diff --git a/lib/tempest b/lib/tempest
index b3a4c7b6e3..3f33512cf6 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -331,6 +331,7 @@ function configure_tempest {
     iniset $TEMPEST_CONFIG compute flavor_ref $flavor_ref
     iniset $TEMPEST_CONFIG compute flavor_ref_alt $flavor_ref_alt
     iniset $TEMPEST_CONFIG compute ssh_connect_method $ssh_connect_method
+    iniset $TEMPEST_CONFIG compute fixed_network_name $PRIVATE_NETWORK_NAME
 
     # Compute Features
     # Run ``verify_tempest_config -ur`` to retrieve enabled extensions on API endpoints