anchor.diff:    edis_db:run(
       edis_db:process(0),
       #edis_command{cmd = <<"LPOP">>, args = [?KEY],
  -                  timeout = 1000, expire = edis_util:now() + 1,
  -                  group = lists, result_type = multi_bulk}, 1000).
  +                  group = lists, result_type = multi_bulk}).
   
   -spec lpush([binary()]) -> undefined.
   lpush(_Keys) ->
     edis_db:run(
       edis_db:process(0),
       #edis_command{cmd = <<"LPUSH">>, args = [?KEY, ?KEY],
  -                  timeout = 1000, expire = edis_util:now() + 1,
  -                  group = lists, result_type = multi_bulk}, 1000).
  +                  group = lists, result_type = multi_bulk}).
   
   -spec lpushx([binary()]) -> undefined.
   lpushx(_Keys) ->
     edis_db:run(
       edis_db:process(0),
       #edis_command{cmd = <<"LPUSHX">>, args = [?KEY, ?KEY],
  -                  timeout = 1000, expire = edis_util:now() + 1,
  -                  group = lists, result_type = multi_bulk}, 1000).
  +                  group = lists, result_type = multi_bulk}).
  +
  +-spec lrange_s([binary()]) -> undefined.
  +lrange_s([Key|_]) ->
  +  edis_db:run(
  +    edis_db:process(0),
  +    #edis_command{cmd = <<"LRANGE">>,
  +                  args = [?KEY, edis_util:binary_to_integer(Key), edis_util:binary_to_integer(Key)],
  +                  group = lists, result_type = multi_bulk}).
  +
  +-spec lrange_n([binary()]) -> undefined.
  +lrange_n([Key|_]) ->
  +  edis_db:run(
  +    edis_db:process(0),
  +    #edis_command{cmd = <<"LRANGE">>,
  +                  args = [?KEY, 0, edis_util:binary_to_integer(Key)],
  +                  group = lists, result_type = multi_bulk}).
  
positive.code:          init/0, init_per_testcase/1, init_per_round/2,
           quit/0, quit_per_testcase/1, quit_per_round/2]).
  -export([blpop/1, blpop_nothing/1, brpop/1, brpop_nothing/1, brpoplpush/1, lindex/1, linsert/1,
           llen/1, lpop/1, lpush/1, lpushx/1]).
  
  %% ====================================================================
  %% External functions
  
negative.code:         edis_db:process(0),
          #edis_command{cmd = <<"DEL">>, args = [?KEY | Keys], group = keys, result_type = number}),
    ok;
  init_per_round(Fun, Keys) when Fun =:= lindex;
                                 Fun =:= lrange_s;
                                 Fun =:= lrange_n ->
    _ =
      edis_db:run(
        edis_db:process(0),
  