diff --git a/apps/emqx_lua_hook/test/emqx_lua_hook_SUITE.erl b/apps/emqx_lua_hook/test/emqx_lua_hook_SUITE.erl
index c47083ae0..f2f4ad8d0 100644
--- a/apps/emqx_lua_hook/test/emqx_lua_hook_SUITE.erl
+++ b/apps/emqx_lua_hook/test/emqx_lua_hook_SUITE.erl
@@ -141,7 +141,6 @@ case11(_Config) ->
     Msg = #message{qos = 2, flags = #{retain => true}, topic = <<"a/b/c">>, payload = <<"123">>, headers = #{}},
     Ret = emqx_hooks:run_fold('message.delivered', [#{clientid => <<"myclient">>, username => <<"myuser">>}], Msg),
     ?assertEqual(Msg, Ret),
-    emqx_lua_hook:stop(),
     ok = file:delete(ScriptName).
 
 case12(_Config) ->
@@ -203,7 +202,6 @@ case22(_Config) ->
     Msg = #message{qos = 2, flags = #{retain => true}, topic = <<"a/b/c">>, payload = <<"123">>, headers = #{}},
     Ret = emqx_hooks:run('message.acked', [#{clientid => <<"myclient">>, username => <<"myuser">>}, Msg]),
     ?assertEqual(ok, Ret),
-    emqx_lua_hook:stop(),
     ok = file:delete(ScriptName).
 
 case31(_Config) ->
diff --git a/apps/emqx_lwm2m/test/emqx_lwm2m_SUITE.erl b/apps/emqx_lwm2m/test/emqx_lwm2m_SUITE.erl
index 37b7f298d..a77a44dfe 100644
--- a/apps/emqx_lwm2m/test/emqx_lwm2m_SUITE.erl
+++ b/apps/emqx_lwm2m/test/emqx_lwm2m_SUITE.erl
@@ -188,9 +188,9 @@ case01_register(Config) ->
     #coap_message{type = ack, id = RspId3, method = Method3} = test_recv_coap_response(UdpSock),
     {ok,deleted} = Method3,
     MsgId3 = RspId3,
+    timer:sleep(50),
     false = lists:member(SubTopic, test_mqtt_broker:get_subscrbied_topics()).
 
-
 case01_register_additional_opts(Config) ->
     % ----------------------------------------
     % REGISTER command
@@ -236,6 +236,7 @@ case01_register_additional_opts(Config) ->
     #coap_message{type = ack, id = RspId3, method = Method3} = test_recv_coap_response(UdpSock),
     {ok,deleted} = Method3,
     MsgId3 = RspId3,
+    timer:sleep(50),
     false = lists:member(SubTopic, test_mqtt_broker:get_subscrbied_topics()).
 
 case01_register_incorrect_opts(Config) ->
@@ -316,6 +317,7 @@ case01_register_report(Config) ->
     #coap_message{type = ack, id = RspId3, method = Method3} = test_recv_coap_response(UdpSock),
     {ok,deleted} = Method3,
     MsgId3 = RspId3,
+    timer:sleep(50),
     false = lists:member(SubTopic, test_mqtt_broker:get_subscrbied_topics()).
 
 case02_update_deregister(Config) ->
@@ -395,7 +397,7 @@ case02_update_deregister(Config) ->
     {ok,deleted} = Method3,
     MsgId3 = RspId3,
 
-    timer:sleep(100),
+    timer:sleep(50),
     false = lists:member(SubTopic, test_mqtt_broker:get_subscrbied_topics()).
 
 case03_register_wrong_version(Config) ->