Issue 10825: Minor updates to the test suite.
diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py
index dddf0f8..b5822cc 100644
--- a/Lib/test/datetimetester.py
+++ b/Lib/test/datetimetester.py
@@ -202,7 +202,7 @@
 
 
     def test_dst(self):
-        self.assertEqual(None, timezone.utc.dst(self.DT))
+        self.assertIsNone(timezone.utc.dst(self.DT))
 
         with self.assertRaises(TypeError): self.EST.dst('')
         with self.assertRaises(TypeError): self.EST.dst(5)