old_contents: export default function factory () {
    return {
      require: ['esm'],
      files: [
        'test/*.js'
      ],
      sources: [
        'src/**/*.js'
      ],
      cache: true,
      concurrency: 5,
      failFast: true,
      timeout: '3s'
    }
  }
  
new_contents: export default function factory () {
    return {
      require: ['esm'],
      files: [
        'test/*.js'
      ],
      sources: [
        'src/**/*.js'
      ],
      cache: true,
      concurrency: 5,
      failFast: false,
      timeout: '10s'
    }
  }
  
subject: adjust test config