diff --git a/roles/backup/molecule/default/prepare.yml b/roles/backup/molecule/default/prepare.yml
index fddd69fd2ab07db6f95b7553fa4c7a0431ebd22c..eefd77c3d02929d5fe3bed6cc81072fdb26e7060 100644
--- a/roles/backup/molecule/default/prepare.yml
+++ b/roles/backup/molecule/default/prepare.yml
@@ -2,17 +2,14 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
diff --git a/roles/backup_client/molecule/default/prepare.yml b/roles/backup_client/molecule/default/prepare.yml
index 4976ea4c11f8a03203e5789d970ef439193d1256..b9c64c0164bc2770650c363c7a852a97b48f6b1d 100644
--- a/roles/backup_client/molecule/default/prepare.yml
+++ b/roles/backup_client/molecule/default/prepare.yml
@@ -2,23 +2,21 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
       changed_when: false
 
-- hosts: backup-server
+- name: Prepare, helpers
+  hosts: backup-server
   become: true
   tasks:
 
diff --git a/roles/backup_server/molecule/default/prepare.yml b/roles/backup_server/molecule/default/prepare.yml
index 85d51d2ea5b4f1aac00053e50d0a4a2dfb2bfb8b..d5df27dc533f1e55e4f81dfdc20b703950416bd9 100644
--- a/roles/backup_server/molecule/default/prepare.yml
+++ b/roles/backup_server/molecule/default/prepare.yml
@@ -1,11 +1,7 @@
 ---
 
-- name: Prepare
-  hosts: all
-  gather_facts: false
-  tasks:
-
-- hosts: localhost
+- name: Prepare, test fixtures
+  hosts: localhost
   connection: local
   tasks:
 
@@ -17,13 +13,14 @@
         - tests/data/ssh/client1
         - tests/data/ssh/client2
 
-- hosts: all
+- name: Prepare
+  hosts: all
   become: true
+  gather_facts: false
   tasks:
 
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
     - name: Update all caches to avoid errors due to missing remote archives
diff --git a/roles/bootstrap/molecule/default/prepare.yml b/roles/bootstrap/molecule/default/prepare.yml
index f03d4f5d4175634a32df11c26577179983e34278..7f1c268a76b571a1cedb0cf1578a7267ac17c11e 100644
--- a/roles/bootstrap/molecule/default/prepare.yml
+++ b/roles/bootstrap/molecule/default/prepare.yml
@@ -2,15 +2,22 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
+      changed_when: false
+
+    - name: Update all caches to avoid errors due to missing remote archives
+      apt:
+        update_cache: true
       changed_when: false
 
 # Put Ansible key into root's authorized_keys to test its removal.
-- hosts: parameters-mandatory
+- name: Prepare, text fixtures
+  hosts: parameters-mandatory
   become: true
   tasks:
 
@@ -20,7 +27,8 @@
         key: "{{ lookup('file', '~/.ssh/id_rsa.pub') }}"
 
 # Put Ansible key into root's authorized_keys to test its removal.
-- hosts: parameters-optional
+- name: Prepare, text fixtures
+  hosts: parameters-optional
   become: true
   tasks:
 
diff --git a/roles/common/molecule/default/prepare.yml b/roles/common/molecule/default/prepare.yml
index c205858aedc3818f36d4ff1752b6c1826cf659d1..89d70e19002bf8f9524d57712ff0258eee9ad6ed 100644
--- a/roles/common/molecule/default/prepare.yml
+++ b/roles/common/molecule/default/prepare.yml
@@ -1,6 +1,6 @@
 ---
 
-- name: Set-up fixtures
+- name: Prepare, test fixtures
   hosts: localhost
   connection: local
   gather_facts: false
@@ -20,18 +20,14 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
 
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
@@ -42,7 +38,13 @@
         name: net-tools
         state: present
 
