diff --git a/tox.ini b/tox.ini
index 9910d84..8a3a153 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,7 +14,7 @@ changedir = {toxinidir}/tests
 # List common dependencies for Python interpreters here:
 setenv =
     PYTHONPATH = {toxinidir}/library:{toxinidir}/module_utils
-    LC_ALL = C
+    LC_ALL = C.UTF-8
     SRC_MODULE_UTILS_DIR = {envsitepackagesdir}/ansible/module_utils
     DEST_MODULE_UTILS_DIR = {toxinidir}/module_utils
 deps =