Even if our tests suite is still compatible and working with v6 since #658, there are many changes in v6 that might worth some investigations: https://github.com/pester/Pester/releases/tag/6.0.0

1. https://github.com/pester/Pester/releases/tag/6.0.0#new-should--assertions
2. https://github.com/pester/Pester/releases/tag/6.0.0#richer-failure-messages-and-output

If there is appetite and for contributors that know what they're doing and/or have access to a Windows machine to run tests locally without relying too much on CI, there is also this one that could be interesting:
3) https://github.com/pester/Pester/releases/tag/6.0.0#parallel-test-execution-experimental