anchor.diff:        [default_manager_test]},
        
        {with_channels, [],
  +      [default_manager_test]},
  +
  +     {with_no_channels, [],
         [default_manager_test]},
   
        {with_monotonic_channels, [],
  
positive.code:      {group, with_parallelism, [parallel]},
  
       {group, with_channels, [parallel]},
       
       {group, with_monotonic_channels, [parallel]},
  
  
negative.code:     [{parallelism, 1}, {channels, [vnode, gossip]}] ++ Config;
  init_per_group(with_parallelism, Config) ->
      [{parallelism, 5}, {channels, ?CHANNELS}] ++ Config;
  init_per_group(with_no_channels, Config) ->
      [{parallelism, 1}, {channels, []}] ++ Config;
  init_per_group(with_tls, Config) ->
      TLSOpts = make_certs(Config),
      [{parallelism, 1}, {tls, true}] ++ TLSOpts ++ Config;
  