-- hosts: helper
+    - name: Remove the ss utility (see https://github.com/philpep/testinfra/pull/320)
+      file:
+        path: "/bin/ss"
+        state: absent
+
+- name: Prepare, helpers
+  hosts: helper
   become: true
   tasks:
 
@@ -51,7 +53,8 @@
         name: apt-cacher-ng
         state: present
 
-- hosts: client
+- name: Prepare, helpers
+  hosts: client
   become: true
   tasks:
 
@@ -75,7 +78,8 @@
         fd00::192:168:56:21: parameters-mandatory-bookworm
         fd00::192:168:56:22: parameters-optional-bookworm
 
-- hosts: parameters-mandatory,parameters-optional
+- name: Prepare, test fixtures
+  hosts: parameters-mandatory,parameters-optional
   become: true
   tasks:
 
@@ -156,12 +160,3 @@
           - ntp
           - ntpdate
         state: present
-
-- hosts: parameters-mandatory,parameters-optional
-  become: true
-  tasks:
-
-    - name: Remove the ss utility (see https://github.com/philpep/testinfra/pull/320)
-      file:
-        path: "/bin/ss"
-        state: absent
diff --git a/roles/database/molecule/default/prepare.yml b/roles/database/molecule/default/prepare.yml
index b4d51db5d50ce0fd8a491efb1e31659a15585e02..b89a35b8ff052860e49c4e0d1048cdaae3d271bd 100644
--- a/roles/database/molecule/default/prepare.yml
+++ b/roles/database/molecule/default/prepare.yml
@@ -2,23 +2,21 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
       changed_when: false
 
-- hosts: backup-server
+- name: Prepare, helpers
+  hosts: backup-server
   become: true
   roles:
     - role: backup_server
diff --git a/roles/database_server/molecule/default/prepare.yml b/roles/database_server/molecule/default/prepare.yml
index fddd69fd2ab07db6f95b7553fa4c7a0431ebd22c..eefd77c3d02929d5fe3bed6cc81072fdb26e7060 100644
--- a/roles/database_server/molecule/default/prepare.yml
+++ b/roles/database_server/molecule/default/prepare.yml
@@ -2,17 +2,14 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
diff --git a/roles/ldap_client/handlers/main.yml b/roles/ldap_client/handlers/main.yml
index 95f29b7a2a9f22adce44f88731d56b24b1723de4..8dae2fd6fcd7ea5173f2e61f1ea32b955134ba09 100644
--- a/roles/ldap_client/handlers/main.yml
+++ b/roles/ldap_client/handlers/main.yml
@@ -1,4 +1,5 @@
 ---
 
-- debug:
-    msg: "No handlers are available for ldap_client role."
+- name: Dummy handler to suppress Ansible warnings
+  debug:
+    msg: "This is just a dummy task to suppress the Ansible warning about an empty include."
diff --git a/roles/ldap_client/molecule/default/prepare.yml b/roles/ldap_client/molecule/default/prepare.yml
index fddd69fd2ab07db6f95b7553fa4c7a0431ebd22c..eefd77c3d02929d5fe3bed6cc81072fdb26e7060 100644
--- a/roles/ldap_client/molecule/default/prepare.yml
+++ b/roles/ldap_client/molecule/default/prepare.yml
@@ -2,17 +2,14 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
diff --git a/roles/ldap_server/molecule/default/prepare.yml b/roles/ldap_server/molecule/default/prepare.yml
index b8fe70ad6d3b51be79b68e000cec88983b673e5b..f39aa74bc1ae8d161c37032696a92716e05b7f75 100644
--- a/roles/ldap_server/molecule/default/prepare.yml
+++ b/roles/ldap_server/molecule/default/prepare.yml
@@ -1,6 +1,6 @@
 ---
 
-- name: Set-up fixtures
+- name: Prepare, test fixtures
   hosts: localhost
   connection: local
   gather_facts: false
@@ -36,17 +36,14 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
@@ -60,7 +57,21 @@
         group: root
         mode: 0644
 
