anchor.diff:  
   ping_interval() ->
       aeu_env:user_config_or_env([<<"sync">>, <<"ping_interval">>],
  -                               aecore, ping_interval, 120000).
  +                               aecore, ping_interval, 5000).
   
   try_until(MSec, F) ->
       try F()
  
positive.code:     Length = 30,
      StartupTimeout = proplists:get_value(node_startup_time, Cfg),
      NodeConfig = #{
          ping_interval => 30000,
          max_inbound => 2
      },
      setup([?NODE1, ?NODE2, ?NODE3, ?NODE4], NodeConfig, Cfg),
  
negative.code:                 ?assertNotEqual(undefined, B1a)
              end),
  
      % Ensure a ping between start node3 and starting next.
      TimeForPing1 = max(0, ping_interval() - (erlang:system_time(millisecond) - T1)),
      timer:sleep(TimeForPing1),
  
      % Start 4th node that should get disconnected from node1 and connect to another one.
  