anchor.diff:          interval => ?cfg(mine_interval)
       }),
       Tag = io_lib:format("local-h~b", [Height]),
  +    stop_node(n1, 60000, Cfg), %% Ensure DB synced to disk.
       Ref = aest_nodes:export(n1, Tag, Cfg),
       [kill_node(N, Cfg) || N <- Nodes],
   
  
positive.code: % Test cases
  -export([
      startup_speed/1,
      sync_speed/1,
      stay_in_sync/1
  ]).
  
negative.code:     spec/3,
      setup_nodes/2,
      start_node/2,
      stop_node/3,
      kill_node/2,
      request/3,
      wait_for_value/4,
  