-- hosts: client
+    - name: Remove the ss utility (see https://github.com/philpep/testinfra/pull/320)
+      file:
+        path: "/bin/ss"
+        state: absent
+
+    - name: Install tools for testing
+      apt:
+        name:
+          - net-tools
+          - nmap
+          - gnutls-bin
+        state: present
+
+- name: Prepare, helpers
+  hosts: client
   become: true
   tasks:
 
@@ -82,7 +93,8 @@
         192.168.56.21: parameters-mandatory-bookworm
         192.168.56.22: parameters-optional-bookworm
 
-- hosts: parameters-optional
+- name: Prepare, test fixtures
+  hosts: parameters-optional
   become: true
   tasks:
 
@@ -98,7 +110,8 @@
       with_dict:
         127.0.2.1: parameters-optional
 
-- hosts: parameters-mandatory
+- name: Prepare, test fixtures
+  hosts: parameters-mandatory
   become: true
   tasks:
 
@@ -114,7 +127,8 @@
       with_dict:
         127.0.2.1: parameters-mandatory
 
-- hosts: backup-server
+- name: Prepare, helpers
+  hosts: backup-server
   become: true
   roles:
     - role: backup_server
@@ -126,20 +140,3 @@
         - server: localhost
           ip: 127.0.0.1
           public_key: "{{ lookup('file', 'tests/data/ssh/parameters-optional.pub') }}"
-
-- hosts: parameters-mandatory,parameters-optional
-  become: true
-  tasks:
-
-    - name: Remove the ss utility (see https://github.com/philpep/testinfra/pull/320)
-      file:
-        path: "/bin/ss"
-        state: absent
-
-    - name: Install tools for testing
-      apt:
-        name:
-          - net-tools
-          - nmap
-          - gnutls-bin
-        state: present
diff --git a/roles/mail_forwarder/molecule/default/prepare.yml b/roles/mail_forwarder/molecule/default/prepare.yml
index 9ed70c614048a8fd9ee502f314f38b31e39ed8f6..1d54b9fd723b49a1719b966263953741e2b30b7e 100644
--- a/roles/mail_forwarder/molecule/default/prepare.yml
+++ b/roles/mail_forwarder/molecule/default/prepare.yml
@@ -1,6 +1,6 @@
 ---
 
-- name: Set-up fixtures
+- name: Prepare, test fixtures
   hosts: localhost
   connection: local
   gather_facts: false
@@ -34,26 +34,19 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Set-up the hosts file
       lineinfile:
         path: /etc/hosts
@@ -75,7 +68,8 @@
         name: gnutls-bin
         state: present
 
-- hosts: clients
+- name: Prepare, helpers
+  hosts: clients
   become: true
   tasks:
 
@@ -104,7 +98,8 @@
     - name: Update CA certificate cache
       command: /usr/sbin/update-ca-certificates --fresh
 
-- hosts: mail-servers
+- name: Prepare, helpers
+  hosts: mail-servers
   become: true
   tasks:
 
@@ -174,7 +169,8 @@
         name: postfix
         state: restarted
 
-- hosts: parameters-optional
+- name: Prepare, test fixtures
+  hosts: parameters-optional
   become: true
   tasks:
 
diff --git a/roles/mail_server/molecule/default/prepare.yml b/roles/mail_server/molecule/default/prepare.yml
index 93303a1c894c75abdf229df8e4b3b94c7e02d6ba..ba20de4155ccf89dfe2968713614d3cbabda07a2 100644
--- a/roles/mail_server/molecule/default/prepare.yml
+++ b/roles/mail_server/molecule/default/prepare.yml
@@ -1,6 +1,6 @@
 ---
 
-- name: Set-up fixtures
+- name: Prepare, test fixtures
   hosts: localhost
   connection: local
   gather_facts: false
@@ -46,17 +46,13 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
@@ -69,7 +65,7 @@
           - nmap
         state: present
 
