diff --git a/apps/emqx/test/emqx_alarm_SUITE.erl b/apps/emqx/test/emqx_alarm_SUITE.erl
index 605300d2f..453061f9f 100644
--- a/apps/emqx/test/emqx_alarm_SUITE.erl
+++ b/apps/emqx/test/emqx_alarm_SUITE.erl
@@ -90,7 +90,7 @@ t_validity_period(_) ->
     ok = emqx_alarm:activate(a),
     ok = emqx_alarm:deactivate(a),
     ?assertNotEqual({error, not_found}, get_alarm(a, emqx_alarm:get_alarms(deactivated))),
-    ct:sleep(2000),
+    ct:sleep(3000),
     ?assertEqual({error, not_found}, get_alarm(a, emqx_alarm:get_alarms(deactivated))).
 
 get_alarm(Name, [Alarm = #{name := Name} | _More]) ->