Address review comments
diff --git a/build_files_updated_unittest.sh b/build_files_updated_unittest.sh
index 95de01f..9c1f77a 100755
--- a/build_files_updated_unittest.sh
+++ b/build_files_updated_unittest.sh
@@ -2,6 +2,8 @@
 
 # This script verifies that BUILD files and cmake files are in sync with src/Makefile.am
 
+set -euo pipefail
+
 cp "BUILD" "BUILD.orginal"
 cp "cmake/extract_includes.bat.in" "cmake/extract_includes.bat.in.orginal"
 cp "cmake/libprotobuf-lite.cmake" "cmake/libprotobuf-lite.cmake.orginal"