diff --git a/tox.ini b/tox.ini
index f77b6da4d4..2bbd07e730 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,9 +7,6 @@ envlist = py26,py27,py33,pep8,docs
 usedevelop = True
 install_command = pip install -U {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
-         LANG=en_US.UTF-8
-         LANGUAGE=en_US:en
-         LC_ALL=C
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = python setup.py testr --testr-args='{posargs}'