diff --git a/apps/iot/src/mysql_client.erl b/apps/iot/src/mysql_client.erl
index 8e7770e..8c111e8 100644
--- a/apps/iot/src/mysql_client.erl
+++ b/apps/iot/src/mysql_client.erl
@@ -14,24 +14,6 @@
 %% API
 -export([get_row/1, get_row/2, get_all/1, get_all/2]).
 -export([update/3, update_by/1, update_by/2, insert/3]).
--export([test/0]).
-
-test() ->
-
-    Result = get_row(<<"select * from Carport limit 10">>),
-    lager:info("[mysql_client] the result is: ~p", [Result]),
-
-    Result1 = get_all(<<"select * from Carport limit 10">>),
-    lager:info("[mysql_client] the result is: ~p", [Result1]),
-
-    InsertResult = insert(<<"CarInfo">>, [{<<"owner_name">>, <<"anlicheng">>}], false),
-    lager:info("[mysql_client] the insert id is: ~p", [InsertResult]),
-
-    UpdateResult = update_by(<<"update CarInfo set owner_name = AiYaLing123 where car_id = ? limit 1">>, [1]),
-
-    lager:info("[mysql_client] the update result is: ~p", [UpdateResult]),
-
-    ok.
 
 %% 从数据库中查找一行记录
 -spec get_row(Sql::binary()) -> {ok, Record::map()} | undefined.