@@ -241,7 +241,9 @@ function configure_tempest {

     # the public network (for floating ip access) is only available

     # if the extension is enabled.

-    if is_networking_extension_supported 'external-net'; then

+    # If NEUTRON_CREATE_INITIAL_NETWORKS is not true, there is no network created

+    # and the public_network_id should not be set.

+    if [[ "$NEUTRON_CREATE_INITIAL_NETWORKS" == "True" ]] && is_networking_extension_supported 'external-net'; then

         public_network_id=$(openstack network show -f value -c id $PUBLIC_NETWORK_NAME)

     fi