anchor.diff:                            end, fun(_P1, P2) -> P2 end),
       ?equals(OnlyNew, []),
   %%     ct:pal("~p~n", [erlang:memory()]),
  -    check_memory_inc(PrevMemInfo, NewMemInfo, 0, 0),
  +    check_memory_inc_ring(PrevMemInfo, NewMemInfo, 0, 0),
       ok.
   
   add_remove_nodes_50(_Config) ->
  
positive.code:     ?equals(OnlyNew, []),
  %%     ct:pal("~p~n", [erlang:memory()]),
      % TODO: add memory check? (process state may increase, e.g. dead nodes in fd)
  %%     check_memory_inc(PrevMemInfo, NewMemInfo, 0, 0),
      ok.
  
  %% @doc Starts garbage collection for all processes.
  
negative.code:     ?equals(OnlyNew, []),
  %%     ct:pal("~p~n", [erlang:memory()]),
      % TODO: add memory check? (process state may increase, e.g. dead nodes in fd)
  %%     check_memory_inc_ring(PrevMemInfo, NewMemInfo, 0, 0),
      ok.
  
  add_kill_nodes_50(_Config) ->
  