diff --git a/neutron_tempest_plugin/api/test_ports.py b/neutron_tempest_plugin/api/test_ports.py
index c59ee83..f1dfe5c 100644
--- a/neutron_tempest_plugin/api/test_ports.py
+++ b/neutron_tempest_plugin/api/test_ports.py
@@ -15,6 +15,7 @@
 
 import copy
 
+from neutron_lib import constants as lib_constants
 from tempest.common import utils
 from tempest.lib import decorators
 
@@ -60,6 +61,20 @@
         body = self.client.list_ports(id=body['port']['id'])['ports'][0]
         self.assertEqual('d2', body['description'])
 
+    @decorators.idempotent_id('3ae162e8-ff00-490c-a423-6a88e48f1ed6')
+    def test_create_update_port_security(self):
+        body = self.create_port(self.network,
+                                port_security_enabled=True)
+        self.assertTrue(body['port_security_enabled'])
+        body = self.client.list_ports(id=body['id'])['ports'][0]
+        self.assertTrue(body['port_security_enabled'])
+        body = self.client.update_port(body['id'],
+                                       port_security_enabled=False,
+                                       security_groups=[])
+        self.assertFalse(body['port']['port_security_enabled'])
+        body = self.client.list_ports(id=body['port']['id'])['ports'][0]
+        self.assertFalse(body['port_security_enabled'])
+
     @decorators.idempotent_id('539fbefe-fb36-48aa-9a53-8c5fbd44e492')
     @utils.requires_ext(extension="dns-integration",
                        service="network")
@@ -137,6 +152,28 @@
         self.assertEqual(expected, subnets)
 
 
+class PortsIpv6TestJSON(base.BaseNetworkTest):
+
+    _ip_version = lib_constants.IP_VERSION_6
+
+    @classmethod
+    def resource_setup(cls):
+        super(PortsIpv6TestJSON, cls).resource_setup()
+        cls.network = cls.create_network()
+
+    @decorators.idempotent_id('b85879fb-4852-4b99-aa32-3f8a7a6a3f01')
+    def test_add_ipv6_ips_to_port(self):
+        s = self.create_subnet(self.network, ip_version=self._ip_version)
+        port = self.create_port(self.network)
+        # request another IP on the same subnet
+        port['fixed_ips'].append({'subnet_id': s['id']})
+        updated = self.client.update_port(port['id'],
+                                          fixed_ips=port['fixed_ips'])
+        subnets = [ip['subnet_id'] for ip in updated['port']['fixed_ips']]
+        expected = [s['id'], s['id']]
+        self.assertEqual(expected, subnets)
+
+
 class PortsSearchCriteriaTest(base.BaseSearchCriteriaTest):
 
     resource = 'port'
diff --git a/neutron_tempest_plugin/api/test_qos_negative.py b/neutron_tempest_plugin/api/test_qos_negative.py
index 8432c6a..f6c4afc 100644
--- a/neutron_tempest_plugin/api/test_qos_negative.py
+++ b/neutron_tempest_plugin/api/test_qos_negative.py
@@ -67,6 +67,28 @@
                           self.client.update_qos_policy, policy['id'],
                           description=LONG_DESCRIPTION_NG)
 
+    @decorators.attr(type='negative')
+    @decorators.idempotent_id('88b54ab0-804b-446c-bc19-8e54222d70ef')
+    def test_get_non_existent_qos_policy(self):
+        non_exist_id = data_utils.rand_name('qos_policy')
+        self.assertRaises(lib_exc.NotFound,
+                          self.admin_client.show_qos_policy, non_exist_id)
+
+    @decorators.attr(type='negative')
+    @decorators.idempotent_id('21050859-1284-4bf5-b05a-13846f83988f')
+    def test_update_non_existent_qos_policy(self):
+        non_exist_id = data_utils.rand_name('qos_policy')
+        self.assertRaises(lib_exc.NotFound,
+                          self.admin_client.update_qos_policy, non_exist_id,
+                          shared=False)
+
+    @decorators.attr(type='negative')
+    @decorators.idempotent_id('09e435b7-44d3-4f9d-8aa8-c295d46b5866')
+    def test_delete_non_existent_qos_policy(self):
+        non_exist_id = data_utils.rand_name('qos_policy')
+        self.assertRaises(lib_exc.NotFound,
+                          self.admin_client.delete_qos_policy, non_exist_id)
+
 
