anchor.diff:      ok = partisan_trace_orchestrator:enable(),
   
       %% Set replay.
  -    partisan_config:set(replaying, true),
  +    partisan_config:set(replaying, Replaying),
   
       %% Set shrinking.
  -    partisan_config:set(shrinking, true),
  -
  -    %% Perform preloads.
  -    ok = partisan_trace_orchestrator:perform_preloads(Nodes),
  +    partisan_config:set(shrinking, Shrinking),
  +
  +    %% Perform preloads.    
  +    case PerformPreloads of 
  +        true ->
  +            ok = partisan_trace_orchestrator:perform_preloads(Nodes);
  +        false ->
  +            ok
  +    end,
   
       %% Identify trace.
       TraceRandomNumber = rand:uniform(100000),
  
positive.code:         _ ->
              true
      end.
  %% @private
  classification_explored(Classification, ClassificationsExplored) ->
      case Classification of 
  
negative.code: %% Test Runner
  %% ===================================================================
  
  execute(Nodes, PerformPreloads, Replaying, Shrinking, Tracing, {M, F, A}) ->
      %% Ensure replaying option is set.
      lists:foreach(fun({ShortName, _}) ->
          ok = rpc:call(?NAME(ShortName), partisan_config, set, [replaying, Replaying])
      end, Nodes),
  
      %% Ensure shrinking option is set.
      lists:foreach(fun({ShortName, _}) ->
          ok = rpc:call(?NAME(ShortName), partisan_config, set, [shrinking, Shrinking])
      end, Nodes),
  
      %% Deterministically seed the random number generator.
  