diff --git a/dev/reformat b/dev/reformat
index 4ff15837be..c6e3f99744 100755
--- a/dev/reformat
+++ b/dev/reformat
@@ -1,6 +1,7 @@
 #!/bin/bash
 
 set -x
+set -euo pipefail
 
 SCRIPT_DIR="$(dirname "$(realpath "$0")")"
 cd "$SCRIPT_DIR/.."