Index: Lib/test/test_fileio.py
===================================================================
--- Lib/test/test_fileio.py	(revision 68294)
+++ Lib/test/test_fileio.py	(working copy)
@@ -113,7 +113,16 @@
         else:
             self.fail("Should have raised IOError")
 
+    def testClose(self):
+        # Open a file via os.open and attach the received filedescriptor
+        # to a FileIO object. When we pull the file from under the stream's
+        # feet, any operation like e.g. closing must fail.
 
+        fd = os.open(TESTFN, os.O_RDONLY)
+        s = _fileio._FileIO(fd)
+        os.close(fd)
+        self.assertRaises(IOError, s.close)
+
 class OtherFileTests(unittest.TestCase):
 
     def testAbles(self):