diff --git a/Lib/test/test_base64.py b/Lib/test/test_base64.py
index 65977ca8c9..ac3f094054 100644
--- a/Lib/test/test_base64.py
+++ b/Lib/test/test_base64.py
@@ -394,10 +394,6 @@ class BaseXYTestCase(unittest.TestCase):
         self.assertRaises(binascii.Error, base64.b32decode, b'me======')
         self.assertRaises(binascii.Error, base64.b32decode, 'me======')
 
-        # Mapping zero and one
-        eq(base64.b32decode(b'MLO23456'), b'b\xdd\xad\xf3\xbe')
-        eq(base64.b32decode('MLO23456'), b'b\xdd\xad\xf3\xbe')
-
     def test_b32decode_map01(self):
         # Mapping zero and one
         eq = self.assertEqual