diff --git a/ci/jenkins/Jenkinsfile b/ci/jenkins/Jenkinsfile
index 3307a237fa91dbe36308da910a60793f20e0a4e0..7163c207ed250cf967b0af13c633a13ce64865a4 100644
--- a/ci/jenkins/Jenkinsfile
+++ b/ci/jenkins/Jenkinsfile
@@ -30,6 +30,7 @@ pipeline {
         LOWER_BUILD_TYPE = params.BUILD_TYPE.toLowerCase()
         SEMVER = "${BRANCH_NAME.contains('/') ? BRANCH_NAME.substring(BRANCH_NAME.lastIndexOf('/') + 1) : BRANCH_NAME}"
         PIPELINE_NAME = "milvus-ci"
+        HELM_BRANCH = "master"
     }
 
     stages {
diff --git a/ci/jenkins/step/singleDevNightlyTest.groovy b/ci/jenkins/step/singleDevNightlyTest.groovy
index 1866e1dee2c084a2190fe7be65c6b875411d0128..ee0200da0b1a45949669345a2e6dcfaa5ea5ec16 100644
--- a/ci/jenkins/step/singleDevNightlyTest.groovy
+++ b/ci/jenkins/step/singleDevNightlyTest.groovy
@@ -3,7 +3,7 @@ timeout(time: 180, unit: 'MINUTES') {
         sh 'helm version'
         sh 'helm repo add stable https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts'
         sh 'helm repo update'
-        checkout([$class: 'GitSCM', branches: [[name: "master"]], userRemoteConfigs: [[url: "https://github.com/milvus-io/milvus-helm.git", name: 'origin', refspec: "+refs/heads/master:refs/remotes/origin/master"]]])
+        checkout([$class: 'GitSCM', branches: [[name: "${env.HELM_BRANCH}"]], userRemoteConfigs: [[url: "https://github.com/milvus-io/milvus-helm.git", name: 'origin', refspec: "+refs/heads/${env.HELM_BRANCH}:refs/remotes/origin/${env.HELM_BRANCH}"]]])
         retry(3) {
             sh "helm install --wait --timeout 300s --set image.repository=registry.zilliz.com/milvus/engine --set image.tag=${DOCKER_VERSION} --set image.pullPolicy=Always --set service.type=ClusterIP -f ci/db_backend/mysql_${BINARY_VERSION}_values.yaml -f ci/filebeat/values.yaml --namespace milvus ${env.HELM_RELEASE_NAME} ."
         }
@@ -19,7 +19,7 @@ timeout(time: 180, unit: 'MINUTES') {
     
     if (!fileExists('milvus-helm')) {
         dir ("milvus-helm") {
-            checkout([$class: 'GitSCM', branches: [[name: "master"]], userRemoteConfigs: [[url: "https://github.com/milvus-io/milvus-helm.git", name: 'origin', refspec: "+refs/heads/master:refs/remotes/origin/master"]]])
+            checkout([$class: 'GitSCM', branches: [[name:"${env.HELM_BRANCH}"]], userRemoteConfigs: [[url: "https://github.com/milvus-io/milvus-helm.git", name: 'origin', refspec: "+refs/heads/${env.HELM_BRANCH}:refs/remotes/origin/${env.HELM_BRANCH}"]]])
         }
     }
     dir ("milvus-helm") {
diff --git a/ci/jenkins/step/singleDevTest.groovy b/ci/jenkins/step/singleDevTest.groovy
index c3a2371570458660d62caea743cc668a65ca2593..2139089458fbbedb2cf8589b74d35d761d193d8f 100644
--- a/ci/jenkins/step/singleDevTest.groovy
+++ b/ci/jenkins/step/singleDevTest.groovy
@@ -3,7 +3,7 @@ timeout(time: 120, unit: 'MINUTES') {
         sh 'helm version'
         sh 'helm repo add stable https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts'
         sh 'helm repo update'
-        checkout([$class: 'GitSCM', branches: [[name: "master"]], userRemoteConfigs: [[url: "https://github.com/milvus-io/milvus-helm.git", name: 'origin', refspec: "+refs/heads/master:refs/remotes/origin/master"]]])
+        checkout([$class: 'GitSCM', branches: [[name: "${env.HELM_BRANCH}"]], userRemoteConfigs: [[url: "https://github.com/milvus-io/milvus-helm.git", name: 'origin', refspec: "+refs/heads/${env.HELM_BRANCH}:refs/remotes/origin/${env.HELM_BRANCH}"]]])
         retry(3) {
             sh "helm install --wait --timeout 600s --set image.repository=registry.zilliz.com/milvus/engine --set image.tag=${DOCKER_VERSION} --set image.pullPolicy=Always --set service.type=ClusterIP -f ci/db_backend/mysql_${BINARY_VERSION}_values.yaml -f ci/filebeat/values.yaml --namespace milvus ${env.HELM_RELEASE_NAME} ."
         }