diff --git a/lib/tempest b/lib/tempest
index 64b5453e35..5e522e1ec3 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -64,6 +64,7 @@ TEMPEST_STORAGE_PROTOCOL=${TEMPEST_STORAGE_PROTOCOL:-iSCSI}
 
 # Neutron/Network variables
 IPV6_ENABLED=$(trueorfalse True $IPV6_ENABLED)
+IPV6_SUBNET_ATTRIBUTES_ENABLED=$(trueorfalse True $IPV6_SUBNET_ATTRIBUTES_ENABLED)
 
 # Functions
 # ---------