diff --git a/Lib/test/test_datetime.py b/Lib/test/test_datetime.py
index 8bf8420..d85217d 100644
--- a/Lib/test/test_datetime.py
+++ b/Lib/test/test_datetime.py
@@ -261,6 +261,13 @@
         self.assertEqual(td.seconds, seconds)
         self.assertEqual(td.microseconds, us)
 
+    def test_total_seconds(self):
+        td = timedelta(days=365)
+        self.assertEqual(td.total_seconds(), 31536000.0)
+        for total_seconds in [123456.789012, -123456.789012, 0.123456, 0, 1e6]:
+            td = timedelta(seconds=total_seconds)
+            self.assertEqual(td.total_seconds(), total_seconds)
+
     def test_carries(self):
         t1 = timedelta(days=100,
                        weeks=-7,