diff --git a/test/check-gradient.sikuli/check-gradient.py b/test/check-gradient.sikuli/check-gradient.py
index 846f531..dca7f63 100644
--- a/test/check-gradient.sikuli/check-gradient.py
+++ b/test/check-gradient.sikuli/check-gradient.py
@@ -1 +1 @@
-wait("1529963334209.png")
+wait("1529963334209.png", 10)
diff --git a/test/virtualbox.sh b/test/virtualbox.sh
index c4d808f..f7d87f7 100755
--- a/test/virtualbox.sh
+++ b/test/virtualbox.sh
@@ -1,4 +1,27 @@
 #!/bin/sh
 set -e
 
-VBoxManage --help
\ No newline at end of file
+os_file="example-os/os.sh"
+img_file="$(tempfile --suffix=".img")"
+vbox_dir="vbox_$(date +%s)-$$"
+vmname="automatic-os-test-$(date +%s)-$$"
+
+ln -sf "$(readlink -f "$os_file")" "$img_file"
+VBoxManage createvm --name "$vmname" --register --basefolder "/tmp/$vbox_dir"
+VBoxManage storagectl "$vmname" --name 'floppy disk drive' --add floppy --bootable on
+VBoxManage storageattach "$vmname" --storagectl 'floppy disk drive' --port 0 --device 0 --type fdd --medium "$img_file"
+VBoxManage modifyvm "$vmname" --boot1 floppy
+VBoxManage startvm "$vmname" --type gui &
+pid=$!
+runsikulix -r test/check-gradient.sikuli
+VBoxManage controlvm "$vmname" poweroff
+wait $pid
+# TODO: should ensure that the cleanup phase is always done even if the test fails.
+for i in `seq 10`; do
+    if VBoxManage unregistervm "$vmname" --delete; then
+        break
+    fi
+    sleep 0.1
+done
+rm "$img_file"
+rm "/tmp/$vbox_dir" -fr