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)
diff --git a/Lib/test/test_httplib.py b/Lib/test/test_httplib.py
index fb80e7a..890b1b9 100644
--- a/Lib/test/test_httplib.py
+++ b/Lib/test/test_httplib.py
@@ -560,7 +560,7 @@
         self.conn.request("PUT", "/url", "body")
         message, f = self.get_headers_and_fp()
         self.assertEqual("text/plain", message.get_content_type())
-        self.assertEqual(None, message.get_charset())
+        self.assertIsNone(message.get_charset())
         self.assertEqual("4", message.get("content-length"))
         self.assertEqual(b'body', f.read())
 
@@ -568,7 +568,7 @@
         self.conn.request("PUT", "/url", "body\xc1")
         message, f = self.get_headers_and_fp()
         self.assertEqual("text/plain", message.get_content_type())
-        self.assertEqual(None, message.get_charset())
+        self.assertIsNone(message.get_charset())
         self.assertEqual("5", message.get("content-length"))
         self.assertEqual(b'body\xc1', f.read())
 
@@ -576,7 +576,7 @@
         self.conn.request("PUT", "/url", b"body\xc1")
         message, f = self.get_headers_and_fp()
         self.assertEqual("text/plain", message.get_content_type())
-        self.assertEqual(None, message.get_charset())
+        self.assertIsNone(message.get_charset())
         self.assertEqual("5", message.get("content-length"))
         self.assertEqual(b'body\xc1', f.read())
 
@@ -587,7 +587,7 @@
             self.conn.request("PUT", "/url", f)
             message, f = self.get_headers_and_fp()
             self.assertEqual("text/plain", message.get_content_type())
-            self.assertEqual(None, message.get_charset())
+            self.assertIsNone(message.get_charset())
             self.assertEqual("4", message.get("content-length"))
             self.assertEqual(b'body', f.read())
 
@@ -598,7 +598,7 @@
             self.conn.request("PUT", "/url", f)
             message, f = self.get_headers_and_fp()
             self.assertEqual("text/plain", message.get_content_type())
-            self.assertEqual(None, message.get_charset())
+            self.assertIsNone(message.get_charset())
             self.assertEqual("5", message.get("content-length"))
             self.assertEqual(b'body\xc1', f.read())
 
diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index 46d2f47..ecbbdbf 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -396,7 +396,7 @@
         weak_cyclic_object = weakref.ref(cyclic_object)
         cyclic_object.thread.join()
         del cyclic_object
-        self.assertEqual(None, weak_cyclic_object(),
+        self.assertIsNone(weak_cyclic_object(),
                          msg=('%d references still around' %
                               sys.getrefcount(weak_cyclic_object())))
 
@@ -404,7 +404,7 @@
         weak_raising_cyclic_object = weakref.ref(raising_cyclic_object)
         raising_cyclic_object.thread.join()
         del raising_cyclic_object
-        self.assertEqual(None, weak_raising_cyclic_object(),
+        self.assertIsNone(weak_raising_cyclic_object(),
                          msg=('%d references still around' %
                               sys.getrefcount(weak_raising_cyclic_object())))
 
diff --git a/Lib/test/test_winreg.py b/Lib/test/test_winreg.py
index b6b23c8..0c1bf29 100644
--- a/Lib/test/test_winreg.py
+++ b/Lib/test/test_winreg.py
@@ -341,8 +341,8 @@
         with OpenKey(HKEY_LOCAL_MACHINE, "Software") as key:
             # HKLM\Software is redirected but not reflected in all OSes
             self.assertTrue(QueryReflectionKey(key))
-            self.assertEqual(None, EnableReflectionKey(key))
-            self.assertEqual(None, DisableReflectionKey(key))
+            self.assertIsNone(EnableReflectionKey(key))
+            self.assertIsNone(DisableReflectionKey(key))
             self.assertTrue(QueryReflectionKey(key))
 
     @unittest.skipUnless(HAS_REFLECTION, "OS doesn't support reflection")