diff --git a/TestDrive.md b/TestDrive.md
index 0e4fd0b99d16335adcc15b2e17ba20c229a29df4..fc9aec17a8a650e8b9e98151f8f10cd03db41dd5 100644
--- a/TestDrive.md
+++ b/TestDrive.md
@@ -18,6 +18,7 @@ This one-shot script clones the code, initialises Docker swarm mode and then dep
 # docker swarm init --advertise-addr eth0 && \
   git clone https://github.com/alexellis/faas && \
   cd faas && \
+  git checkout 0.5.6b-alpha && \
   ./deploy_stack.sh && \
   docker service ls
 ```