The spec checker now notices when a criterion was reworded and its assertions were not. It could already do this, but only if you knew to hand it a revision to compare against. Without one it said nothing and reported a clean run, so the check was there and almost never ran. It now works out what to compare against on its own — the point your branch left the default branch. Nothing new can fail your build: this check describes what it found and never sets the exit code. Pass --no-since if you want it left alone.