.py
index f752436..b4be57b 100644
--- a/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base.py
+++ b/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base.py
@@ -19,7 +19,6 @@
 import time
 
 import netaddr
-import six
 
 from os_ken.tests.integrated.common import docker_base as ctn_base
 from tempest.common import utils
@@ -125,10 +124,10 @@
         while True:
             with self.lock:
                 try:
-                    yield (i, str(six.next(subnet_gen)))
+                    yield (i, str(next(subnet_gen)))
                 except StopIteration:
                     subnet_gen = netaddr.iter_iprange(start, end, step=step)
-                    yield (i, str(six.next(subnet_gen)))
+                    yield (i, str(next(subnet_gen)))
                 i += 1
 
     def net_resource_cleanup(self):
diff --git a/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base_test_proto.py b/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base_test_proto.py
index 1bcf5b1..643620f 100644
--- a/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base_test_proto.py
+++ b/neutron_tempest_plugin/neutron_dynamic_routing/scenario/base_test_proto.py
@@ -14,7 +14,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import six
 from tempest import config
 
 from neutron_tempest_plugin.neutron_dynamic_routing.scenario import base
@@ -28,7 +27,7 @@
 
     def _test_check_neighbor_established(self, ip_version):
         self.bgp_peer_args[0]['peer_ip'] = self.r_as_ip[0].split('/')[0]
-        num, subnet = six.next(self.tnet_gen)
+        num, subnet = next(self.tnet_gen)
         mask = '/' + str(self.TPool.prefixlen)
         TNet = base.Net(name='', net=subnet, mask=self.TPool.prefixlen,
                         cidr=subnet + mask, router=None)
@@ -47,7 +46,7 @@
 
     def _test_check_advertised_tenant_network(self, ip_version):
         self.bgp_peer_args[0]['peer_ip'] = self.r_as_ip[0].split('/')[0]
-        num, subnet = six.next(self.tnet_gen)
+        num, subnet = next(self.tnet_gen)
         mask = '/' + str(self.TPool.prefixlen)
         TNet = base.Net(name='', net=subnet, mask=self.TPool.prefixlen,
                         cidr=subnet + mask, router=None)
@@ -73,7 +72,7 @@
         tnets = []
         tnets_cidr = []
         for i in range(0, 3):
-            num, subnet = six.next(self.tnet_gen)
+            num, subnet = next(self.tnet_gen)
             mask = '/' + str(self.TPool.prefixlen)
             TNet = base.Net(name='', net=subnet, mask=self.TPool.prefixlen,
                             cidr=subnet + mask, router=None)
@@ -102,7 +101,7 @@
         for (bgp_peer_args, r_as_ip) in zip(self.bgp_peer_args,
                                             self.r_as_ip):
             bgp_peer_args['peer_ip'] = r_as_ip.split('/')[0]
-        num, subnet = six.next(self.tnet_gen)
+        num, subnet = next(self.tnet_gen)
         mask = '/' + str(self.TPool.prefixlen)
         TNet = base.Net(name='', net=subnet, mask=self.TPool.prefixlen,
                         cidr=subnet + mask, router=None)
@@ -124,7 +123,7 @@
         for (bgp_peer_args, r_as_ip) in zip(self.bgp_peer_args,
                                             self.r_as_ip):
             bgp_peer_args['peer_ip'] = r_as_ip.split('/')[0]
-        num, subnet = six.next(self.tnet_gen)
+        num, subnet = next(self.tnet_gen)
         mask = '/' + str(self.TPool.prefixlen)
         TNet = base.Net(name='', net=subnet, mask=self.TPool.prefixlen,
                         cidr=subnet + mask, router=None)
diff --git a/neutron_tempest_plugin/neutron_dynamic_routing/scenario/basic/test_basic.py b/neutron_tempest_plugin/neutron_dynamic_routing/scenario/basic/test_basic.py
index 1c680f9..90a6815 100644
--- a/neutron_tempest_plugin/neutron_dynamic_routing/scenario/basic/test_basic.py
+++ b/neutron_tempest_plugin/neutron_dynamic_routing/scenario/basic/test_basic.py
@@ -15,7 +15,6 @@
 #    under the License.
 
