diff --git a/neutron_tempest_plugin/api/test_port_forwarding_negative.py b/neutron_tempest_plugin/api/test_port_forwarding_negative.py
new file mode 100644
index 0000000..76dd6ee
--- /dev/null
+++ b/neutron_tempest_plugin/api/test_port_forwarding_negative.py
@@ -0,0 +1,83 @@
+# Copyright 2020 OpenStack Foundation
+# 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 tempest.lib.common.utils import data_utils
+from tempest.lib import decorators
+from tempest.lib import exceptions
+
+from neutron_tempest_plugin.api import base
+from neutron_tempest_plugin import config
+
+CONF = config.CONF
+
+
+class PortForwardingNegativeTestJSON(base.BaseNetworkTest):
+    required_extensions = ['router', 'floating-ip-port-forwarding']
+
+    @classmethod
+    def resource_setup(cls):
+        super(PortForwardingNegativeTestJSON, cls).resource_setup()
+        cls.ext_net_id = CONF.network.public_network_id
+
+        # Create network, subnet, router and add interface
+        cls.network = cls.create_network()
+        cls.subnet = cls.create_subnet(cls.network)
+        cls.router = cls.create_router(data_utils.rand_name('router'),
+                                       external_network_id=cls.ext_net_id)
+        cls.create_router_interface(cls.router['id'], cls.subnet['id'])
+
+    @decorators.attr(type='negative')
+    @decorators.idempotent_id('63c0d406-99d5-11ea-bb37-0242ac130002')
+    def test_mapping_same_fip_and_external_port_to_different_dest(self):
+        port1 = self.create_port(self.network)
+        port2 = self.create_port(self.network)
+        fip_for_pf = self.create_floatingip()
+
+        self.create_port_forwarding(
+            fip_for_pf['id'],
+            internal_port_id=port1['id'],
+            internal_ip_address=port1['fixed_ips'][0]['ip_address'],
+            internal_port=1111, external_port=2222,
+            protocol="tcp")
+
+        self.assertRaises(
+            exceptions.BadRequest,
+            self.create_port_forwarding,
+            fip_for_pf['id'],
+            internal_port_id=port2['id'],
+            internal_ip_address=port2['fixed_ips'][0]['ip_address'],
+            internal_port=3333, external_port=2222,
+            protocol="tcp")
+
+    @decorators.attr(type='negative')
+    @decorators.idempotent_id('0c229a4c-9f28-11ea-bb37-0242ac130002')
+    def test_mapping_different_external_ports_to_the_same_destination(self):
+        port = self.create_port(self.network)
+        fip_for_pf = self.create_floatingip()
+
+        self.create_port_forwarding(
+            fip_for_pf['id'],
+            internal_port_id=port['id'],
+            internal_ip_address=port['fixed_ips'][0]['ip_address'],
+            internal_port=1111, external_port=3333,
+            protocol="tcp")
+
+        self.assertRaises(
+            exceptions.BadRequest,
+            self.create_port_forwarding,
+            fip_for_pf['id'],
+            internal_port_id=port['id'],
+            internal_ip_address=port['fixed_ips'][0]['ip_address'],
+            internal_port=1111, external_port=5555,
+            protocol="tcp")
diff --git a/zuul.d/base.yaml b/zuul.d/base.yaml
index b6d9f90..db59ac0 100644
--- a/zuul.d/base.yaml
+++ b/zuul.d/base.yaml
@@ -34,6 +34,8 @@
         neutron-port-forwarding: true
         neutron-conntrack-helper: true
         neutron-tag-ports-during-bulk-creation: true
+        br-ex-tcpdump: true
+        br-int-flows: true
       devstack_local_conf:
         post-config:
           $NEUTRON_CONF:
diff --git a/zuul.d/master_jobs.yaml b/zuul.d/master_jobs.yaml
index 7e93aaf..45862c8 100644
--- a/zuul.d/master_jobs.yaml
+++ b/zuul.d/master_jobs.yaml
@@ -183,6 +183,66 @@
               q_agent: linuxbridge
 
 - job:
+    name: neutron-tempest-plugin-scenario-ovn
+    parent: neutron-tempest-plugin-scenario
+    timeout: 10000
+    vars:
+      network_api_extensions: *api_extensions
+      # TODO(haleyb): Remove this blacklist when
+      # https://bugs.launchpad.net/neutron/+bug/1881558 is fixed.
