diff --git a/ci/jenkinsfile/dev_test.groovy b/ci/jenkinsfile/dev_test.groovy
index 8060d599af13f7b839ffd4f35064332bd22a9890..8d7a1b05d60ac204d40d2fafc6d5cad9636d96c4 100644
--- a/ci/jenkinsfile/dev_test.groovy
+++ b/ci/jenkinsfile/dev_test.groovy
@@ -8,6 +8,9 @@ timeout(time: 20, unit: 'MINUTES') {
 
         // mysql database backend test
         load "${env.WORKSPACE}/ci/jenkinsfile/cleanup_dev.groovy"
+
+        sleep 30
+
         if (!fileExists('milvus-helm')) {
             dir ("milvus-helm") {
                 checkout([$class: 'GitSCM', branches: [[name: "${SEMVER}"]], doGenerateSubmoduleConfigurations: false, extensions: [], submoduleCfg: [], userRemoteConfigs: [[credentialsId: "${params.GIT_USER}", url: "git@192.168.1.105:megasearch/milvus-helm.git", name: 'origin', refspec: "+refs/heads/${SEMVER}:refs/remotes/origin/${SEMVER}"]]])