 from os_ken.tests.integrated.common import docker_base as ctn_base
-import six
 from tempest import config
 from tempest.lib import decorators
 
@@ -31,7 +30,7 @@
     @decorators.idempotent_id('cc615252-c6cb-4d75-a70e-608fb2c3736a')
     def test_schedule_added_speaker(self):
         self.bgp_peer_args[0]['peer_ip'] = self.r_as_ip[0].split('/')[0]
-        num, subnet = six.next(self.tnet_gen)
+        num, subnet = next(self.tnet_gen)
         mask = '/' + str(self.TPool.prefixlen)
         TNet = s_base.Net(name='', net=subnet, mask=self.TPool.prefixlen,
                           cidr=subnet + mask, router=None)
@@ -51,7 +50,7 @@
     @decorators.idempotent_id('ce98c33c-0ffa-49ae-b365-da836406793b')
     def test_unschedule_deleted_speaker(self):
         self.bgp_peer_args[0]['peer_ip'] = self.r_as_ip[0].split('/')[0]
-        num, subnet = six.next(self.tnet_gen)
+        num, subnet = next(self.tnet_gen)
         mask = '/' + str(self.TPool.prefixlen)
         TNet = s_base.Net(name='', net=subnet, mask=self.TPool.prefixlen,
                           cidr=subnet + mask, router=None)
@@ -77,7 +76,7 @@
     @decorators.idempotent_id('aa6c565c-ded3-413b-8dc9-3928b3b0e38f')
     def test_remove_add_speaker_agent(self):
         self.bgp_peer_args[0]['peer_ip'] = self.r_as_ip[0].split('/')[0]
-        num, subnet = six.next(self.tnet_gen)
+        num, subnet = next(self.tnet_gen)
         mask = '/' + str(self.TPool.prefixlen)
         TNet = s_base.Net(name='', net=subnet, mask=self.TPool.prefixlen,
                           cidr=subnet + mask, router=None)
diff --git a/neutron_tempest_plugin/scenario/base.py b/neutron_tempest_plugin/scenario/base.py
index 2eb45f8..752e536 100644
--- a/neutron_tempest_plugin/scenario/base.py
+++ b/neutron_tempest_plugin/scenario/base.py
@@ -264,10 +264,12 @@
                                                'server']['id'])['ports'][0]
         self.fip = self.create_floatingip(port=self.port)
 
-    def check_connectivity(self, host, ssh_user, ssh_key,
-                           servers=None, ssh_timeout=None):
-        ssh_client = ssh.Client(host, ssh_user,
-                                pkey=ssh_key, timeout=ssh_timeout)
+    def check_connectivity(self, host, ssh_user=None, ssh_key=None,
+                           servers=None, ssh_timeout=None, ssh_client=None):
+        # Either ssh_client or ssh_user+ssh_key is mandatory.
+        if ssh_client is None:
+            ssh_client = ssh.Client(host, ssh_user,
+                                    pkey=ssh_key, timeout=ssh_timeout)
         try:
             ssh_client.test_connection_auth()
         except (lib_exc.SSHTimeout, ssh_exc.AuthenticationException) as ssh_e:
@@ -305,13 +307,19 @@
             self._log_ns_network_status(ns_name=ns_name)
 
