diff --git a/roles/xmpp_server/molecule/default/prepare.yml b/roles/xmpp_server/molecule/default/prepare.yml
index 3c589d551c745240b03738ba3c3525366b53447b..becb853f2c2ada341780491839fb785e492a6ab6 100644
--- a/roles/xmpp_server/molecule/default/prepare.yml
+++ b/roles/xmpp_server/molecule/default/prepare.yml
@@ -18,6 +18,11 @@
         update_cache: true
       changed_when: false
 
+    - name: Install tools for testing
+      apt:
+        name: gnutls-bin
+        state: present
+
 - hosts: stretch
   become: true
   tasks: