To update these tests, first update the .js file that you want to update. Then, run uglify (can be installed via npm install -g uglify-js) For example:

uglifyjs cjs-subdir-main.js --source-map -o cjs-subdir-main.min.js

This will minify the files and place a source map which can be used for testing in the directory.

Note that some files have manually crafted source maps, e.g. cjs-subdir-partially-mapped.js.