diff --git a/dev/heat/kollanode.yaml b/dev/heat/kollanode.yaml
index b2dab39215..04c958f731 100644
--- a/dev/heat/kollanode.yaml
+++ b/dev/heat/kollanode.yaml
@@ -184,10 +184,10 @@ resources:
             systemctl start ntpd
 
             # Install mariadb-client
-            yum install -y mariadb
+            yum -y install mariadb
 
             # Install OpenStack Clients
-            yum install -y python-keystoneclient python-glanceclient \
+            yum -y install python-keystoneclient python-glanceclient \
                            python-novaclient python-cinderclient \
                            python-neutronclient python-heatclient
 
diff --git a/dev/vagrant/bootstrap.sh b/dev/vagrant/bootstrap.sh
index e7a50e09d9..ace58ecba1 100644
--- a/dev/vagrant/bootstrap.sh
+++ b/dev/vagrant/bootstrap.sh
@@ -32,7 +32,7 @@ function _ensure_lsb_release {
     if [[ -x $(which apt-get 2>/dev/null) ]]; then
         sudo apt-get install -y lsb-release
     elif [[ -x $(which yum 2>/dev/null) ]]; then
-        sudo yum install -y redhat-lsb-core
+        sudo yum -y install redhat-lsb-core
     fi
 }
 
@@ -65,9 +65,9 @@ function prep_work {
     sed -i -r "s/^(127\.0\.0\.1\s+)(.*) `hostname` (.+)/\1 \3/" /etc/hosts
 
     if is_centos; then
-        yum install -y epel-release
+        yum -y install epel-release
         rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
-        yum install -y MySQL-python vim-enhanced python-pip python-devel gcc openssl-devel libffi-devel libxml2-devel libxslt-devel
+        yum -y install MySQL-python vim-enhanced python-pip python-devel gcc openssl-devel libffi-devel libxml2-devel libxslt-devel
     elif is_ubuntu; then
         apt-get update
         apt-get install -y python-mysqldb python-pip python-dev build-essential libssl-dev libffi-dev libxml2-dev libxslt-dev
@@ -105,7 +105,7 @@ EOF
         # Also upgrade device-mapper here because of:
         # https://github.com/docker/docker/issues/12108
         # Upgrade lvm2 to get device-mapper installed
-        yum install -y docker-engine lvm2 device-mapper
+        yum -y install docker-engine lvm2 device-mapper
 
         # Despite it shipping with /etc/sysconfig/docker, Docker is not configured to
         # load it from it's service file.
@@ -144,7 +144,7 @@ function configure_kolla {
 # Configure the operator node and install some additional packages.
 function configure_operator {
     if is_centos; then
-        yum install -y git mariadb
+        yum -y install git mariadb
     elif is_ubuntu; then
         apt-get install -y git mariadb-client selinux-utils
     else
diff --git a/doc/quickstart.rst b/doc/quickstart.rst
index bd799c8e20..e236afe0a9 100644
--- a/doc/quickstart.rst
+++ b/doc/quickstart.rst
@@ -156,7 +156,7 @@ following requirements are needed to build the client code:
    apt-get install -y python-dev libffi-dev libssl-dev gcc git
 
    # CentOS 7
-   yum install -y python-devel libffi-devel openssl-devel gcc git
+   yum -y install python-devel libffi-devel openssl-devel gcc git
 
 To install these clients use:
 
diff --git a/tools/setup_RedHat.sh b/tools/setup_RedHat.sh
index cdc8254a6e..ce5a93838c 100755
--- a/tools/setup_RedHat.sh
+++ b/tools/setup_RedHat.sh
@@ -40,7 +40,7 @@ gpgcheck=1
 gpgkey=https://yum.dockerproject.org/gpg
 EOF
 
-sudo yum install -y libffi-devel openssl-devel docker-engine btrfs-progs
+sudo yum -y install libffi-devel openssl-devel docker-engine btrfs-progs
 
 setup_disk