message: Fix post-merge test regression.
diff: @@ -97,7 +97,7 @@ where
  );
  // We expect only the vertex purge timer, participation log timer and `Ping` outcomes.
  // If there are more, the tests might need to handle them.
  - assert_eq!(3, outcomes.len());
  + assert_eq!(4, outcomes.len());
  hw_proto
  }
  