The problem is sys.maxint on 32bit and 64bit python on windows are same.

CHANGES.txt

@@ -4,6 +4,8 @@ Changelog
 2.13.5 (unreleased)
 -------------------
 
+- Fixed unit tests that failed on 64bit python on Windows machines
+
 
 2.13.4 (2010-08-31)
 -------------------

src/Acquisition/tests.py

@@ -1840,7 +1840,7 @@ def test_proxying():
     >>> c[5:10]
     slicing...
     (5, 10)
-    >>> c[5:] == (5, sys.maxint)
+    >>> c[5:] == (5, sys.maxsize)
     slicing...
     True
 
@@ -1863,7 +1863,7 @@ def test_proxying():
     >>> i.c[5:10]
     slicing...
     (5, 10)
-    >>> i.c[5:] == (5, sys.maxint)
+    >>> i.c[5:] == (5, sys.maxsize)
     slicing...
     True
 
@@ -1904,7 +1904,7 @@ def test_proxying():
     >>> c[5:10]
     slicing...
     (5, 10)
-    >>> c[5:] == (5, sys.maxint)
+    >>> c[5:] == (5, sys.maxsize)
     slicing...
     True
 
@@ -1927,7 +1927,7 @@ def test_proxying():
     >>> i.c[5:10]
     slicing...
     (5, 10)
-    >>> i.c[5:] == (5, sys.maxint)
+    >>> i.c[5:] == (5, sys.maxsize)
     slicing...
     True