diff --git a/scenario/test_neutron_autoscaling.py b/scenario/test_neutron_autoscaling.py
index 9a1e634..e7aae19 100644
--- a/scenario/test_neutron_autoscaling.py
+++ b/scenario/test_neutron_autoscaling.py
@@ -40,7 +40,7 @@
             "image_id": self.conf.minimal_image_ref,
             "capacity": "1",
             "instance_type": self.conf.minimal_instance_type,
-            "fixed_subnet_name": self.conf.fixed_subnet_name,
+            "fixed_subnet": self.net['subnets'][0],
         }
 
         # Launch stack