Improve tests
Improve tests

These are tests based upon a labeling of sequences I did before. It
should be a good set of more detailed RNA types to try to achieve.

RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline,RNAcentral/rnacentral-import-pipeline