diff --git a/test/security/k8s/vagrant/dublin/Vagrantfile b/test/security/k8s/vagrant/dublin/Vagrantfile
index dc55809..abef9f8 100644
--- a/test/security/k8s/vagrant/dublin/Vagrantfile
+++ b/test/security/k8s/vagrant/dublin/Vagrantfile
@@ -41,10 +41,12 @@
 
       if machine[:name] == 'control'
         config.vm.provision :shell, path: "../../tools/dublin/imported/openstack-k8s-controlnode.sh"
+        config.vm.provision :shell, inline: "usermod -aG docker vagrant" # script above adds "ubuntu" user only
       end
 
       if machine[:name] == 'worker'
         config.vm.provision :shell, path: "../../tools/dublin/imported/openstack-k8s-workernode.sh"
+        config.vm.provision :shell, inline: "usermod -aG docker vagrant" # script above adds "ubuntu" user only
       end
 
       if machine[:name] == 'operator'