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-rw-r--r--Lib/test/test_sys.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index e6d8e5082f..9aeb28a898 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -393,6 +393,9 @@ class SysModuleTest(unittest.TestCase):
thread_id = thread_info[0]
d = sys._current_frames()
+ for tid in d:
+ self.assertIsInstance(tid, int)
+ self.assertGreater(tid, 0)
main_id = threading.get_ident()
self.assertIn(main_id, d)