diff -r 160fd3a40072 Lib/test/test_tarfile.py
--- a/Lib/test/test_tarfile.py	Sat Apr 05 21:53:18 2014 +0200
+++ b/Lib/test/test_tarfile.py	Sat Apr 05 22:41:25 2014 +0200
@@ -2135,11 +2135,14 @@
 class OpenFileobjNameInteger(unittest.TestCase):
     # Issue 21044: tarfile.open() should handle fileobj with an integer 'name'
     # attribute.
+    filename = support.TESTFN
 
     def test_open_fobj_integer_name(self):
-        import tempfile
-        with tempfile.TemporaryFile() as fobj:
-            tarfile.open(fileobj=fobj, mode='w')
+        fd = os.open(self.filename, os.O_WRONLY | os.O_CREAT)
+        with os.fdopen(fd, 'wb') as fobj:
+            for mode in ['', 'gz', 'bz2', 'xz']:
+                for sep in ['|', ':']:
+                    tarfile.open(fileobj=fobj, mode=('w' + sep + mode))
 
 
 def setUpModule():