use assert[Not]IsInstance where appropriate
diff --git a/Lib/test/test_userdict.py b/Lib/test/test_userdict.py
index 3491f29..4821498 100644
--- a/Lib/test/test_userdict.py
+++ b/Lib/test/test_userdict.py
@@ -39,8 +39,8 @@
self.assertEqual(UserDict.UserDict.fromkeys('one two'.split(), 1), d5)
self.assertEqual(UserDict.UserDict().fromkeys('one two'.split(), 1), d5)
self.assertTrue(u1.fromkeys('one two'.split()) is not u1)
- self.assertTrue(isinstance(u1.fromkeys('one two'.split()), UserDict.UserDict))
- self.assertTrue(isinstance(u2.fromkeys('one two'.split()), UserDict.IterableUserDict))
+ self.assertIsInstance(u1.fromkeys('one two'.split()), UserDict.UserDict)
+ self.assertIsInstance(u2.fromkeys('one two'.split()), UserDict.IterableUserDict)
# Test __repr__
self.assertEqual(str(u0), str(d0))