Index: Lib/test/test_subprocess.py
===================================================================
--- Lib/test/test_subprocess.py	(Revision 43076)
+++ Lib/test/test_subprocess.py	(Arbeitskopie)
@@ -29,10 +29,16 @@
 class ProcessTestCase(unittest.TestCase):
     def mkstemp(self):
         """wrapper for mkstemp, calling mktemp if mkstemp is not available"""
+        # The temporary file needs execution permission which might
+        # not be available on the canonical tempdir. Thus use the
+        # parent directory of sys.executable which should also be
+        # writable since it was used to build the executable in the
+        # first place.
+        tdir = os.path.dirname(sys.executable)
         if hasattr(tempfile, "mkstemp"):
-            return tempfile.mkstemp()
+            return tempfile.mkstemp(dir=tdir)
         else:
-            fname = tempfile.mktemp()
+            fname = tempfile.mktemp(dir=tdir)
             return os.open(fname, os.O_RDWR|os.O_CREAT), fname
 
     #