diff --git a/Lib/test/test_time.py b/Lib/test/test_time.py
index d70b59f1d0e..b4d12b4aaf9 100644
--- a/Lib/test/test_time.py
+++ b/Lib/test/test_time.py
@@ -230,7 +230,8 @@ class TimeTestCase(unittest.TestCase):
                 tt = time.localtime(t)
             except (OverflowError, ValueError):
                 pass
-            self.assertEqual(time.mktime(tt), t)
+            else:
+                self.assertEqual(time.mktime(tt), t)
 
 
 def test_main():