The test completed but there were no successful results

I have configured WPT server on a m/c having access to 2-3 internal sites only and can’t access external urls and comment the installation part in WPT driver to avoid downloading (due to access issues) Now when executing a test it is running fine but no results are generated, getting ‘The test completed but there were no successful results’. Need help in understanding if WPT server accessing any third party contents to generate test results and if yes how it can be fixed as external urls are blocked (due to security policy). Any help is appreciated!