diff --git a/zfs-backup.py b/zfs-backup.py
index 84057ef..b36895f 100755
--- a/zfs-backup.py
+++ b/zfs-backup.py
@@ -272,6 +272,7 @@ class ZFS:
         if wait_for_finish:
             # TODO make Ctrl-c interrupt this
             run_command([config.ZPOOL, "wait", "-t", "scrub", pool])
+    # TODO raise error if pool is not healthy
 
 
 class Disk: