diff --git a/tox.ini b/tox.ini
index be96a7984..b7d694945 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,6 @@ 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