diff --git a/prepare-vms/README.md b/prepare-vms/README.md
index daa1f80a..a8540860 100644
--- a/prepare-vms/README.md
+++ b/prepare-vms/README.md
@@ -57,6 +57,7 @@ workshopctl - the orchestration workshop swiss army knife
 Commands:
 ami          Show the AMI that will be used for deployment
 amis         List Ubuntu AMIs in the current region
+build        Build the Docker image to run this program in a container
 cards        Generate ready-to-print cards for a batch of VMs
 deploy       Install Docker on a bunch of running VMs
 ec2quotas    Check our EC2 quotas (max instances)
@@ -64,6 +65,7 @@ help         Show available commands
 ids          List the instance IDs belonging to a given tag or token
 ips          List the IP addresses of the VMs for a given tag or token
 kube         Setup kubernetes clusters with kubeadm (must be run AFTER deploy)
+kubetest     Check that all notes are reporting as Ready
 list         List available batches in the current region
 opensg       Open the default security group to ALL ingress traffic
 pull_images  Pre-pull a bunch of Docker images
@@ -72,6 +74,7 @@ start        Start a batch of VMs
 status       List instance status for a given batch
 stop         Stop (terminate, shutdown, kill, remove, destroy...) instances
 test         Run tests (pre-flight checks) on a batch of VMs
+wrap         Run this program in a container
 ```
 
 ### Summary of What `./workshopctl` Does For You
@@ -128,6 +131,13 @@ az group deployment create --resource-group workshop --template-file azuredeploy
 az vm list-ip-addresses --resource-group workshop --output table
 ```
 
+After the workshop is over, remove the instances:
+
+```
+az group delete --resource-group workshop
+```
+
+
 ## Other Tools
 
 ### Deploying your SSH key to all the machines
diff --git a/prepare-vms/lib/commands.sh b/prepare-vms/lib/commands.sh
index f9cc6671..7b33e5fc 100644
--- a/prepare-vms/lib/commands.sh
+++ b/prepare-vms/lib/commands.sh
@@ -175,10 +175,10 @@ _cmd kubetest "Check that all notes are reporting as Ready"
 _cmd_kubetest() {
     # There are way too many backslashes in the command below.
     # Feel free to make that better ♥
-    pssh -i "
+    pssh "
     set -e
     if grep -q node1 /tmp/node; then
-      for NODE in \$(awk /\ node/\ {print\ \\\$2} /etc/hosts); do 
+      for NODE in \$(awk /\ node/\ {print\ \\\$2} /etc/hosts); do
         echo \$NODE ; kubectl get nodes | grep -w \$NODE | grep -w Ready
       done
     fi"
@@ -434,6 +434,7 @@ tag_is_reachable() {
 }
 
 test_tag() {
+    TAG=$1
     ips_file=tags/$TAG/ips.txt
     info "Picking a random IP address in $ips_file to run tests."
     n=$((1 + $RANDOM % $(wc -l <$ips_file)))