anchor.diff:      case proplists:get_value(spec, Opts) of
           undefined ->
               case {proplists:get_value(suite, Opts), proplists:get_value(dir, Opts)} of
  +                {undefined, undefined}  -> {error, "One of the common_test parameters suite and dir must be set"};
                   {Suites, undefined} -> set_compile_dirs(State, Apps, {suite, Suites});
                   {undefined, Dirs}   -> set_compile_dirs(State, Apps, {dir, Dirs});
                   {Suites, Dir} when is_integer(hd(Dir)) ->
  
positive.code: prepare_tests(State) ->
      %% command line test options
      CmdOpts = cmdopts(State),
      %% rebar.config test options
      CfgOpts = cfgopts(State),
      ProjectApps = rebar_state:project_apps(State),
  
negative.code:     rebar_utils:reread_config(Configs, [update_logger]),
  
      Opts = merge_opts(CmdOpts,CfgOpts),
      ?DEBUG("OPTS AFTER SELECT: ~p", [Opts]),
      discover_tests(State, ProjectApps, Opts).
  
  %% Merge the option lists from command line and rebar.config:
  