Screen Resolution when starting gitlab-runner windows

We are facing issues when trying to run the UI testing framework. We need to have the screen resolution set at 1920 * 1080. We cannot run with the -headless flag as some of the tests will pass in headless but fail in actually using the UI.

Is there a way to set the default screen resolution when trying to start the runner? We have tried to start the running via a Powershell but it gives us a message saying that the runner service has not been started.