diff --git a/tests/glibcLocales/devenv.nix b/tests/glibcLocales/devenv.nix
index 8e74deee9..397a275cd 100644
--- a/tests/glibcLocales/devenv.nix
+++ b/tests/glibcLocales/devenv.nix
@@ -1,5 +1,6 @@
 {
   enterTest = ''
+    set -xe
     locale | grep "LANG=en_US.UTF-8"
   '';
 }