diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 3dc96a3..31f2cc3 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -2567,6 +2567,7 @@
         MakedirTests,
         DevNullTests,
         URandomTests,
+        URandomFDTests,
         ExecTests,
         Win32ErrorTests,
         TestInvalidFD,