diff --git a/zaza/openstack/charm_tests/tempest/setup.py b/zaza/openstack/charm_tests/tempest/setup.py
index 5dd833e..7f97014 100644
--- a/zaza/openstack/charm_tests/tempest/setup.py
+++ b/zaza/openstack/charm_tests/tempest/setup.py
@@ -106,6 +106,8 @@ def add_neutron_config(ctxt, keystone_session):
     :returns: None
     :rtype: None
     """
+    current_release = openstack_utils.get_os_release()
+    focal_ussuri = openstack_utils.get_os_release('focal_ussuri')
     neutron_client = openstack_utils.get_neutron_session_client(
         keystone_session)
     for net in neutron_client.list_networks()['networks']:
@@ -116,6 +118,27 @@ def add_neutron_config(ctxt, keystone_session):
         if router['name'] == 'provider-router':
             ctxt['provider_router_id'] = router['id']
             break
+    # For focal+ with OVN, we use the same settings as upstream gate.
+    # This is because the l3_agent_scheduler extension is only
+    # applicable for OVN when conventional layer-3 agent enabled:
+    # https://docs.openstack.org/networking-ovn/2.0.1/features.html
+    # This enables test_list_show_extensions to run successfully.
+    if current_release >= focal_ussuri:
+        extensions = ('address-scope,agent,allowed-address-pairs,'
+                      'auto-allocated-topology,availability_zone,'
+                      'binding,default-subnetpools,external-net,'
+                      'extra_dhcp_opt,multi-provider,net-mtu,'
+                      'network_availability_zone,network-ip-availability,'
+                      'port-security,provider,quotas,rbac-address-scope,'
+                      'rbac-policies,standard-attr-revisions,security-group,'
+                      'standard-attr-description,subnet_allocation,'
+                      'standard-attr-tag,standard-attr-timestamp,trunk,'
+                      'quota_details,router,extraroute,ext-gw-mode,'
+                      'fip-port-details,pagination,sorting,project-id,'
+                      'dns-integration,qos')
+        ctxt['neutron_api_extensions'] = extensions
+    else:
+        ctxt['neutron_api_extensions'] = 'all'
 
 
 def add_glance_config(ctxt, keystone_session):
diff --git a/zaza/openstack/charm_tests/tempest/templates/tempest_v3.py b/zaza/openstack/charm_tests/tempest/templates/tempest_v3.py
index f189ad5..7c95e3e 100644
--- a/zaza/openstack/charm_tests/tempest/templates/tempest_v3.py
+++ b/zaza/openstack/charm_tests/tempest/templates/tempest_v3.py
@@ -52,9 +52,11 @@ project_network_cidr = {os_test_cidr_priv}
 public_network_id = {ext_net}
 dns_servers = {os_test_nameserver}
 project_networks_reachable = false
+floating_network_name = {ext_net}
 
 [network-feature-enabled]
 ipv6 = false
+api_extensions = {neutron_api_extensions}
 
 [orchestration]
 stack_owner_role = Admin