diff --git a/tempest/api/compute/admin/test_auto_allocate_network.py b/tempest/api/compute/admin/test_auto_allocate_network.py
index 0c80252..6f23866 100644
--- a/tempest/api/compute/admin/test_auto_allocate_network.py
+++ b/tempest/api/compute/admin/test_auto_allocate_network.py
@@ -175,9 +175,11 @@
         _, servers = compute.create_test_server(
             self.os_primary, networks='auto', wait_until='ACTIVE',
             min_count=3)
-        server_nets = set()
         for server in servers:
             self.addCleanup(self.delete_server, server['id'])
+
+        server_nets = set()
+        for server in servers:
             # get the server ips
             addresses = self.servers_client.list_addresses(
                 server['id'])['addresses']