diff --git a/nodepool/scripts/prepare_devstack.sh b/nodepool/scripts/prepare_devstack.sh
index 92327817ea..16e05bb682 100755
--- a/nodepool/scripts/prepare_devstack.sh
+++ b/nodepool/scripts/prepare_devstack.sh
@@ -20,6 +20,3 @@ cd /opt/nodepool-scripts/
 ./install_devstack_dependencies.sh
 DISTRIB_CODENAME=$(lsb_release -sc)
 python ./cache_devstack.py $DISTRIB_CODENAME
-
-sync
-sleep 5
diff --git a/nodepool/scripts/prepare_node.sh b/nodepool/scripts/prepare_node.sh
index 46892a2245..edaa0333f4 100755
--- a/nodepool/scripts/prepare_node.sh
+++ b/nodepool/scripts/prepare_node.sh
@@ -251,6 +251,3 @@ sudo -H /usr/zuul-swift-logs-env/bin/pip install python-magic argparse \
 # https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/839588
 sudo -H virtualenv /usr/os-testr-env
 sudo -H /usr/os-testr-env/bin/pip install os-testr
-
-sync
-sleep 5
diff --git a/nodepool/scripts/prepare_node_tripleo.sh b/nodepool/scripts/prepare_node_tripleo.sh
index b5315b4cde..075e047b07 100755
--- a/nodepool/scripts/prepare_node_tripleo.sh
+++ b/nodepool/scripts/prepare_node_tripleo.sh
@@ -25,6 +25,3 @@ export THIN='true'
 sudo ip link set mtu 1458 dev eth0
 ./prepare_node.sh "$HOSTNAME"
 sudo -u jenkins -i /opt/nodepool-scripts/prepare_tripleo.sh "$HOSTNAME"
-
-sync
-sleep 5
diff --git a/nodepool/scripts/prepare_tripleo.sh b/nodepool/scripts/prepare_tripleo.sh
index f923e7afeb..214456dfea 100755
--- a/nodepool/scripts/prepare_tripleo.sh
+++ b/nodepool/scripts/prepare_tripleo.sh
@@ -60,6 +60,3 @@ else
     echo "Unsupported distro."
     exit 1
 fi
-
-sync
-sleep 5
diff --git a/nodepool/scripts/restrict_memory.sh b/nodepool/scripts/restrict_memory.sh
index a22355398d..74da9d923d 100755
--- a/nodepool/scripts/restrict_memory.sh
+++ b/nodepool/scripts/restrict_memory.sh
@@ -29,6 +29,3 @@ if [ -f /etc/default/grub ] ; then
 elif [ -f /boot/grub/grub.conf ] ; then
     sudo sed -i -e 's/^timeout=[0-9]\+/timeout=0/' -e 's/\(^\s\+kernel.*\)/\1 mem=8G/' /boot/grub/grub.conf
 fi
-
-sync
-sleep 5