Right now we have a "sleep 2" workaround in the FUSE tests (pending refactor of BIGTOP-1221).
We can remove that once HADOOP-3679 is patched (implementation of FUSE consistency).
Alternatively, we can keep the sleep command and make it configurable.
Also there are other tests which should be added as optional (chmod, chown, ... ). These are all useful when testing the implementation of a FUSE mounted file system over a DFS.