diff -up ./test_import.py.11956 ./test_import.py
--- ./test_import.py.11956	2011-04-29 11:38:43.000000000 +0100
+++ ./test_import.py	2011-04-29 18:02:42.000000000 +0100
@@ -533,8 +533,8 @@ class PycacheTests(unittest.TestCase):
             '__pycache__', '{}.{}.py{}'.format(
             TESTFN, self.tag, __debug__ and 'c' or 'o'))))
 
-    @unittest.skipUnless(os.name == 'posix',
-                         "test meaningful only on posix systems")
+    @unittest.skipUnless( (os.name == 'posix') and not ( os.getuid() == 0 ),
+                         "test meaningful only on posix systems as non-root user")
     def test_unwritable_directory(self):
         # When the umask causes the new __pycache__ directory to be
         # unwritable, the import still succeeds but no .pyc file is written.