AVA's watcher may be watching both source files and the TypeScript build output. It must watch the source files, otherwise it won't know to rerun tests. But there's no point in rerunning tests until the build output has changed.

Delaying the watcher may work but this is not configurable. Perhaps if the watcher could figure out it should wait for a rewritten path to be updated too that may work. It'll require changes to how AVA and this package interact.