diff --git a/api/controller/artifacts_unittest.py b/api/controller/artifacts_unittest.py
index a3b8f19..5f44e13 100644
--- a/api/controller/artifacts_unittest.py
+++ b/api/controller/artifacts_unittest.py
@@ -9,6 +9,7 @@
 
 import collections
 import os
+import sys
 
 import mock
 
@@ -26,6 +27,9 @@
 from chromite.service import artifacts as artifacts_svc
 
 
+assert sys.version_info >= (3, 6), 'This module requires Python 3.6+'
+
+
 PinnedGuestImage = collections.namedtuple('PinnedGuestImage',
                                           ['filename', 'uri'])