diff --git a/tests/functions/language_select_test.php b/tests/functions/language_select_test.php
index 3e7ed45bbf..3ec2bd4bc3 100644
--- a/tests/functions/language_select_test.php
+++ b/tests/functions/language_select_test.php
@@ -22,6 +22,7 @@ class phpbb_functions_language_select_test extends phpbb_database_test_case
array('', ''),
array('en', ''),
array('de', ''),
+ array('cs', ''),
);
}