Are OpenGL ES conformance tests supposed to display any graphics?

I’m running Open GL ES3 conformance tests on Android by invoking ES3 app. From logcat I see that some tests are failed, some are passed, but there is no graphics displayed, ever.
Is this is how the tests are supposed to work?
Thank you,

If you don’t get the result you’re looking for here, you might try posting to the OpenGL ES Developers Forum.