Is it possible to hide the traceback of the tests and just show the message from the assertion of the test that failed? Showing all this output to students will likely be quite confusing and it also allows them to see exactly what is tested which to me is less desired than just showing the assertion message with a hint of what is wrong. This is a bigger problem when there are multiple assertions in the same cell.

I have seen the fail_message option in the question metadata, but it does not suppress the traceback and requires manually inputting the same string that is already in my assertion message so it is not ideal.