diff --git a/src/allmydata/test/common_util.py b/src/allmydata/test/common_util.py
index 70713a995..d52cb8afa 100644
--- a/src/allmydata/test/common_util.py
+++ b/src/allmydata/test/common_util.py
@@ -2,8 +2,6 @@
 Ported to Python 3.
 """
 
-from future.utils import bchr
-
 import os
 import sys
 import time
@@ -25,6 +23,9 @@ from ..util.assertutil import precondition
 from ..scripts import runner
 from allmydata.util.encodingutil import unicode_platform, get_filesystem_encoding, argv_type, unicode_to_argv
 
+def bchr(s):
+    return bytes([s])
+
 
 def skip_if_cannot_represent_filename(u):
     precondition(isinstance(u, str))