Mink failing to run JavascriptTestBase tests
There's an annoying bug with the Selenium2Driver code with regards to specifying the correct browser. If no capabilities are specified, it uses the defaults:

    public function setDesiredCapabilities($desiredCapabilities = null)
    {
        if (null === $desiredCapabilities) {
            $desiredCapabilities = self::getDefaultCapabilities();
        }


Note in the error it hase browser defaulted to firefox while the browserName is correctly set to chrome:

Capabilities {browser: firefox, browserName: chrome,


In order to workaround this issue, change your capabilities to also specify browser:

&lt;env name="MINK_DRIVER_ARGS_WEBDRIVER" value='["chrome", {"browser": "chrome"}, "http://selenium:4444/wd/hub"]'/&gt;