diff --git a/etc/tempest.conf.sample b/etc/tempest.conf.sample
index 168560a..b3aca42 100644
--- a/etc/tempest.conf.sample
+++ b/etc/tempest.conf.sample
@@ -122,6 +122,14 @@
 # the domain from theadmin user is used instead. (string value)
 #tenant_isolation_domain_name = <None>
 
+# If allow_tenant_isolation is set to True and Neutron is enabled
+# Tempest will try to create a useable network, subnet, and router
+# when needed for each tenant it  creates. However in some neutron
+# configurations, like with VLAN provider networks, this doesn't work.
+# So if set to False the isolated networks will not be created
+# (boolean value)
+#create_isolated_networks = true
+
 
 [baremetal]