diff --git a/tests/Dockerfile.centos-6 b/tests/Dockerfile.centos-6
index e6b4f44..bad0cc6 100644
--- a/tests/Dockerfile.centos-6
+++ b/tests/Dockerfile.centos-6
@@ -6,3 +6,5 @@ RUN yum install -y ansible
 
 # Install Ansible inventory file
 RUN echo -e '[local]\nlocalhost ansible_connection=local' > /etc/ansible/hosts
+
+CMD ["/sbin/init"]