test "$UNAME" = "Linux" || skip
-clean_scratch
-"$XTOUCH" scratch/{file,null}
+cd "$TEST"
+"$XTOUCH" file null
-bfs_sudo mount --bind /dev/null scratch/null || skip
-defer bfs_sudo umount scratch/null
+bfs_sudo mount --bind /dev/null null || skip
+defer bfs_sudo umount null
-bfs_diff scratch -type c
+bfs_diff . -type c