diff --git a/public/config_test.py b/public/config_test.py
index 15e612f..8073c5e 100644
--- a/public/config_test.py
+++ b/public/config_test.py
@@ -70,6 +70,7 @@
     stable_host_image_project: "fake_stable_host_image_project"
     stable_goldfish_host_image_name: "fake_stable_goldfish_host_image_name"
     stable_goldfish_host_image_project: "fake_stable_goldfish_host_image_project"
+    instance_name_pattern: "fake_instance_name_pattern"
     stable_cheeps_host_image_name: "fake_stable_cheeps_host_image_name"
     stable_cheeps_host_image_project: "fake_stable_cheeps_host_image_project"
     metadata_variable {
@@ -231,6 +232,8 @@
         self.assertEqual(cfg.default_usr_cfg.stable_goldfish_host_image_project,
                          "fake_stable_goldfish_host_image_project")
         self.assertEqual(cfg.emulator_build_target, "sdk_tools_linux")
+        self.assertEqual(cfg.default_usr_cfg.instance_name_pattern,
+                         "fake_instance_name_pattern")
 
         # Cheeps related
         self.assertEqual(cfg.default_usr_cfg.stable_cheeps_host_image_name,