-- name: Set-up a local ClamAV database mirror to avoid hitting upstream rate limits
+- name: Prepare, helpers, local ClamAV database mirror (avoid upstream rate limits)
   hosts: clamav-database
   become: true
   tasks:
@@ -173,7 +169,8 @@
         name: nginx
         state: restarted
 
-- hosts: bookworm
+- name: Prepare, test fixtures
+  hosts: bookworm
   become: true
   tasks:
 
@@ -213,7 +210,8 @@
         192.168.56.31: "parameters-mandatory parameters-mandatory-bookworm"
         192.168.56.32: "parameters-optional parameters-optional-bookworm"
 
-- hosts: client
+- name: Prepare, helpers
+  hosts: client
   become: true
   tasks:
 
@@ -336,13 +334,15 @@
         name: postfix
         state: restarted
 
-- hosts: ldap-server
+- name: Prepare, helpers
+  hosts: ldap-server
   become: true
   roles:
     - ldap_server
     - backup_server
 
-- hosts: ldap-server
+- name: Prepare, test fixtures
+  hosts: ldap-server
   become: true
   tasks:
 
@@ -420,7 +420,8 @@
           - uid=john,ou=people,dc=local
           - uid=jane,ou=people,dc=local
 
-- hosts: parameters-mandatory,parameters-optional
+- name: Prepare, test fixtures
+  hosts: parameters-mandatory,parameters-optional
   become: true
   tasks:
 
diff --git a/roles/php_website/molecule/default/prepare.yml b/roles/php_website/molecule/default/prepare.yml
index 8e6bf3dd17750b7d5fcb4e16eed0cb4007d142d0..7c284cf492336ff3983e3f2e031525b7e6edb44b 100644
--- a/roles/php_website/molecule/default/prepare.yml
+++ b/roles/php_website/molecule/default/prepare.yml
@@ -1,6 +1,6 @@
 ---
 
-- name: Set-up fixtures
+- name: Prepare, test fixtures
   hosts: localhost
   connection: local
   gather_facts: false
@@ -38,17 +38,15 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
       become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
diff --git a/roles/preseed/molecule/default/prepare.yml b/roles/preseed/molecule/default/prepare.yml
index 058ffa32bc51b8303ffe67c7dad6ff72ec09d41e..eefd77c3d02929d5fe3bed6cc81072fdb26e7060 100644
--- a/roles/preseed/molecule/default/prepare.yml
+++ b/roles/preseed/molecule/default/prepare.yml
@@ -2,9 +2,15 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
+      changed_when: false
+
+    - name: Update all caches to avoid errors due to missing remote archives
+      apt:
+        update_cache: true
       changed_when: false
diff --git a/roles/web_server/molecule/default/prepare.yml b/roles/web_server/molecule/default/prepare.yml
index 90e28a280cd84ee3834bfebc24d5eb9d3a698e99..4b6039e3e89142d7773bd011e505ec30662c2cc4 100644
--- a/roles/web_server/molecule/default/prepare.yml
+++ b/roles/web_server/molecule/default/prepare.yml
@@ -1,6 +1,6 @@
 ---
 
-- name: Set-up fixtures
+- name: Prepare, test fixtures
   hosts: localhost
   connection: local
   gather_facts: false
@@ -36,17 +36,14 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
@@ -59,7 +56,8 @@
           - nmap
         state: present
 
-- hosts: bookworm
+- name: Prepare, test fixtures
+  hosts: bookworm
   become: true
   tasks:
 
@@ -81,7 +79,8 @@
         mode: 0644
         state: present
 
-- hosts: all
+- name: Prepare, test fixtures
+  hosts: all
   become: true
   tasks:
 
