diff -r 13b72f6365fe Lib/test/test_ntpath.py
--- a/Lib/test/test_ntpath.py	Mon May 26 01:00:34 2014 +1000
+++ b/Lib/test/test_ntpath.py	Sun May 25 22:56:12 2014 +0300
@@ -341,6 +341,41 @@
             self.assertTrue(ntpath.ismount(b"\\\\localhost\\c$"))
             self.assertTrue(ntpath.ismount(b"\\\\localhost\\c$\\"))
 
+    def test_expanduser(self):
+        tester("ntpath.expanduser('test')", 'test')
+
+        with support.EnvironmentVarGuard() as env:
+            env.clear()
+            tester("ntpath.expanduser('~test')", '~test')
+
+            env['HOMEPATH'] = 'eric\\idle'
+            env['HOMEDRIVE'] = 'C:\\'
+            tester("ntpath.expanduser('~test')", 'C:\\eric\\test')
+            tester("ntpath.expanduser('~test\\foo\\bar')",
+                   "C:\\eric\\test\\foo\\bar")
+            tester("ntpath.expanduser('~')", 'C:\\eric\\idle')
+
+            del env['HOMEDRIVE']
+            tester("ntpath.expanduser('~test')", 'eric\\test')
+            tester("ntpath.expanduser('~test\\foo\\bar')",
+                   "eric\\test\\foo\\bar")
+            tester("ntpath.expanduser('~')", 'eric\\idle')
+
+            env.clear()
+            env['USERPROFILE'] = 'C:\\eric\\idle'
+            tester("ntpath.expanduser('~test')", 'C:\\eric\\test')
+            tester("ntpath.expanduser('~test\\foo\\bar')",
+                   "C:\\eric\\test\\foo\\bar")
+            tester("ntpath.expanduser('~')", 'C:\\eric\\idle')
+
+            env.clear()
+            env['HOME'] = 'C:\\idle\\eric'
+            tester("ntpath.expanduser('~test')", 'C:\\idle\\test')
+            tester("ntpath.expanduser('~test\\foo\\bar')",
+                   "C:\\idle\\test\\foo\\bar")
+            tester("ntpath.expanduser('~')", 'C:\\idle\\eric')
+
+
 class NtCommonTest(test_genericpath.CommonTest, unittest.TestCase):
     pathmodule = ntpath
     attributes = ['relpath', 'splitunc']