diff --git a/apps/emqx/test/emqx_common_test_helpers.erl b/apps/emqx/test/emqx_common_test_helpers.erl
index 1d0d793bd..ac8659735 100644
--- a/apps/emqx/test/emqx_common_test_helpers.erl
+++ b/apps/emqx/test/emqx_common_test_helpers.erl
@@ -16,8 +16,6 @@
 
 -module(emqx_common_test_helpers).
 
--include_lib("common_test/include/ct.hrl").
-
 -type special_config_handler() :: fun().
 
 -type apps() :: list(atom()).
@@ -78,12 +76,6 @@
 
 -define(CERTS_PATH(CertName), filename:join(["etc", "certs", CertName])).
 
--define(MQTT_SSL_TWOWAY, [
-    {cacertfile, ?CERTS_PATH("cacert.pem")},
-    {verify, verify_peer},
-    {fail_if_no_peer_cert, true}
-]).
-
 -define(MQTT_SSL_CLIENT_CERTS, [
     {keyfile, ?CERTS_PATH("client-key.pem")},
     {cacertfile, ?CERTS_PATH("cacert.pem")},
diff --git a/apps/emqx/test/emqx_router_helper_SUITE.erl b/apps/emqx/test/emqx_router_helper_SUITE.erl
index 875ec8b6c..20c94087a 100644
--- a/apps/emqx/test/emqx_router_helper_SUITE.erl
+++ b/apps/emqx/test/emqx_router_helper_SUITE.erl
@@ -19,7 +19,6 @@
 -compile(export_all).
 -compile(nowarn_export_all).
 
--include("emqx.hrl").
 -include_lib("eunit/include/eunit.hrl").
 -include_lib("common_test/include/ct.hrl").
 -include_lib("snabbkaffe/include/snabbkaffe.hrl").
diff --git a/apps/emqx/test/emqx_shared_sub_SUITE.erl b/apps/emqx/test/emqx_shared_sub_SUITE.erl
index 7c38fdf17..a428a6fa9 100644
--- a/apps/emqx/test/emqx_shared_sub_SUITE.erl
+++ b/apps/emqx/test/emqx_shared_sub_SUITE.erl
@@ -21,8 +21,6 @@
 
 -include_lib("emqx/include/emqx.hrl").
 -include_lib("eunit/include/eunit.hrl").
--include_lib("common_test/include/ct.hrl").
--include_lib("snabbkaffe/include/snabbkaffe.hrl").
 
 -define(SUITE, ?MODULE).
 
diff --git a/apps/emqx_conf/test/emqx_conf_app_SUITE.erl b/apps/emqx_conf/test/emqx_conf_app_SUITE.erl
index a3787fe6e..fcf65046d 100644
--- a/apps/emqx_conf/test/emqx_conf_app_SUITE.erl
+++ b/apps/emqx_conf/test/emqx_conf_app_SUITE.erl
@@ -19,10 +19,7 @@
 -compile(export_all).
 -compile(nowarn_export_all).
 
--include("emqx_conf.hrl").
 -include_lib("eunit/include/eunit.hrl").
--include_lib("common_test/include/ct.hrl").
--include_lib("snabbkaffe/include/snabbkaffe.hrl").
 
 all() ->
     emqx_common_test_helpers:all(?MODULE).