Docker containers for tests
Currently, all our tests are run either on developer's box directly (which requires installation of many different packages and maintaining their versions), or at the CI (which relies on individual CI images + configurations, and is not very easy to replicate on developers' side).

@13rac1 has an interesting proposal: leveraging Docker containers to help people run these tests easier. Here's POC: https://github.com/kaitai-io/kaitai_struct/commit/dc959d9079c841c55cdba539dcd6b0d2f42df741