diff --git a/apps/emqx_coap/test/emqx_coap_SUITE.erl b/apps/emqx_coap/test/emqx_coap_SUITE.erl
index ed59b309c..444bcc064 100644
--- a/apps/emqx_coap/test/emqx_coap_SUITE.erl
+++ b/apps/emqx_coap/test/emqx_coap_SUITE.erl
@@ -28,16 +28,16 @@
 all() -> emqx_ct:all(?MODULE).
 
 init_per_suite(Config) ->
-    emqx_ct_helpers:start_apps([emqx_coap], fun set_sepecial_cfg/1),
+    emqx_ct_helpers:start_apps([emqx_coap], fun set_special_cfg/1),
     Config.
 
-set_sepecial_cfg(emqx_coap) ->
+set_special_cfg(emqx_coap) ->
     Opts = application:get_env(emqx_coap, dtls_opts,[]),
     Opts2 = [{keyfile, emqx_ct_helpers:deps_path(emqx, "etc/certs/key.pem")},
              {certfile, emqx_ct_helpers:deps_path(emqx, "etc/certs/cert.pem")}],
     application:set_env(emqx_coap, dtls_opts, emqx_misc:merge_opts(Opts, Opts2)),
     application:set_env(emqx_coap, enable_stats, true);
-set_sepecial_cfg(_) ->
+set_special_cfg(_) ->
     ok.
 
 end_per_suite(Config) ->
diff --git a/apps/emqx_coap/test/emqx_coap_pubsub_SUITE.erl b/apps/emqx_coap/test/emqx_coap_pubsub_SUITE.erl
index 7f49ece7b..1aaf6cb69 100644
--- a/apps/emqx_coap/test/emqx_coap_pubsub_SUITE.erl
+++ b/apps/emqx_coap/test/emqx_coap_pubsub_SUITE.erl
@@ -28,12 +28,12 @@
 all() -> emqx_ct:all(?MODULE).
 
 init_per_suite(Config) ->
-    emqx_ct_helpers:start_apps([emqx_coap], fun set_sepecial_cfg/1),
+    emqx_ct_helpers:start_apps([emqx_coap], fun set_special_cfg/1),
     Config.
 
-set_sepecial_cfg(emqx_coap) ->
+set_special_cfg(emqx_coap) ->
     application:set_env(emqx_coap, enable_stats, true);
-set_sepecial_cfg(_) ->
+set_special_cfg(_) ->
     ok.
 
 end_per_suite(Config) ->
diff --git a/apps/emqx_exproto/test/emqx_exproto_SUITE.erl b/apps/emqx_exproto/test/emqx_exproto_SUITE.erl
index f1fdfa9f8..70484c30e 100644
--- a/apps/emqx_exproto/test/emqx_exproto_SUITE.erl
+++ b/apps/emqx_exproto/test/emqx_exproto_SUITE.erl
@@ -55,7 +55,7 @@ metrics() ->
 init_per_group(GrpName, Cfg) ->
     put(grpname, GrpName),
     Svrs = emqx_exproto_echo_svr:start(),
-    emqx_ct_helpers:start_apps([emqx_exproto], fun set_sepecial_cfg/1),
+    emqx_ct_helpers:start_apps([emqx_exproto], fun set_special_cfg/1),
     emqx_logger:set_log_level(debug),
     [{servers, Svrs}, {listener_type, GrpName} | Cfg].
 
@@ -63,7 +63,7 @@ end_per_group(_, Cfg) ->
     emqx_ct_helpers:stop_apps([emqx_exproto]),
     emqx_exproto_echo_svr:stop(proplists:get_value(servers, Cfg)).
 
-set_sepecial_cfg(emqx_exproto) ->
+set_special_cfg(emqx_exproto) ->
     LisType = get(grpname),
     Listeners = application:get_env(emqx_exproto, listeners, []),
     SockOpts = socketopts(LisType),
@@ -77,7 +77,7 @@ set_sepecial_cfg(emqx_exproto) ->
     NListeners = [{Proto, LisType, LisOn, UpgradeOpts(Opts)}
                   || {Proto, _Type, LisOn, Opts} <- Listeners],
     application:set_env(emqx_exproto, listeners, NListeners);
-set_sepecial_cfg(emqx) ->
+set_special_cfg(emqx) ->
     application:set_env(emqx, allow_anonymous, true),
     application:set_env(emqx, enable_acl_cache, false),
     ok.
diff --git a/lib-ce/emqx_modules/test/emqx_modules_SUITE.erl b/lib-ce/emqx_modules/test/emqx_modules_SUITE.erl
index 48bd0bd5b..dc76e8eb7 100644
--- a/lib-ce/emqx_modules/test/emqx_modules_SUITE.erl
+++ b/lib-ce/emqx_modules/test/emqx_modules_SUITE.erl
@@ -32,11 +32,11 @@
 all() -> emqx_ct:all(?MODULE).
 
 init_per_suite(Config) ->
-    emqx_ct_helpers:start_apps([emqx_management, emqx_modules], fun set_sepecial_cfg/1),
+    emqx_ct_helpers:start_apps([emqx_management, emqx_modules], fun set_special_cfg/1),
     emqx_ct_http:create_default_app(),
     Config.
 
-set_sepecial_cfg(_) ->
+set_special_cfg(_) ->
     application:set_env(emqx, modules_loaded_file, emqx_ct_helpers:deps_path(emqx, "test/emqx_SUITE_data/loaded_modules")),
     ok.
 
diff --git a/test/emqx_plugins_SUITE.erl b/test/emqx_plugins_SUITE.erl
index f62fea5e7..6d8847f43 100644
--- a/test/emqx_plugins_SUITE.erl
+++ b/test/emqx_plugins_SUITE.erl
@@ -37,11 +37,11 @@ init_per_suite(Config) ->
 
     put(loaded_file, filename:join([DataPath, "loaded_plugins"])),
     emqx_ct_helpers:boot_modules([]),
-    emqx_ct_helpers:start_apps([], fun(_) -> set_sepecial_cfg(DataPath) end),
+    emqx_ct_helpers:start_apps([], fun(_) -> set_special_cfg(DataPath) end),
 
     Config.
 
-set_sepecial_cfg(PluginsDir) ->
+set_special_cfg(PluginsDir) ->
     application:set_env(emqx, plugins_loaded_file, get(loaded_file)),
     application:set_env(emqx, expand_plugins_dir, PluginsDir),
     ok.