     def _log_ns_network_status(self, ns_name=None):
-        local_ips = ip_utils.IPCommand(namespace=ns_name).list_addresses()
+        try:
+            local_ips = ip_utils.IPCommand(namespace=ns_name).list_addresses()
+            local_routes = ip_utils.IPCommand(namespace=ns_name).list_routes()
+            arp_table = ip_utils.arp_table()
+        except exceptions.ShellCommandFailed:
+            LOG.debug('Namespace %s has been deleted synchronously during the '
+                      'host network collection process', ns_name)
+            return
+
         LOG.debug('Namespace %s; IP Addresses:\n%s',
                   ns_name, '\n'.join(str(r) for r in local_ips))
-        local_routes = ip_utils.IPCommand(namespace=ns_name).list_routes()
         LOG.debug('Namespace %s; Local routes:\n%s',
                   ns_name, '\n'.join(str(r) for r in local_routes))
-        arp_table = ip_utils.arp_table()
         LOG.debug('Namespace %s; Local ARP table:\n%s',
                   ns_name, '\n'.join(str(r) for r in arp_table))
 
@@ -473,7 +481,7 @@
     def wait_for_guest_os_ready(self, server, client=None):
         if not CONF.compute_feature_enabled.console_output:
             LOG.debug('Console output not supported, cannot check if server '
-                      '%s is ready.', server['server']['id'])
+                      '%s is ready.', server['id'])
             return
 
         client = client or self.os_primary.servers_client
@@ -511,7 +519,7 @@
                     pkey=self.keypair['private_key'],
                     **kwargs)
                 self.assertIn(server['name'],
-                              ssh_client.exec_command('hostname'))
+                              ssh_client.get_hostname())
         except (lib_exc.SSHTimeout, ssh_exc.AuthenticationException) as ssh_e:
             LOG.debug(ssh_e)
             if log_errors:
diff --git a/neutron_tempest_plugin/scenario/test_dhcp.py b/neutron_tempest_plugin/scenario/test_dhcp.py
new file mode 100644
index 0000000..b95eaa2
--- /dev/null
+++ b/neutron_tempest_plugin/scenario/test_dhcp.py
@@ -0,0 +1,94 @@
+# 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 oslo_log import log
+from paramiko import ssh_exception as ssh_exc
+from tempest.common import utils
+from tempest.lib.common.utils import data_utils
+from tempest.lib import decorators
+from tempest.lib import exceptions as lib_exc
+
+from neutron_tempest_plugin.common import ssh
+from neutron_tempest_plugin import config
+from neutron_tempest_plugin.scenario import base
+
+CONF = config.CONF
+LOG = log.getLogger(__name__)
+
+
+class DHCPTest(base.BaseTempestTestCase):
+
+    credentials = ['primary', 'admin']
+    force_tenant_isolation = False
+
+    @classmethod
+    def resource_setup(cls):
+        super(DHCPTest, cls).resource_setup()
+        cls.rand_name = data_utils.rand_name(
+            cls.__name__.rsplit('.', 1)[-1])
+        cls.network = cls.create_network(name=cls.rand_name)
+        cls.subnet = cls.create_subnet(
+            network=cls.network, name=cls.rand_name)
+        cls.router = cls.create_router_by_client()
+        cls.create_router_interface(cls.router['id'], cls.subnet['id'])
+        cls.keypair = cls.create_keypair(name=cls.rand_name)
+        cls.security_group = cls.create_security_group(name=cls.rand_name)
+        cls.create_loginable_secgroup_rule(cls.security_group['id'])
+
+    @utils.requires_ext(extension='extra_dhcp_opt', service='network')
+    @decorators.idempotent_id('58f7c094-1980-4e03-b0d3-6c4dd27217b1')
+    def test_extra_dhcp_opts(self):
+        """This test case tests DHCP extra options configured for Neutron port.
+
+        Test is checking just extra option "15" which is domain-name
+        according to the RFC 2132:
+        https://tools.ietf.org/html/rfc2132#section-5.3
+
+        To test that option, there is spawned VM connected to the port with
+        configured extra_dhcp_opts and test asserts that search domain name is
+        configured inside VM in /etc/resolv.conf file
+        """
+
+        test_domain = "test.domain"
+        extra_dhcp_opts = [
+            {'opt_name': 'domain-name',
+             'opt_value': '"%s"' % test_domain}]
+        port = self.create_port(
+            network=self.network, name=self.rand_name,
+            security_groups=[self.security_group['id']],
+            extra_dhcp_opts=extra_dhcp_opts)
+        floating_ip = self.create_floatingip(port=port)
+
+        server = self.create_server(
+            flavor_ref=CONF.compute.flavor_ref,
+            image_ref=CONF.compute.image_ref,
+            key_name=self.keypair['name'],
+            networks=[{'port': port['id']}])
+        self.wait_for_server_active(server['server'])
+        self.wait_for_guest_os_ready(server['server'])
+
+        try:
+            ssh_client = ssh.Client(
+                floating_ip['floating_ip_address'],
+                CONF.validation.image_ssh_user,
+                pkey=self.keypair['private_key'])
+            vm_resolv_conf = ssh_client.exec_command(
+                "cat /etc/resolv.conf")
+            self.assertIn(test_domain, vm_resolv_conf)
+        except (lib_exc.SSHTimeout,
+                ssh_exc.AuthenticationException,
+                AssertionError) as error:
+            LOG.debug(error)
+            self._log_console_output([server])
+            self._log_local_network_status()
+            raise
diff --git a/neutron_tempest_plugin/scenario/test_floatingip.py b/neutron_tempest_plugin/scenario/test_floatingip.py
index 8c8d163..262f429 100644
--- a/neutron_tempest_plugin/scenario/test_floatingip.py
+++ b/neutron_tempest_plugin/scenario/test_floatingip.py
@@ -341,6 +341,15 @@
     def resource_setup(cls):
         super(FloatingIPQosTest, cls).resource_setup()
 
