diff --git a/packages/google-cloud-bigquery-datatransfer/samples/snippets/quickstart_test.py b/packages/google-cloud-bigquery-datatransfer/samples/snippets/quickstart_test.py
index 0bb5ddd68110..cd397b814871 100644
--- a/packages/google-cloud-bigquery-datatransfer/samples/snippets/quickstart_test.py
+++ b/packages/google-cloud-bigquery-datatransfer/samples/snippets/quickstart_test.py
@@ -20,7 +20,7 @@
 import quickstart
 
 
-PROJECT = os.environ['GCLOUD_PROJECT']
+PROJECT = os.environ['GOOGLE_CLOUD_PROJECT']
 
 
 @pytest.fixture