diff --git a/tools/python/xen/xend/tests/test_uuid.py b/tools/python/xen/xend/tests/test_uuid.py
index d79ab53e4a..d96c9043e1 100644
--- a/tools/python/xen/xend/tests/test_uuid.py
+++ b/tools/python/xen/xend/tests/test_uuid.py
@@ -21,9 +21,9 @@ class test_uuid(unittest.TestCase):
             self.assertEqual(uuid.toString(inp), expected)
             self.assertEqual(uuid.fromString(expected), inp)
 
-        t([0 for _ in range(0, 16)], "00000000-00000000-00000000-00000000")
+        t([0 for _ in range(0, 16)], "00000000-0000-0000-0000-000000000000")
         t([185, 158, 125, 206, 250, 178, 125, 57, 2, 6, 162, 74, 178, 236,
-           196, 5], "b99e7dce-fab27d39-0206a24a-b2ecc405")
+           196, 5], "b99e7dce-fab2-7d39-0206-a24ab2ecc405")
 
 
 def test_suite():