subunit 1.4.0-0ubuntu1 (arm64 binary) in ubuntu focal

 subunit is a protocol for test activity serialisation deserialisation. This
 permits executing tests remotely, or saving the result of test runs for later
 introspection.
 .
 The subunit package includes the subunit command line tools:
 subunit-diff, subunit-filter subunit-stats tap2subunit subunit2pyunit
 subunit-ls subunit-tags, subunit2gtk