diff --git a/Jenkinsfile b/Jenkinsfile
index 2ea7657590..195cf6526e 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -43,7 +43,9 @@ def pre_test(){
     git checkout develop
     git pull
     git fetch
+    git branch -d ${CHANGE_BRANCH}
     git checkout ${CHANGE_BRANCH}
+    git pull
     git merge develop
     cd ${WK}
     git reset --hard