diff --git a/Lib/test/test_time.py b/Lib/test/test_time.py
index 003856a..0e89904 100644
--- a/Lib/test/test_time.py
+++ b/Lib/test/test_time.py
@@ -423,6 +423,8 @@
         self.assertEqual(self.yearstr(-1), self._format % -1)
         self.assertEqual(self.yearstr(-1234), '-1234')
         self.assertEqual(self.yearstr(-123456), '-123456')
+        self.assertEqual(self.yearstr(-123456789), str(-123456789))
+        self.assertEqual(self.yearstr(-1234567890), str(-1234567890))
         self.assertEqual(self.yearstr(TIME_MINYEAR), str(TIME_MINYEAR))
         self.assertRaises(OverflowError, self.yearstr, TIME_MINYEAR - 1)