diff --git a/tox.ini b/tox.ini
index 88f2537..860c8ae 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,9 +6,6 @@
 [testenv]
 sitepackages = True
 setenv = VIRTUAL_ENV={envdir}
-         LANG=en_US.UTF-8
-         LANGUAGE=en_US:en
-         LC_ALL=C
          OS_TEST_PATH=./tempest/test_discover
 usedevelop = True
 install_command = pip install {opts} {packages}