diff --git a/etc/tempest.conf.sample b/etc/tempest.conf.sample
index 08f3fd4..96ef11a 100644
--- a/etc/tempest.conf.sample
+++ b/etc/tempest.conf.sample
@@ -452,6 +452,10 @@
 # value)
 #enable_instance_password=true
 
+# Does the test environment support dynamic network interface
+# attachment? (boolean value)
+#interface_attach=true
+
 
 [dashboard]