Looking at the error message, I think the failing test is due to galaxyproject/galaxy#15497 , ping @nuwang .

I'll go ahead and merge this anyway, since I think this break a lot of CI pipelines.

Thanks @nsoranzo!

@nsoranzo I just spotted this message. Is there an issue related to galaxyproject/galaxy#15497?

Hi @nuwang , thanks for getting back! Yes, I think so, see this test run (line 2546): https://github.com/galaxyproject/planemo/actions/runs/4365276747/jobs/7633682776#step:8:2547

galaxy.tool_util.provided_metadata INFO 2023-03-08 14:56:58,940 [pN:main.1,p:10159,tN:LocalRunner.work_thread-0] One or more tool outputs is marked as failed ({'type': 'dataset', 'ext': 'data', 'dataset_id': 1, 'stderr': 'Unable to fetch file:///home/runner/work/planemo/planemo/tests/data/hello.txt\nCould not find handler for URI [file:///home/runner/work/planemo/planemo/tests/data/hello.txt]', 'failed': True}).

It seems the file:// protocol is not correctly handled. If you can take a look, that would be great!

I think I see where the issue is originating from and adding file:// as a supported protocol should restore previous behaviour. I'll create a PR with a fix.

I think I see where the issue is originating from and adding file:// as a supported protocol should restore previous behaviour. I'll create a PR with a fix.

That's great, thanks @nuwang !