diff --git a/tempest/tests/compute/servers/test_multiple_create.py b/tempest/tests/compute/servers/test_multiple_create.py
index ad5d604..47a38b1 100644
--- a/tempest/tests/compute/servers/test_multiple_create.py
+++ b/tempest/tests/compute/servers/test_multiple_create.py
@@ -48,7 +48,7 @@
         created_servers = self._get_created_servers(kwargs['name'])
         # NOTE(maurosr): append it to cls.servers list from base.BaseCompute
         # class.
-        self.servers.append(created_servers)
+        self.servers.extend(created_servers)
         # NOTE(maurosr): get a server list, check status of the ones with names
         # that match and wait for them become active. At a first look, since
         # they are building in parallel, wait inside the for doesn't seem be