diff --git a/src/allmydata/test/common_util.py b/src/allmydata/test/common_util.py
index 6b4e8513f..1ad0f8242 100644
--- a/src/allmydata/test/common_util.py
+++ b/src/allmydata/test/common_util.py
@@ -24,8 +24,6 @@ from allmydata.util.encodingutil import unicode_platform, get_filesystem_encodin
 from future.utils import bord, bchr, binary_type
 from past.builtins import unicode
 
-from ..util.encodingutil import unicode_to_argv
-
 
 def skip_if_cannot_represent_filename(u):
     precondition(isinstance(u, unicode))
diff --git a/src/allmydata/test/test_system.py b/src/allmydata/test/test_system.py
index 2a0a6eb00..192b82e78 100644
--- a/src/allmydata/test/test_system.py
+++ b/src/allmydata/test/test_system.py
@@ -12,7 +12,7 @@ if PY2:
     from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, dict, list, object, range, max, min, str  # noqa: F401
 
 from past.builtins import chr as byteschr, long
-from six import ensure_text, ensure_str, ensure_binary
+from six import ensure_text, ensure_str
 
 import os, re, sys, time, json
 from functools import partial