diff --git a/iot/api-client/manager/manager_test.py b/iot/api-client/manager/manager_test.py
index 78067d3e0397..cdd8613943b9 100644
--- a/iot/api-client/manager/manager_test.py
+++ b/iot/api-client/manager/manager_test.py
@@ -32,7 +32,7 @@
 es_cert_path = 'resources/ec_public.pem'
 rsa_cert_path = 'resources/rsa_cert.pem'
 rsa_private_path = 'resources/rsa_private.pem'  # Must match rsa_cert
-topic_id = 'test-device-events-{}'.format(uuid.uuid1())
+topic_id = 'test-device-events-{}'.format(uuid.uuid4())
 
 project_id = os.environ['GCLOUD_PROJECT']
 service_account_json = os.environ['GOOGLE_APPLICATION_CREDENTIALS']