diff --git a/roles/wsgi_website/molecule/default/prepare.yml b/roles/wsgi_website/molecule/default/prepare.yml
index 6792777f1ddb6f7ff8399383dd318c0a25ae41a5..bed5c4baf2b6830ae2dd982b8726cd0d30ed84c3 100644
--- a/roles/wsgi_website/molecule/default/prepare.yml
+++ b/roles/wsgi_website/molecule/default/prepare.yml
@@ -2,21 +2,21 @@
 
 - name: Prepare
   hosts: all
-  gather_facts: False
+  gather_facts: false
   tasks:
     - name: Install python for Ansible
       raw: test -e /usr/bin/python || (apt -y update && apt install -y python-minimal)
-      become: True
-      changed_when: False
+      become: true
+      changed_when: false
 
 - hosts: wsgi-website
-  become: yes
+  become: true
   tasks:
 
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
-        update_cache: yes
-      changed_when: False
+        update_cache: true
+      changed_when: false
 
     - name: Set-up /etc/hosts entries
       lineinfile:
@@ -26,17 +26,17 @@
     - name: Install curl for testing redirects and webpage content
       apt:
         name: curl
-        state: installed
+        state: present
 
     - name: Install swaks for testing mail forwarding
       apt:
         name: swaks
-        state: installed
+        state: present
 
     - name: Install Postfix for testing mail forwarding (Exim4 not covered)
       apt:
         name: postfix
-        state: installed
+        state: present
 
     - name: Set-up group for an additional user
       group:
@@ -48,3 +48,6 @@
         name: user
         group: user
         shell: /bin/bash
+
+    - name: Rename the ss utility (see https://github.com/philpep/testinfra/pull/320)
+      command: "mv /bin/ss /bin/ss.bak"