diff --git a/Lib/test/test_time.py b/Lib/test/test_time.py
index d4f7d80..b68cd6a 100644
--- a/Lib/test/test_time.py
+++ b/Lib/test/test_time.py
@@ -240,7 +240,8 @@
                 tt = time.localtime(t)
             except (OverflowError, ValueError):
                 pass
-            self.assertEqual(time.mktime(tt), t)
+            else:
+                self.assertEqual(time.mktime(tt), t)
 
 class TestLocale(unittest.TestCase):
     def setUp(self):