Backport 69934:  Register xrange() as a Sequence.
diff --git a/Lib/test/test_collections.py b/Lib/test/test_collections.py
index 4901eae..9767aff 100644
--- a/Lib/test/test_collections.py
+++ b/Lib/test/test_collections.py
@@ -406,6 +406,9 @@
             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__')