anchor.diff:  
       _Config.
   
  +init_per_group(with_parallelism, Config) ->
  +    [{parallelism, 5}] ++ Config;
   init_per_group(with_tls, Config) ->
       TLSOpts = make_certs(Config),
  -    [{tls, true}] ++ TLSOpts ++ Config;
  +    [{parallelism, 1}, {tls, true}] ++ TLSOpts ++ Config;
   init_per_group(_, _Config) ->
       _Config.
   
  
positive.code:        hyparview_manager_high_client_test]},
  
       {with_tls, [],
        [default_manager_test]}
      ].
  
  
negative.code:                           [max_active_size, MaxActiveSize]),
  
              ok = rpc:call(Node, partisan_config, set, [tls, ?config(tls, Config)]),
              ok = rpc:call(Node, partisan_config, set, [parallelism, ?config(parallelism, Config)]),
  
              Servers = proplists:get_value(servers, Options, []),
              Clients = proplists:get_value(clients, Options, []),
  