+      tempest_black_regex: "(?:neutron_tempest_plugin.scenario.test_ipv6.IPv6Test)"
+      devstack_localrc:
+        Q_AGENT: ovn
+        NETWORK_API_EXTENSIONS: "{{ network_api_extensions | join(',') }}"
+        Q_ML2_PLUGIN_MECHANISM_DRIVERS: ovn,logger
+        Q_ML2_PLUGIN_TYPE_DRIVERS: local,flat,vlan,geneve
+        Q_ML2_TENANT_NETWORK_TYPE: geneve
+        Q_USE_PROVIDERNET_FOR_PUBLIC: true
+        PHYSICAL_NETWORK: public
+        ENABLE_CHASSIS_AS_GW: true
+        OVN_L3_CREATE_PUBLIC_NETWORK: true
+        OVN_DBS_LOG_LEVEL: dbg
+        # TODO(mjozefcz): Stop compiling OVS modules when meter action in kernel
+        # will be released in Ubuntu Bionic.
+        # More info: https://mail.openvswitch.org/pipermail/ovs-discuss/2018-December/048009.html
+        OVN_BUILD_MODULES: True
+        ENABLE_TLS: True
+        OVN_IGMP_SNOOPING_ENABLE: True
+      devstack_services:
+        br-ex-tcpdump: true
+        br-int-flows: true
+        q-ovn-metadata-agent: true
+        ovn-controller: true
+        ovn-northd: true
+        ovs-vswitchd: true
+        ovsdb-server: true
+        q-agt: false
+        q-dhcp: false
+        q-l3: false
+        q-meta: false
+        q-metering: 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:
+          $NEUTRON_CONF:
+            DEFAULT:
+              enable_dvr: false
+          /$NEUTRON_CORE_PLUGIN_CONF:
+            ml2:
+              type_drivers: local,flat,vlan,geneve
+        test-config:
+          $TEMPEST_CONFIG:
+            neutron_plugin_options:
+              available_type_drivers: local,flat,vlan,geneve
+              is_igmp_snooping_enabled: True
+
+- job:
     name: neutron-tempest-plugin-dvr-multinode-scenario
     parent: tempest-multinode-full
     description: |
diff --git a/zuul.d/project.yaml b/zuul.d/project.yaml
index 80c3a72..3086d6c 100644
--- a/zuul.d/project.yaml
+++ b/zuul.d/project.yaml
@@ -7,11 +7,13 @@
         - neutron-tempest-plugin-scenario-linuxbridge
         - neutron-tempest-plugin-scenario-openvswitch
         - neutron-tempest-plugin-scenario-openvswitch-iptables_hybrid
+        - neutron-tempest-plugin-scenario-ovn
     gate:
       jobs:
         - neutron-tempest-plugin-api
         - neutron-tempest-plugin-scenario-linuxbridge
         - neutron-tempest-plugin-scenario-openvswitch
+        - neutron-tempest-plugin-scenario-ovn
         - neutron-tempest-plugin-scenario-openvswitch-iptables_hybrid
     #TODO(slaweq): Move neutron-tempest-plugin-dvr-multinode-scenario out of
     #              the experimental queue when it will be more stable
@@ -104,6 +106,7 @@
         - neutron-tempest-plugin-scenario-linuxbridge-ussuri
         - neutron-tempest-plugin-scenario-openvswitch-ussuri
         - neutron-tempest-plugin-scenario-openvswitch-iptables_hybrid-ussuri
+        - neutron-tempest-plugin-scenario-ovn-ussuri
     gate:
       jobs:
         - neutron-tempest-plugin-api-ussuri
diff --git a/zuul.d/ussuri_jobs.yaml b/zuul.d/ussuri_jobs.yaml
index 4e7bd5d..a9e578e 100644
--- a/zuul.d/ussuri_jobs.yaml
+++ b/zuul.d/ussuri_jobs.yaml
@@ -97,9 +97,9 @@
 - job:
     name: neutron-tempest-plugin-scenario-openvswitch-iptables_hybrid-ussuri
     parent: neutron-tempest-plugin-scenario-openvswitch-iptables_hybrid
-    override-checkout: stable-ussuri
+    override-checkout: stable/ussuri
     vars:
-      branch_override: stable-ussuri
+      branch_override: stable/ussuri
       network_api_extensions: *api_extensions
       devstack_localrc:
         NETWORK_API_EXTENSIONS: "{{ network_api_extensions | join(',') }}"
@@ -115,6 +115,16 @@
         NETWORK_API_EXTENSIONS: "{{ network_api_extensions | join(',') }}"
 
 - job:
+    name: neutron-tempest-plugin-scenario-ovn-ussuri
+    parent: neutron-tempest-plugin-scenario-ovn
+    override-checkout: stable/ussuri
+    vars:
+      branch_override: stable/ussuri
+      network_api_extensions: *api_extensions
+      devstack_localrc:
+        NETWORK_API_EXTENSIONS: "{{ network_api_extensions | join(',') }}"
+
+- job:
     name: neutron-tempest-plugin-dvr-multinode-scenario-ussuri
     parent: neutron-tempest-plugin-dvr-multinode-scenario
     override-checkout: stable/ussuri