anchor.diff:  
   init_per_testcase(TestCase, Config) ->
       case TestCase of
  +        rbr_concurrency_kv ->
  +            %% stop ring from previous test case (it may have run into a timeout
  +            unittest_helper:stop_ring(),
  +            {priv_dir, PrivDir} = lists:keyfind(priv_dir, 1, Config),
  +            Size = randoms:rand_uniform(2, 14),
  +            unittest_helper:make_ring(Size, [{config, [{log_path, PrivDir}]}]),
  +            %% necessary for the consistency check:
  +            unittest_helper:check_ring_size_fully_joined(Size),
  +            Config;
  +        rbr_concurrency_leases ->
  +            %% stop ring from previous test case (it may have run into a timeout
  +            unittest_helper:stop_ring(),
  +            {priv_dir, PrivDir} = lists:keyfind(priv_dir, 1, Config),
  +            Size = 1, %%randoms:rand_uniform(2, 14),
  +            unittest_helper:make_ring(Size, [{config, [{log_path, PrivDir},
  +                                                       {leases, true}]}]),
  +            %% necessary for the consistency check:
  +            unittest_helper:check_ring_size_fully_joined(Size),
  +            Config;
           rbr_consistency ->
               %% stop ring from previous test case (it may have run into a timeout
               unittest_helper:stop_ring(),
  
positive.code: end_per_testcase(_TestCase, Config) ->
      unittest_helper:stop_ring(),
      Config.
  
  rbr_consistency(_Config) ->
      %% create an rbr entry
  
negative.code: -include("client_types.hrl").
  
  all()   -> [
              %%rbr_concurrency_kv,
              %%rbr_concurrency_leases%, %% not yet ready to run
              %%rbr_consistency,
              tester_type_check_rbr
             ].
  suite() -> [ {timetrap, {seconds, 400}} ].
  