anchor.diff:      flush_msgs().
   
   filter_keys_test() ->
  +    clean_test_dirs(),
       {S, B, K} = backend_with_known_key(riak_kv_memory_backend),
       Caller1 = new_result_listener(keys),
       handle_coverage(?KV_LISTKEYS_REQ{bucket=B,
  
positive.code: list_buckets_test_() ->
      {foreach,
       fun() ->
               application:start(sasl),
               Env = application:get_all_env(riak_kv),
               application:start(folsom),
  
negative.code: eleveldb_test_dir() ->
      "./test.eleveldb-temp-data".
  
  clean_test_dirs() ->
      ?cmd("rm -rf " ++ bitcask_test_dir()),
      ?cmd("rm -rf " ++ eleveldb_test_dir()).
  
  backend_with_known_key(BackendMod) ->
      dummy_backend(BackendMod),
  