Selenium ERR_NAME_NOT_RESOLVED on heroku with mobile testing

I'd like to test multiple mobile user agents with selenium and chrome. I'm using python 3.6 and deploying to heroku. Based on http://chromedriver.chromium.org/mobile-emulation , I have:

def some_long_calculation():
    driver = create_chromedriver('kkk')
    # driver = create_chromedriver()

    driver.get("https://www.yahoo.com/")
    .....

and :

def create_chromedriver(ua=False):
    options = webdriver.ChromeOptions()
    CHROMEDRIVER_PATH = os.getenv('$HOME') or basedir+'/chromedriver.exe'
    FLASK_CONFIG = os.getenv('FLASK_CONFIG')

    if ua:

        mobile_emulation = {"deviceName": "Nexus 5"}
        options.add_experimental_option("mobileEmulation", mobile_emulation)


    if FLASK_CONFIG and FLASK_CONFIG == "production":
        CHROMEDRIVER_PATH = '/app/.chromedriver/bin/chromedriver'
        GOOGLE_CHROME_SHIM = os.getenv('$GOOGLE_CHROME_SHIM') or 'no path found'
        options.binary_location = '/app/.apt/usr/bin/google-chrome-stable'

        options.add_argument('--disable-gpu')
        options.add_argument('--no-sandbox')

    return webdriver.Chrome(executable_path=CHROMEDRIVER_PATH, options=options)  

If I run it locally with the mobile browser enabled It works as expected:

If I run it on heroku with the mobile browser enabled :

Then I tried it on heroku with the mobile user disabled I get:

So at least I know the setup is working as far as chrome and chromedriver.
heroku Logs:

2018-07-15T17:37:53.967643+00:00 app[web.1]:     driver = create_chromedriver('kkk')
2018-07-15T17:37:53.967637+00:00 app[web.1]:     png = some_long_calculation()
2018-07-15T17:37:53.967645+00:00 app[web.1]:   File "/app/app/main/cl.py", line 120, in 
create_chromedriver
2018-07-15T17:37:53.967640+00:00 app[web.1]:   File "/app/app/main/cl.py", line 123, 
in some_long_calculation
2018-07-15T17:37:53.967648+00:00 app[web.1]:     return webdriver.Chrome(executable_
path=CHROMEDRIVER_PATH, options=options)
2018-07-15T17:37:53.967651+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.
6/site-packages/selenium/webdriver/chrome/webdriver.py", line 75, in __init__
2018-07-15T17:37:53.967654+00:00 app[web.1]:     desired_capabilities=desired_capabilities)
2018-07-15T17:37:53.967656+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6
/site-packages/selenium/webdriver/remote/webdriver.py", line 156, in __init__
2018-07-15T17:37:53.967659+00:00 app[web.1]:     self.start_session(capabilities, 
browser_profile)
2018-07-15T17:37:53.967661+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/
site-packages/selenium/webdriver/remote/webdriver.py", line 251, in start_session
2018-07-15T17:37:53.967669+00:00 app[web.1]:     response = self.command_executor.
execute(driver_command, params)
2018-07-15T17:37:53.967664+00:00 app[web.1]:     response = self.execute(Command.
NEW_SESSION, parameters)
2018-07-15T17:37:53.967667+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/
site-packages/selenium/webdriver/remote/webdriver.py", line 318, in execute
2018-07-15T17:37:53.967672+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6
/site-packages/selenium/webdriver/remote/remote_connection.py", line 472, in execute
2018-07-15T17:37:53.967674+00:00 app[web.1]:     return self._request(command_info[0],
 url, body=data)
2018-07-15T17:37:53.967677+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3
.6/site-packages/selenium/webdriver/remote/remote_connection.py", line 496, in _request
2018-07-15T17:37:53.967679+00:00 app[web.1]:     resp = self._conn.getresponse()
2018-07-15T17:37:53.967682+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.
6/http/client.py", line 1331, in getresponse
2018-07-15T17:37:53.967685+00:00 app[web.1]:     response.begin()
2018-07-15T17:37:53.967687+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.
6/http/client.py", line 297, in begin
2018-07-15T17:37:53.967695+00:00 app[web.1]:     line = str(self.fp.readline(_MAXLINE + 1),
 "iso-8859-1")
2018-07-15T17:37:53.967690+00:00 app[web.1]:     version, status, reason = self
._read_status()
2018-07-15T17:37:53.967698+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/
socket.py", line 586, in readinto
2018-07-15T17:37:53.967692+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6
/http/client.py", line 258, in _read_status
2018-07-15T17:37:53.967700+00:00 app[web.1]:     return self._sock.recv_into(b)
2018-07-15T17:37:53.967712+00:00 app[web.1]: ConnectionResetError: [Errno 104] 
Connection reset by peer

How can I fix this?


from Selenium ERR_NAME_NOT_RESOLVED on heroku with mobile testing