diff --git a/Lib/test/test_hexoct.py b/Lib/test/test_hexoct.py
new file mode 100644
index 0000000..266d62f
--- /dev/null
+++ b/Lib/test/test_hexoct.py
@@ -0,0 +1,81 @@
+"""Test correct treatment of hex/oct constants.
+
+This is complex because of changes due to PEP 237.
+
+Some of these tests will hvae to change in Python 2.4!
+"""
+
+import unittest
+from test import test_support
+
+import warnings
+warnings.filterwarnings("ignore", "hex/oct constants", FutureWarning,
+                        "<string>")
+
+class TextHexOct(unittest.TestCase):
+
+    def test_hex_baseline(self):
+        # Baseline tests
+        self.assertEqual(0x0, 0)
+        self.assertEqual(0x10, 16)
+        self.assertEqual(0x7fffffff, 2147483647)
+        # Ditto with a minus sign and parentheses
+        self.assertEqual(-(0x0), 0)
+        self.assertEqual(-(0x10), -16)
+        self.assertEqual(-(0x7fffffff), -2147483647)
+        # Ditto with a minus sign and NO parentheses
+        self.assertEqual(-0x0, 0)
+        self.assertEqual(-0x10, -16)
+        self.assertEqual(-0x7fffffff, -2147483647)
+
+    def test_hex_unsigned(self):
+        # This test is in a <string> so we can ignore the warnings
+        exec """if 1:
+        # Positive-looking constants with negavive values
+        self.assertEqual(0x80000000, -2147483648L)
+        self.assertEqual(0xffffffff, -1)
+        # Ditto with a minus sign and parentheses
+        self.assertEqual(-(0x80000000), 2147483648L)
+        self.assertEqual(-(0xffffffff), 1)
+        # Ditto with a minus sign and NO parentheses
+        # This failed in Python 2.2 through 2.2.2 and in 2.3a1
+        self.assertEqual(-0x80000000, 2147483648L)
+        self.assertEqual(-0xffffffff, 1)
+        \n"""
+
+    def test_oct_baseline(self):
+        # Baseline tests
+        self.assertEqual(00, 0)
+        self.assertEqual(020, 16)
+        self.assertEqual(017777777777, 2147483647)
+        # Ditto with a minus sign and parentheses
+        self.assertEqual(-(00), 0)
+        self.assertEqual(-(020), -16)
+        self.assertEqual(-(017777777777), -2147483647)
+        # Ditto with a minus sign and NO parentheses
+        self.assertEqual(-00, 0)
+        self.assertEqual(-020, -16)
+        self.assertEqual(-017777777777, -2147483647)
+
+    def test_oct_unsigned(self):
+        # This test is in a <string> so we can ignore the warnings
+        exec """if 1:
+        # Positive-looking constants with negavive values
+        self.assertEqual(020000000000, -2147483648L)
+        self.assertEqual(037777777777, -1)
+        # Ditto with a minus sign and parentheses
+        self.assertEqual(-(020000000000), 2147483648L)
+        self.assertEqual(-(037777777777), 1)
+        # Ditto with a minus sign and NO parentheses
+        # This failed in Python 2.2 through 2.2.2 and in 2.3a1
+        self.assertEqual(-020000000000, 2147483648L)
+        self.assertEqual(-037777777777, 1)
+        \n"""
+
+def test_main():
+    suite = unittest.TestSuite()
+    suite.addTest(unittest.makeSuite(TextHexOct))
+    test_support.run_suite(suite)
+
+if __name__ == "__main__":
+    test_main()