Fix those parts in the testsuite that assumed that sys.maxint would cause overflow on x64.  Now the testsuite is well behaved on that platform.
diff --git a/Lib/test/test_unittest.py b/Lib/test/test_unittest.py
index 7e60548..8d5bb63 100644
--- a/Lib/test/test_unittest.py
+++ b/Lib/test/test_unittest.py
@@ -540,7 +540,8 @@
             # audioop should now be loaded, thanks to loadTestsFromName()
             self.failUnless(module_name in sys.modules)
         finally:
-            del sys.modules[module_name]
+            if module_name in sys.modules:
+                del sys.modules[module_name]
 
     ################################################################
     ### Tests for TestLoader.loadTestsFromName()
@@ -936,7 +937,8 @@
             # audioop should now be loaded, thanks to loadTestsFromName()
             self.failUnless(module_name in sys.modules)
         finally:
-            del sys.modules[module_name]
+            if module_name in sys.modules:
+                del sys.modules[module_name]
 
     ################################################################
     ### /Tests for TestLoader.loadTestsFromNames()