+    def skip_if_no_extension_enabled_in_l3_agents(self, extension):
+        l3_agents = self.os_admin.network_client.list_agents(
+                binary='neutron-l3-agent')['agents']
+        for agent in l3_agents:
+            if extension in agent['configurations'].get('extensions', []):
+                return
+        raise self.skipTest("No L3 agent with '%s' extension enabled found." %
+                            extension)
+
     @decorators.idempotent_id('5eb48aea-eaba-4c20-8a6f-7740070a0aa3')
     def test_qos(self):
         """Test floating IP is binding to a QoS policy with
@@ -351,6 +360,8 @@
            received / elapsed time.
         """
 
+        self.skip_if_no_extension_enabled_in_l3_agents("fip_qos")
+
         self._test_basic_resources()
         policy_id = self._create_qos_policy()
         ssh_client = self._create_ssh_client()
diff --git a/neutron_tempest_plugin/scenario/test_internal_dns.py b/neutron_tempest_plugin/scenario/test_internal_dns.py
index c620233..406af3d 100644
--- a/neutron_tempest_plugin/scenario/test_internal_dns.py
+++ b/neutron_tempest_plugin/scenario/test_internal_dns.py
@@ -59,7 +59,7 @@
             CONF.validation.image_ssh_user,
             pkey=self.keypair['private_key'])
 
-        self.assertIn('luke', ssh_client.exec_command('hostname'))
+        self.assertIn('luke', ssh_client.get_hostname())
 
         leia_port = self.client.list_ports(
             network_id=self.network['id'],
diff --git a/neutron_tempest_plugin/scenario/test_port_forwardings.py b/neutron_tempest_plugin/scenario/test_port_forwardings.py
index fb6410c..a4711ae 100644
--- a/neutron_tempest_plugin/scenario/test_port_forwardings.py
+++ b/neutron_tempest_plugin/scenario/test_port_forwardings.py
@@ -120,7 +120,6 @@
                 lambda: _message_received(server, ssh_client, expected_msg),
                 **wait_params)
 
-    @test.unstable_test("bug 1896735")
     @decorators.idempotent_id('ab40fc48-ca8d-41a0-b2a3-f6679c847bfe')
     def test_port_forwarding_to_2_servers(self):
         servers = self._prepare_resources(num_servers=2,
@@ -130,7 +129,6 @@
         # And now test UDP port forwarding using nc
         self._test_udp_port_forwarding(servers)
 
