Rename buffer -> bytearray.
diff --git a/Lib/test/test_marshal.py b/Lib/test/test_marshal.py
index fb70ced..d14d50d 100644
--- a/Lib/test/test_marshal.py
+++ b/Lib/test/test_marshal.py
@@ -39,7 +39,7 @@
         # we're running the test on a 32-bit box, of course.
 
         def to_little_endian_string(value, nbytes):
-            b = buffer()
+            b = bytearray()
             for i in range(nbytes):
                 b.append(value & 0xff)
                 value >>= 8