global.process = { __proto__: process, pid: 123456 } Date.now = function () { return 1459875739796 } require('os').hostname = function () { return 'abcdefghijklmnopqr' } var pino = require(require.resolve('./../../../')) var log = pino({ prettyPrint: true }) log.info('h') process.once('beforeExit', pino.final(log, (_, logger) => { logger.info('beforeExit') }))