Chromedriver, Selenium - Download Automation

I am using Selenium 2.43.0 with Python 2.7.5. At some point, the test clicks a button that sends information about the form to the server. If the request is successful, the server responds

1) Successful message

2) PDF with information about the form, combined into

I don't need to validate the PDF, my test is just looking for a successful message. However, the PDF is part of the package response from the server, which I, as a tester, cannot change.

Until recently, this was never a problem when using Chromedriver, as Chrome automatically downloaded pdf files to its default folder.

However, a few days ago, one of my test environments started showing up in a separate window with a Print screen for pdfs, which nullified my tests.

I don't need or need this dialogue. How can I suppress this dialog programmatically using the chrome options? (Something that is equivalent to the FireFox options pdfjs.disable

in about:config

).

Here is my current attempt at bypassing a dialog not working ("not working" does not disable or close the pdf print dialog):

    dc = DesiredCapabilities.CHROME
    dc['loggingPrefs'] = {'browser': 'ALL'}

    chrome_profile = webdriver.ChromeOptions()
    profile = {"download.default_directory": "C:\\SeleniumTests\\PDF",
               "download.prompt_for_download": False,
               "download.directory_upgrade": True}
    chrome_profile.add_experimental_option("prefs", profile)
    chrome_profile.add_argument("--disable-extensions")
    chrome_profile.add_argument("--disable-print-preview")

    self.driver = webdriver.Chrome(executable_path="C:\\SeleniumTests\\chromedriver.exe",
                                       chrome_options=chrome_profile,
                                       service_args=["--log-path=C:\\SeleniumTests\\chromedriver.log"],
                                       desired_capabilities=dc)

      

        
        
        
      

    

All component versions are the same in both test environments:

Selenium 2.43.0, Python 2.7.5, Chromedriver 2.12, Chrome (browser) 38.0.02125.122