 class QosBandwidthLimitRuleNegativeTestJSON(base.BaseAdminNetworkTest):
 
diff --git a/neutron_tempest_plugin/api/test_routers_negative.py b/neutron_tempest_plugin/api/test_routers_negative.py
index 8700761..86d58e2 100644
--- a/neutron_tempest_plugin/api/test_routers_negative.py
+++ b/neutron_tempest_plugin/api/test_routers_negative.py
@@ -19,6 +19,10 @@
 import testtools
 
 from neutron_tempest_plugin.api import base_routers as base
+from neutron_tempest_plugin import config
+
+
+CONF = config.CONF
 
 
 class RoutersNegativeTestBase(base.BaseRouterTest):
@@ -88,6 +92,23 @@
             self.client.add_router_interface_with_port_id,
             self.router['id'], invalid_id)
 
+    @decorators.attr(type='negative')
+    @decorators.idempotent_id('dad7a8ba-2726-11eb-82dd-74e5f9e2a801')
+    def test_remove_associated_ports(self):
+        self.client.update_router(
+            self.router['id'],
+            external_gateway_info={
+                'network_id': CONF.network.public_network_id})
+        network = self.create_network()
+        subnet = self.create_subnet(network)
+        self.create_router_interface(self.router['id'], subnet['id'])
+        port_ids = [
+            item['id'] for item in self.admin_client.list_ports(
+                device_id=self.router['id'])['ports']]
+        for port_id in port_ids:
+            with testtools.ExpectedException(lib_exc.Conflict):
+                self.admin_client.delete_port(port_id)
+
 
 class DvrRoutersNegativeTest(RoutersNegativeTestBase):
 
diff --git a/neutron_tempest_plugin/scenario/base.py b/neutron_tempest_plugin/scenario/base.py
index 752e536..127701c 100644
--- a/neutron_tempest_plugin/scenario/base.py
+++ b/neutron_tempest_plugin/scenario/base.py
@@ -205,7 +205,6 @@
         else:
             router = cls.create_admin_router(**kwargs)
         LOG.debug("Created router %s", router['name'])
-        cls.routers.append(router)
         return router
 
     @removals.remove(version='Stein',
diff --git a/neutron_tempest_plugin/scenario/test_ports.py b/neutron_tempest_plugin/scenario/test_ports.py
index 3b0408a..b3aeb87 100644
--- a/neutron_tempest_plugin/scenario/test_ports.py
+++ b/neutron_tempest_plugin/scenario/test_ports.py
@@ -12,6 +12,9 @@
 #    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 ipaddress
+
+from oslo_log import log as logging
 from tempest.common import waiters
 from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
@@ -20,6 +23,7 @@
 from neutron_tempest_plugin.scenario import base
 from neutron_tempest_plugin.scenario import constants as const
 
+LOG = logging.getLogger(__name__)
 CONF = config.CONF
 
 
@@ -78,3 +82,34 @@
                 self.os_primary.servers_client,
                 servers[0]['server']['id'])
             self._try_delete_resource(self.delete_floatingip, fips[0])
+
+    @decorators.idempotent_id('62e32802-1d21-11eb-b322-74e5f9e2a801')
+    def test_port_with_fixed_ip(self):
+        """Test scenario:
+
+        1) Get the last IP from the range of Subnet "Allocation pool"
+        2) Create Port with fixed_ip resolved in #1
+        3) Create a VM using updated Port in #2 and add Floating IP
+        4) Check SSH access to VM
+        """
+        ip_range = [str(ip) for ip in ipaddress.IPv4Network(
+            self.subnet['cidr'])]
+        # Because of the tests executed in Parallel the IP may already
+        # be in use, so we'll try using IPs from Allocation pool
+        # (in reverse order) up until Port is successfully created.
+        for ip in reversed(ip_range):
+            try:
+                port = self.create_port(
+                    self.network,
+                    name=data_utils.rand_name("fixed_ip_port"),
+                    security_groups=[self.secgroup['id']],
+                    fixed_ips=[{'ip_address': ip}])
+                if port is not None:
+                    break
+            except Exception as e:
+                LOG.warn('Failed to create Port, using Fixed_IP:{}, '
+                         'the Error was:{}'.format(ip, e))
+        fip, server = self._create_instance_with_port(port)
+        self.check_connectivity(fip[0]['floating_ip_address'],
+                                CONF.validation.image_ssh_user,
+                                self.keypair['private_key'])