diff --git a/test/config/training_service.yml b/test/config/training_service.yml
index 65f2676960..c9c80001d7 100644
--- a/test/config/training_service.yml
+++ b/test/config/training_service.yml
@@ -78,6 +78,8 @@ paiYarn:
 pai:
   nniManagerIp:
   maxExecDuration: 15m
+  maxTrialNum: 1
+  trialConcurrency: 1
   paiConfig:
     host:
     userName: