Hi,
Anomie has written a new structure test[1] that checks whether API
modules have all the proper i18n messages needed for their documentation.
It's possible that your extension's tests will start failing due to
this; if you need help figuring it out, please ping one of us and we can
help out.
[1]
https://gerrit.wikimedia.org/r/#/c/260598/
-- Legoktm