phantomjs issue with unicode(utf8)

[ghost]

I'm trying to run a test using codeception. webdriver and phantomjs 2.11.
I write the below line for my test which contains Farsi characters.

$I->see('کمپین بنری');

my test pass using php browser and fail using phantomjs. I commented that line and the test passed with phantomjs as well. so phantomjs doesn't support unicode.

phantomjs.exe --webdriver=4444 --output-encoding=utf8

I find it on Command-line Options

Operating System: Windows 8

Suite configuration:

class_name: AcceptanceTester
modules:
    enabled:
        - WebDriver:
            url: http://platform.xxxx-local.ir
            browser: phantomjs
        - \Helper\Acceptance

[ariya]

We do not plan to support WebDriver anymore (#15399).