diff --git a/Lib/test/test_doctest.py b/Lib/test/test_doctest.py
index f5a328e..89c878b 100644
--- a/Lib/test/test_doctest.py
+++ b/Lib/test/test_doctest.py
@@ -908,6 +908,35 @@
         ZeroDivisionError: integer division or modulo by zero
     TestResults(failed=1, attempted=1)
 """
+    def displayhook(): r"""
+Test that changing sys.displayhook doesn't matter for doctest.
+
+    >>> import sys
+    >>> orig_displayhook = sys.displayhook
+    >>> def my_displayhook(x):
+    ...     print('hi!')
+    >>> sys.displayhook = my_displayhook
+    >>> def f():
+    ...     '''
+    ...     >>> 3
+    ...     3
+    ...     '''
+    >>> test = doctest.DocTestFinder().find(f)[0]
+    >>> r = doctest.DocTestRunner(verbose=False).run(test)
+    >>> post_displayhook = sys.displayhook
+
+    We need to restore sys.displayhook now, so that we'll be able to test
+    results.
+
+    >>> sys.displayhook = orig_displayhook
+
+    Ok, now we can check that everything is ok.
+
+    >>> r
+    TestResults(failed=0, attempted=1)
+    >>> post_displayhook is my_displayhook
+    True
+"""
     def optionflags(): r"""
 Tests of `DocTestRunner`'s option flag handling.
 
diff --git a/Lib/test/test_ntpath.py b/Lib/test/test_ntpath.py
index 89b3f61..a421907 100644
--- a/Lib/test/test_ntpath.py
+++ b/Lib/test/test_ntpath.py
@@ -128,6 +128,9 @@
             self.assertTrue(isinstance(ntpath.normpath(path), unicode),
                             'normpath() returned str instead of unicode')
 
+        tester("ntpath.normpath('\\\\.\\NUL')", r'\\.\NUL')
+        tester("ntpath.normpath('\\\\?\\D:/XY\\Z')", r'\\?\D:/XY\Z')
+
     def test_expandvars(self):
         oldenv = os.environ.copy()
         try:
diff --git a/Lib/test/test_optparse.py b/Lib/test/test_optparse.py
index 641f37d..2fad442 100644
--- a/Lib/test/test_optparse.py
+++ b/Lib/test/test_optparse.py
@@ -799,15 +799,13 @@
         (options, args) = self.assertParseOK(["-q"],
                                              {'verbose': 0},
                                              [])
-        if hasattr(__builtins__, 'False'):
-            self.failUnless(options.verbose is False)
+        self.assertTrue(options.verbose is False)
 
     def test_bool_true(self):
         (options, args) = self.assertParseOK(["-v"],
                                              {'verbose': 1},
                                              [])
-        if hasattr(__builtins__, 'True'):
-            self.failUnless(options.verbose is True)
+        self.assertTrue(options.verbose is True)
 
     def test_bool_flicker_on_and_off(self):
         self.assertParseOK(["-qvq", "-q", "-v"],