diff --git a/scripts/bootstrap-aio.sh b/scripts/bootstrap-aio.sh
index 748cbd766a..e1042dbd47 100755
--- a/scripts/bootstrap-aio.sh
+++ b/scripts/bootstrap-aio.sh
@@ -34,6 +34,7 @@ export TEMPEST_FLAT_CIDR=${TEMPEST_FLAT_CIDR:-"172.29.248.0/22"}
 export FLUSH_IPTABLES=${FLUSH_IPTABLES:-"yes"}
 export RABBITMQ_PACKAGE_URL=${RABBITMQ_PACKAGE_URL:-""}
 export MONGO_HOST=${MONGO_HOST:-"172.29.236.100"}
+export DEBIAN_FRONTEND=${DEBIAN_FRONTEND:-"noninteractive"}
 
 # Default disabled fatal deprecation warnings
 export CINDER_FATAL_DEPRECATIONS=${CINDER_FATAL_DEPRECATIONS:-"no"}
diff --git a/scripts/bootstrap-ansible.sh b/scripts/bootstrap-ansible.sh
index e9935d2e5a..a62e2abc25 100755
--- a/scripts/bootstrap-ansible.sh
+++ b/scripts/bootstrap-ansible.sh
@@ -27,6 +27,7 @@ export ANSIBLE_WORKING_DIR=${ANSIBLE_WORKING_DIR:-/opt/ansible_${ANSIBLE_GIT_REL
 export GET_PIP_URL=${GET_PIP_URL:-"https://bootstrap.pypa.io/get-pip.py"}
 export SSH_DIR=${SSH_DIR:-"/root/.ssh"}
 export UPDATE_ANSIBLE_REQUIREMENTS=${UPDATE_ANSIBLE_REQUIREMENTS:-"yes"}
+export DEBIAN_FRONTEND=${DEBIAN_FRONTEND:-"noninteractive"}
 
 
 ## Functions -----------------------------------------------------------------