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 }).child({ a: 1 }) log.info('h') log.child({ b: 2 }).info('h3') setTimeout(() => log.info('h2'), 200)