unittest: Disable racy test
unittest: Disable racy test

When run on a slow/busy machine, the notification might happen in 2 or
more batches. It works most of the time, but it's causing the build to
fail intermittently.

chouquette/medialibrary,chouquette/medialibrary,chouquette/medialibrary,chouquette/medialibrary