-    @test.unstable_test("bug 1896735")
     @decorators.idempotent_id('aa19d46c-a4a6-11ea-bb37-0242ac130002')
     def test_port_forwarding_editing_and_deleting_tcp_rule(self):
         test_ext_port = 3333
diff --git a/neutron_tempest_plugin/scenario/test_trunk.py b/neutron_tempest_plugin/scenario/test_trunk.py
index 03bdd11..8f260ea 100644
--- a/neutron_tempest_plugin/scenario/test_trunk.py
+++ b/neutron_tempest_plugin/scenario/test_trunk.py
@@ -15,6 +15,7 @@
 import collections
 
 from neutron_lib import constants
+from neutron_lib.utils import test
 from oslo_log import log as logging
 from tempest.common import utils as tutils
 from tempest.lib.common.utils import data_utils
@@ -246,6 +247,7 @@
             self._wait_for_trunk(vm.trunk)
             self._assert_has_ssh_connectivity(vm1.ssh_client)
 
+    @test.unstable_test("bug 1897796")
     @testtools.skipUnless(
         (CONF.neutron_plugin_options.advanced_image_ref or
          CONF.neutron_plugin_options.default_image_is_advanced),
@@ -269,6 +271,9 @@
             use_advanced_image=use_advanced_image)
 
         for vm in [vm1, vm2]:
+            self.check_connectivity(
+                host=vm.floating_ip['floating_ip_address'],
+                ssh_client=vm.ssh_client)
             self._configure_vlan_subport(vm=vm,
                                          vlan_tag=vlan_tag,
                                          vlan_subnet=vlan_subnet)
diff --git a/neutron_tempest_plugin/services/network/json/network_client.py b/neutron_tempest_plugin/services/network/json/network_client.py
index 0b2544b..e733cd0 100644
--- a/neutron_tempest_plugin/services/network/json/network_client.py
+++ b/neutron_tempest_plugin/services/network/json/network_client.py
@@ -11,9 +11,9 @@
 #    under the License.
 
 import time
+from urllib import parse as urlparse
 
 from oslo_serialization import jsonutils
-from six.moves.urllib import parse as urlparse
 from tempest.lib.common import rest_client as service_client
 from tempest.lib import exceptions as lib_exc
 
diff --git a/requirements.txt b/requirements.txt
index 3edf7dc..47dd923 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,6 @@
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0
 paramiko>=2.0.0 # LGPLv2.1+
-six>=1.10.0 # MIT
 tempest>=17.1.0 # Apache-2.0
 tenacity>=3.2.1 # Apache-2.0
 ddt>=1.0.1 # MIT
diff --git a/tox.ini b/tox.ini
index eecd16e..3c18fbf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,7 +14,7 @@
    OS_STDOUT_CAPTURE={env:OS_STDOUT_CAPTURE:true}
    OS_STDERR_CAPTURE={env:OS_STDERR_CAPTURE:true}
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/test-requirements.txt
 commands = stestr run --slowest {posargs}
 
