compression-webpack-plugin not compressing any files

I'm trying to compress my files to speed up access to my website. To do so I want to use compression-webpack-plugin. I've formatted it like this:

    new CompressionPlugin({
      filename: 'C:/test/[name].gz[query]',
      algorithm: 'gzip',
      test: /\.js$|\.css$|\.html$/,
      threshold: 0,
      minRatio: 0
    }),
    new CompressionPlugin({
      filename: 'C:\\test\\[name].br[query]',
      algorithm: 'brotliCompress',
      test: /\.(js|css|html|svg)$/,
      compressionOptions: {
        params: {
          [zlib.constants.BROTLI_PARAM_QUALITY]: 11
        }
      },
      threshold: 0,
      minRatio: 0
    })

I set the path on purpose to C:/test to see if the compression step was actually doing anything at all.

If I run my server build/host command I see it being executed in the steps. Command:

npx webpack server --progress --stats-error-details --config build/webpack.prod.conf.js

https://i.snipboard.io/41hTS3.jpg

Yet somehow no files are (ever) created.

https://i.snipboard.io/SLg1Ft.jpg

I must be missing something very straightforward, can anyone give me some pointers?