diff --git a/sample_files/compare_all.sh b/sample_files/compare_all.sh
index afa8d3a8b..1301ed313 100755
--- a/sample_files/compare_all.sh
+++ b/sample_files/compare_all.sh
@@ -20,6 +20,7 @@ cargo build --release
 # Set language so we expand globs in a consistent order regardless of
 # locale (e.g. on GitHub actions).
 LANG=en_US.UTF-8
+unset LC_ALL LC_COLLATE
 
 echo "==> Check outputs"
 for before_f in sample_files/*before.*; do