diff --git a/tempest/scenario/manager.py b/tempest/scenario/manager.py
index c01de83..c4b98d5 100644
--- a/tempest/scenario/manager.py
+++ b/tempest/scenario/manager.py
@@ -656,3 +656,10 @@
     @classmethod
     def _stack_rand_name(cls):
         return rand_name(cls.__name__ + '-')
+
+    @classmethod
+    def _get_default_network(cls):
+        networks = cls.network_client.list_networks()
+        for net in networks['networks']:
+            if net['name'] == cls.config.compute.fixed_network_name:
+                return net