diff --git a/devstack-vm-gate.sh b/devstack-vm-gate.sh
index df0d060e..8f23c8ac 100755
--- a/devstack-vm-gate.sh
+++ b/devstack-vm-gate.sh
@@ -268,7 +268,7 @@ else
     sudo chown -R stack:stack $BASE
 
     echo "Running devstack"
-    sudo -H -u stack ./stack.sh
+    sudo -H -u stack stdbuf -oL -eL ./stack.sh
 
     # provide a check that the right db was running
     # the path are different for fedora and red hat.