diff --git a/src/emqx_broker.erl b/src/emqx_broker.erl
index 6556a59e5..a2ddf5b60 100644
--- a/src/emqx_broker.erl
+++ b/src/emqx_broker.erl
@@ -34,6 +34,11 @@
 -export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2,
          code_change/3]).
 
+-ifdef(TEST).
+-compile(export_all).
+-compile(nowarn_export_all).
+-endif.
+
 -define(BROKER, ?MODULE).
 
 %% ETS tables
diff --git a/src/emqx_hooks.erl b/src/emqx_hooks.erl
index b2eb0d6f4..55b2476ee 100644
--- a/src/emqx_hooks.erl
+++ b/src/emqx_hooks.erl
@@ -42,7 +42,7 @@
 
 -spec(start_link() -> emqx_types:startlink_ret()).
 start_link() ->
-    gen_server:start_link({local, ?SERVER}, ?MODULE, [], [{hibernate_after, 60000}]).
+    gen_server:start_link({local, ?SERVER}, ?MODULE, [], [{hibernate_after, 1000}]).
 
 -spec(stop() -> ok).
 stop() ->
diff --git a/src/emqx_pool.erl b/src/emqx_pool.erl
index 762f5dc6d..7b12bea69 100644
--- a/src/emqx_pool.erl
+++ b/src/emqx_pool.erl
@@ -35,7 +35,8 @@ start_link() ->
 %% @doc Start pool.
 -spec(start_link(atom(), pos_integer()) -> emqx_types:startlink_ret()).
 start_link(Pool, Id) ->
-    gen_server:start_link({local, emqx_misc:proc_name(?MODULE, Id)}, ?MODULE, [Pool, Id], []).
+    gen_server:start_link({local, emqx_misc:proc_name(?MODULE, Id)},
+                          ?MODULE, [Pool, Id], [{hibernate_after, 1000}]).
 
 %% @doc Submit work to the pool.
 -spec(submit(task()) -> any()).