The Timed Text Working Group just discussed IMSC 1.1 tests imsc-tests#67.
The full IRC log of that discussion
<nigel> Topic: IMSC 1.1 tests imsc-tests#67
<nigel> github: https://github.com/w3c/imsc-tests/pull/67
<nigel> Nigel: What's the scope of these?
<nigel> Pierre: They are intended to cover TTML2 features that are present in IMSC 1.1 that were
<nigel> .. not present in IMSC 1.0.1. They are not intended to be CR exit criteria tests, but tests
<nigel> .. to assist implementers. There are source files and PNG renders, following exactly the
<nigel> .. same pattern as the IMSC 1 tests.
<nigel> Nigel: Sounds good to me.
<nigel> .. I've approved them so they can be merged.
<nigel> .. Thanks for those.
<nigel> .. This is a really good resource.
<nigel> Pierre: It's to help implementers check their implementations are behaving correctly.
Covers features added to IMSC 1.1