diff --git a/zuul.d/base.yaml b/zuul.d/base.yaml
index 2bd6f5a..cc1479b 100644
--- a/zuul.d/base.yaml
+++ b/zuul.d/base.yaml
@@ -25,7 +25,6 @@
       tempest_plugins:
         - neutron-tempest-plugin
       devstack_services:
-        tls-proxy: false
         tempest: true
         neutron-dns: true
         neutron-qos: true
@@ -38,6 +37,12 @@
         neutron-tag-ports-during-bulk-creation: true
         br-ex-tcpdump: true
         br-int-flows: true
+        # Cinder services
+        c-api: false
+        c-bak: false
+        c-sch: false
+        c-vol: false
+        cinder: false
         # We don't need Swift to be run in the Neutron jobs
         s-account: false
         s-container: false
@@ -69,11 +74,6 @@
           $NEUTRON_DHCP_CONF:
             agent:
               availability_zone: nova
-          /etc/neutron/api-paste.ini:
-            composite:neutronapi_v2_0:
-              use: call:neutron.auth:pipeline_factory
-              noauth: cors request_id catch_errors osprofiler extensions neutronapiapp_v2_0
-              keystone: cors request_id catch_errors osprofiler authtoken keystonecontext extensions neutronapiapp_v2_0
         test-config:
           $TEMPEST_CONFIG:
             neutron_plugin_options:
@@ -104,7 +104,10 @@
       # default test timeout set to 1200 seconds may be not enough if job is
       # run on slow node
       tempest_test_timeout: 2400
-      tempest_test_regex: ^neutron_tempest_plugin\.scenario
+      tempest_test_regex: "\
+          (^neutron_tempest_plugin.scenario)|\
+          (^tempest.api.compute.servers.test_attach_interfaces)|\
+          (^tempest.api.compute.servers.test_multiple_create)"
       devstack_localrc:
         PHYSICAL_NETWORK: default
         CIRROS_VERSION: 0.5.1
@@ -113,6 +116,4 @@
         ADVANCED_INSTANCE_TYPE: ds512M
         ADVANCED_INSTANCE_USER: ubuntu
         BUILD_TIMEOUT: 784
-      devstack_services:
-        cinder: true
-
+      tempest_concurrency: 3  # out of 4
diff --git a/zuul.d/master_jobs.yaml b/zuul.d/master_jobs.yaml
index 626fc99..1c50b57 100644
--- a/zuul.d/master_jobs.yaml
+++ b/zuul.d/master_jobs.yaml
@@ -207,9 +207,12 @@
       # TODO(slaweq): Remove test_trunk_subport_lifecycle test from the
       # blacklist when bug https://bugs.launchpad.net/neutron/+bug/1885900 will
       # be fixed
+      # TODO(jlibosva): Remove the NetworkWritableMtuTest test from the list
+      # once east/west fragmentation is supported in core OVN
       tempest_black_regex: "\
           (?:neutron_tempest_plugin.scenario.test_ipv6.IPv6Test)|\
-          (^neutron_tempest_plugin.scenario.test_trunk.TrunkTest.test_trunk_subport_lifecycle)"
+          (^neutron_tempest_plugin.scenario.test_trunk.TrunkTest.test_trunk_subport_lifecycle)|\
+          (^neutron_tempest_plugin.scenario.test_mtu.NetworkWritableMtuTest)"
       devstack_localrc:
         Q_AGENT: ovn
         NETWORK_API_EXTENSIONS: "{{ network_api_extensions | join(',') }}"
@@ -236,13 +239,19 @@
         q-l3: false
         q-meta: false
         q-metering: false
+        q-qos: true
+        tls-proxy: true
+        # Cinder services
+        c-api: false
+        c-bak: false
+        c-sch: false
+        c-vol: false
+        cinder: false
         s-account: false
         s-container-sync: false
         s-container: false
         s-object: false
         s-proxy: false
-        tls-proxy: true
-        q-qos: true
       devstack_local_conf:
         post-config:
           $NEUTRON_CONF:
@@ -308,7 +317,12 @@
         neutron-trunk: true
         neutron-log: true
         neutron-port-forwarding: true
-        cinder: true
+        # Cinder services
+        c-api: false
+        c-bak: false
+        c-sch: false
+        c-vol: false
+        cinder: false
         # We don't need Swift to be run in the Neutron jobs
         s-account: false
         s-container: false
@@ -378,6 +392,9 @@
           neutron-trunk: true
           neutron-log: true
           neutron-port-forwarding: true
+          # Cinder services
+          c-bak: false
+          c-vol: false
           # We don't need Swift to be run in the Neutron jobs
           s-account: false
           s-container: false