diff --git a/contrib/grab-headless_shell.sh b/contrib/grab-headless_shell.sh
index 5eb2bc2..a7ca45d 100755
--- a/contrib/grab-headless_shell.sh
+++ b/contrib/grab-headless_shell.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -ex
 
 OUT=${1:-headless_shell}
 VER=$2
@@ -15,4 +15,12 @@ pushd $OUT &> /dev/null
 
 curl -s https://storage.googleapis.com/docker-chrome-headless/headless_shell-$VER.tar.bz2 | tar -jxv
 
+./headless_shell --remote-debugging-port=8222 &
+
+sleep 1
+
+curl -v -q http://localhost:8222/json/version
+
+killall -9 headless_shell
+
 popd &> /dev/null