diff --git a/apps/emqx/test/emqx_common_test_helpers.erl b/apps/emqx/test/emqx_common_test_helpers.erl
index cda953a76..2169f42ba 100644
--- a/apps/emqx/test/emqx_common_test_helpers.erl
+++ b/apps/emqx/test/emqx_common_test_helpers.erl
@@ -488,8 +488,9 @@ is_tcp_server_available(Host, Port, Timeout) ->
 start_ekka() ->
     try mnesia_hook:module_info() of
         _ -> ekka:start()
-    catch _:_ ->
-        %% Falling back to using Mnesia DB backend.
-        application:set_env(mria, db_backend, mnesia),
-        ekka:start()
+    catch
+        _:_ ->
+            %% Falling back to using Mnesia DB backend.
+            application:set_env(mria, db_backend, mnesia),
+            ekka:start()
     end.
diff --git a/apps/emqx/test/emqx_config_handler_SUITE.erl b/apps/emqx/test/emqx_config_handler_SUITE.erl
index 72e3ed62f..ae34bee7a 100644
--- a/apps/emqx/test/emqx_config_handler_SUITE.erl
+++ b/apps/emqx/test/emqx_config_handler_SUITE.erl
@@ -223,7 +223,9 @@ t_callback_crash(_Config) ->
     Opts = #{rawconf_with_defaults => true},
     ok = emqx_config_handler:add_handler(CrashPath, ?MODULE),
     Old = emqx:get_raw_config(CrashPath),
-    ?assertMatch({error, {config_update_crashed, _}}, emqx:update_config(CrashPath, <<"89%">>, Opts)),
+    ?assertMatch(
+        {error, {config_update_crashed, _}}, emqx:update_config(CrashPath, <<"89%">>, Opts)
+    ),
     New = emqx:get_raw_config(CrashPath),
     ?assertEqual(Old, New),
     ok = emqx_config_handler:remove_handler(CrashPath),