use assert[Not]In where appropriate
diff --git a/Lib/test/test_dictviews.py b/Lib/test/test_dictviews.py
index 78561b7..a5e2c85 100644
--- a/Lib/test/test_dictviews.py
+++ b/Lib/test/test_dictviews.py
@@ -24,10 +24,10 @@
         self.assertNotEqual(keys, set([1, "b"]))
         self.assertNotEqual(keys, set([1]))
         self.assertNotEqual(keys, 42)
-        self.assert_(1 in keys)
-        self.assert_("a" in keys)
-        self.assert_(10 not in keys)
-        self.assert_("Z" not in keys)
+        self.assertIn(1, keys)
+        self.assertIn("a", keys)
+        self.assertNotIn(10, keys)
+        self.assertNotIn("Z", keys)
         self.assertEqual(d.viewkeys(), d.viewkeys())
         e = {1: 11, "a": "def"}
         self.assertEqual(d.viewkeys(), e.viewkeys())
@@ -44,13 +44,13 @@
         self.assertNotEqual(items, set([(1, 10), ("a", "def")]))
         self.assertNotEqual(items, set([(1, 10)]))
         self.assertNotEqual(items, 42)
-        self.assert_((1, 10) in items)
-        self.assert_(("a", "ABC") in items)
-        self.assert_((1, 11) not in items)
-        self.assert_(1 not in items)
-        self.assert_(() not in items)
-        self.assert_((1,) not in items)
-        self.assert_((1, 2, 3) not in items)
+        self.assertIn((1, 10), items)
+        self.assertIn(("a", "ABC"), items)
+        self.assertNotIn((1, 11), items)
+        self.assertNotIn(1, items)
+        self.assertNotIn((), items)
+        self.assertNotIn((1,), items)
+        self.assertNotIn((1, 2, 3), items)
         self.assertEqual(d.viewitems(), d.viewitems())
         e = d.copy()
         self.assertEqual(d.viewitems(), e.viewitems())