diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 2bc5fc0..5bb45f5 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -5,6 +5,7 @@
 import os
 import unittest
 import warnings
+import sys
 from test import test_support
 
 warnings.filterwarnings("ignore", "tempnam", RuntimeWarning, __name__)
@@ -364,6 +365,20 @@
         except NotImplementedError:
             pass
 
+class Win32ErrorTests(unittest.TestCase):
+    def test_rename(self):
+        self.assertRaises(WindowsError, os.rename, test_support.TESTFN, test_support.TESTFN+".bak")
+
+    def test_remove(self):
+        self.assertRaises(WindowsError, os.remove, test_support.TESTFN)
+
+    def test_chdir(self):
+        self.assertRaises(WindowsError, os.chdir, test_support.TESTFN)
+
+if sys.platform != 'win32':
+    class Win32ErrorTests(unittest.TestCase):
+        pass
+
 def test_main():
     test_support.run_unittest(
         TemporaryFileTests,
@@ -372,7 +387,8 @@
         WalkTests,
         MakedirTests,
         DevNullTests,
-        URandomTests
+        URandomTests,
+        Win32ErrorTests
     )
 
 if __name__ == "__main__":
diff --git a/Lib/test/test_shutil.py b/Lib/test/test_shutil.py
index 7c28602..6ab5a35 100644
--- a/Lib/test/test_shutil.py
+++ b/Lib/test/test_shutil.py
@@ -48,12 +48,12 @@
         if self.errorState == 0:
             self.assertEqual(func, os.remove)
             self.assertEqual(arg, self.childpath)
-            self.assertEqual(exc[0], OSError)
+            self.failUnless(issubclass(exc[0], OSError))
             self.errorState = 1
         else:
             self.assertEqual(func, os.rmdir)
             self.assertEqual(arg, TESTFN)
-            self.assertEqual(exc[0], OSError)
+            self.failUnless(issubclass(exc[0], OSError))
             self.errorState = 2
 
     def test_rmtree_dont_delete_file(self):