diff --git a/stacklight_tests/toolchain/test_system.py b/stacklight_tests/toolchain/test_system.py
index 7fc37ce..9c335d0 100644
--- a/stacklight_tests/toolchain/test_system.py
+++ b/stacklight_tests/toolchain/test_system.py
@@ -174,7 +174,7 @@ class TestNodesToolchain(api.ToolchainApi):
 
         self.activate_plugins()
 
-        self.helpers.deploy_cluster(self.base_nodes)
+        self.helpers.deploy_cluster(self.settings.base_nodes)
 
         self.check_plugins_online()