Puppeteer can not launch on Ubuntu

[joe223]

Steps to reproduce

Tell us about your environment:

• Puppeteer version: "puppeteer": "^1.20.0",
• Platform / OS version: Linux DESKTOP-6HBSU4T 4.4.0-18362-Microsoft Drop setBlockedURLs, use request.abort instead #1-Microsoft Mon Mar 18 12:02:00 PST 2019 x86_64 x86_64 x86_64 GNU/Linux

No LSB modules are available. 
Distributor ID: Ubuntu 
Description:    Ubuntu 18.04.3 LTS
Release:        18.04                                                                                                              
Codename:       bionic 

• URLs (if applicable):
• Node.js version: v10.16.3

What steps will reproduce the problem?

Please include code that reproduces the issue.

1. Run test case in Mocha, this is the setup

const path = require('path')
const expect = require('expect')
const puppeteer = require('puppeteer')
const createServer = require('./createServer')

const server = createServer()
const globalVariables = {
    browser: global.browser,
    expect: global.expect,
    entryPath: global.entryPath
}
const opts = {
    headless: true,
    timeout: 10000
}

before (async function () {
    global.expect = expect
    global.browser = await puppeteer.launch(opts)
    global.entryPath = `http://localhost:${server.address().port}/test/index.html`
})

after (function () {
    server.close()
    browser.close()
    global.browser = globalVariables.browser
    global.expect = globalVariables.expect
    global.entryPath = globalVariables.entryPath
})

test case test/unit/init.spec.js:

describe('Initialization', function () {
    let page = null

    before(async function () {
        page = await browser.newPage()
        await page.goto(global.entryPath)
    })

    after(async function () {
        await page.close()
    })

    beforeEach(async function () {
        await page.reload({
            timeout: 1000,
            waitUntil: 'load'
        })
    })

    it('default setup', function () {
        expect(true).toBeTruthy()
    })
})

npm script:

"test": "mocha test/setup.js test/**/*.spec.js"

setup_puppeteer.sh file

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install -yq gconf-service libasound2 libatk1.0-0 libc6 libcairo2 libcups2 libdbus-1-3 \
    libexpat1 libfontconfig1 libgcc1 libgconf-2-4 libgdk-pixbuf2.0-0 libglib2.0-0 libgtk-3-0 libnspr4 \
    libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 \
    libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 \
    ca-certificates fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils wget --fix-missing

2. run setup_puppeteer.sh before npm install
3. run npm run test

What is the expected result?
Test should pass

What happens instead?
this is terminal info:

Test server is running at: 3639


  1) "before all" hook in "{root}"
  2) "after all" hook in "{root}"

  0 passing (2s)
  1 failing

  1) "before all" hook in "{root}":
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.


  2) "after all" hook in "{root}":
     ReferenceError: browser is not defined
      at Context.<anonymous> (test/setup.js:25:5)                                                                        

It same with #3443 , but I had install puppeteer dependencies.

This is CI log https://travis-ci.com/joe223/tiny-swiper/jobs/248144769

[joe223]

Update
This information is important Error: Timeout of 2000ms exceeded.
So I change timeout to 10000ms , the problem is gone.
Maybe TravisCI's computer performance is too low ?