diff --git a/Lib/test/test_collections.py b/Lib/test/test_collections.py
index e11d999..fe96117 100644
--- a/Lib/test/test_collections.py
+++ b/Lib/test/test_collections.py
@@ -393,6 +393,9 @@
             self.failUnless(isinstance(sample(), Sequence))
             self.failUnless(issubclass(sample, Sequence))
         self.failUnless(issubclass(basestring, Sequence))
+        self.failUnless(isinstance(range(10), Sequence))
+        self.failUnless(issubclass(xrange, Sequence))
+        self.failUnless(issubclass(str, Sequence))
         self.validate_abstract_methods(Sequence, '__contains__', '__iter__', '__len__',
             '__getitem__')