Index: Lib/test/test_ntpath.py
===================================================================
--- Lib/test/test_ntpath.py	(revision 78596)
+++ Lib/test/test_ntpath.py	(working copy)
@@ -178,6 +178,16 @@
                     for upath in (u'', u'fuu', u'f\xf9\xf9', u'/fuu', u'U:\\'):
                         self.assertIsInstance(ntpath.abspath(upath), unicode)
 
+    def test_abspath_on_devnull(self):
+        r"""
+        abspath(devnull) incorrectly returns '\\\\nul'
+        See bugs.python.org/issue7909
+        """
+        absolute_devnull = ntpath.abspath(os.devnull)
+        try:
+            open(absolute_devnull)
+        except IOError:
+            self.fail("IOError occurred opening absolute reference to NUL, which was %s" % absolute_devnull)
 
     def test_relpath(self):
         currentdir = os.path.split(os.getcwd())[-1]