diff --git a/iam/api-client/noxfile_config.py b/iam/api-client/noxfile_config.py
index c2be88b0e8a..155d8ba0ee7 100644
--- a/iam/api-client/noxfile_config.py
+++ b/iam/api-client/noxfile_config.py
@@ -33,8 +33,8 @@
     # to 'BUILD_SPECIFIC_GCLOUD_PROJECT' if you want to opt in using a
     # build specific Cloud project. You can also use your own string
     # to use your own Cloud project.
-    'gcloud_project_env': 'GOOGLE_CLOUD_PROJECT',
-    # 'gcloud_project_env': 'BUILD_SPECIFIC_GCLOUD_PROJECT',
+    # 'gcloud_project_env': 'GOOGLE_CLOUD_PROJECT',
+    'gcloud_project_env': 'BUILD_SPECIFIC_GCLOUD_PROJECT',
 
     # A dictionary you want to inject into your test. Don't put any
     # secrets here. These values will override predefined values.