anchor.diff:      do_atom_roundtrip(Node, AtomData),
       stop_node(Node),
       ok.
  -
  -atom_roundtrip_r16b(Config) when is_list(Config) ->
  -    case test_server:is_release_available("r16b") of
  -        true ->
  -            ct:timetrap({minutes, 6}),
  -            AtomData = unicode_atom_data(),
  -            verify_atom_data(AtomData),
  -            case start_node(Config, [], "r16b") of
  -                {ok, Node} ->
  -                    do_atom_roundtrip(Node, AtomData),
  -                    stop_node(Node);
  -                {error, timeout} ->
  -                    {skip,"Unable to start OTP R16B release"}
  -            end;
  -        false ->
  -            {skip,"No OTP R16B available"}
  -    end.
   
   unicode_atom_roundtrip(Config) when is_list(Config) ->
       AtomData = unicode_atom_data(),
  
positive.code:          dist_parallel_send/1,
           atom_roundtrip/1,
           unicode_atom_roundtrip/1,
           atom_roundtrip_r16b/1,
           contended_atom_cache_entry/1,
           contended_unicode_atom_cache_entry/1,
           bad_dist_structure/1,
  
negative.code:      ref_port_roundtrip, nil_roundtrip, stop_dist,
       {group, trap_bif}, {group, dist_auto_connect},
       dist_parallel_send, atom_roundtrip, unicode_atom_roundtrip,
       contended_atom_cache_entry, contended_unicode_atom_cache_entry,
       {group, message_latency},
       {group, bad_dist}, {group, bad_dist_ext},
  