diff --git a/test/unit/test_tutorials/test_rec_system.py b/test/unit/test_tutorials/test_rec_system.py
index f8d7b247..c62f2b52 100644
--- a/test/unit/test_tutorials/test_rec_system.py
+++ b/test/unit/test_tutorials/test_rec_system.py
@@ -1,5 +1,7 @@
 # (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
 
+# pyre-strict
+
 
 import random
 import unittest