@@ -104,7 +103,8 @@
         name: curl
         state: present
 
-- hosts: client
+- name: Prepare, helpers
+  hosts: client
   become: true
   tasks:
 
diff --git a/roles/wsgi_website/molecule/default/prepare.yml b/roles/wsgi_website/molecule/default/prepare.yml
index 8ce1940a144d63a9a2d8b7f91149abae6b878fbf..576b25f7ade46c2e578b0f3fb24e3828f5af047a 100644
--- a/roles/wsgi_website/molecule/default/prepare.yml
+++ b/roles/wsgi_website/molecule/default/prepare.yml
@@ -1,6 +1,6 @@
 ---
 
-- name: Set-up fixtures
+- name: Prepare, test fixtures
   hosts: localhost
   connection: local
   gather_facts: false
@@ -40,22 +40,29 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
-      become: true
       changed_when: false
 
-- hosts: wsgi-website
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
       changed_when: false
 
+    - name: Remove the ss utility (see https://github.com/philpep/testinfra/pull/320)
+      file:
+        path: "/bin/ss"
+        state: absent
+
+- name: Prepare, test fixtures
+  hosts: wsgi-website
+  become: true
+  tasks:
+
     - name: Set-up /etc/hosts entries
       lineinfile:
         dest: /etc/hosts
@@ -118,11 +125,6 @@
         group: user
         shell: /bin/bash
 
-    - name: Remove the ss utility (see https://github.com/philpep/testinfra/pull/320)
-      file:
-        path: "/bin/ss"
-        state: absent
-
   handlers:
 
     - name: Restart Postfix
diff --git a/roles/xmpp_server/molecule/default/prepare.yml b/roles/xmpp_server/molecule/default/prepare.yml
index 1111e787c5fe75f0d7b8106cfc3cc64de42e3989..9a18e4048d553a8d0dc0cd80983793ef418faf6a 100644
--- a/roles/xmpp_server/molecule/default/prepare.yml
+++ b/roles/xmpp_server/molecule/default/prepare.yml
@@ -1,6 +1,6 @@
 ---
 
-- name: Set-up fixtures
+- name: Prepare, test fixtures
   hosts: localhost
   connection: local
   gather_facts: false
@@ -47,17 +47,15 @@
 
 - name: Prepare
   hosts: all
+  become: true
   gather_facts: false
   tasks:
+
     - name: Install python for Ansible
       raw: test -e /usr/bin/python3 || (apt -y update && apt install -y python3-minimal)
       become: true
       changed_when: false
 
-- hosts: all
-  become: true
-  tasks:
-
     - name: Update all caches to avoid errors due to missing remote archives
       apt:
         update_cache: true
@@ -76,7 +74,8 @@
         regexp: "host\\.name\\)"
         replace: "host.targetname)"
 
-- hosts: bookworm
+- name: Prepare, test fixtures
+  hosts: bookworm
   become: true
   tasks:
 
@@ -113,7 +112,8 @@
         192.168.56.31: "parameters-mandatory domain1 proxy.domain1 conference.domain1"
         192.168.56.32: "parameters-optional domain2 proxy.domain2 conference.domain2 domain3 proxy.domain3 conference.domain3"
 
-- hosts: clients
+- name: Prepare, helpers
+  hosts: clients
   become: true
   tasks:
 
@@ -187,13 +187,15 @@
     - name: Update CA certificate cache
       command: /usr/sbin/update-ca-certificates --fresh
 
-- hosts: ldap-server
+- name: Prepare, helpers
+  hosts: ldap-server
   become: true
   roles:
     - ldap_server
     - backup_server
 
-- hosts: ldap-server
+- name: Prepare, test fixtures
+  hosts: ldap-server
   become: true
   tasks:
 
@@ -258,7 +260,8 @@
           - uid=mick,ou=people,dc=local
           - uid=eve,ou=people,dc=local
 
-- hosts: parameters-mandatory,parameters-optional
+- name: Prepare, test fixtures
+  hosts: parameters-mandatory,parameters-optional
   become: true
   tasks: