diff --git a/tox.ini b/tox.ini
index a6c7fd4..d84b865 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,13 +7,11 @@ skipsdist = True
 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
+         OS_TEST_PATH=./refstack_client/tests/unit
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands =
-  stestr --test-path ./refstack_client/tests/unit run {posargs}
+  stestr run {posargs}
 distribute = false
 
 [testenv:pep8]