diff --git a/tasks/configure.yml b/tasks/configure.yml
index ac4acd2..65ebcc1 100644
--- a/tasks/configure.yml
+++ b/tasks/configure.yml
@@ -26,7 +26,7 @@
     group: root
     mode: 0644
     force: "{{ item.force | default(False) }}"
-  with_items: mysql_config_include_files
+  with_items: "{{ mysql_config_include_files }}"
   notify: restart mysql
 
 - name: Create slow query log file (if configured).
diff --git a/tasks/databases.yml b/tasks/databases.yml
index 39ee42f..681e515 100644
--- a/tasks/databases.yml
+++ b/tasks/databases.yml
@@ -5,4 +5,4 @@
     collation: "{{ item.collation | default('utf8_general_ci') }}"
     encoding: "{{ item.encoding | default('utf8') }}"
     state: present
-  with_items: mysql_databases
+  with_items: "{{ mysql_databases }}"
diff --git a/tasks/secure-installation.yml b/tasks/secure-installation.yml
index a193a62..200dfeb 100644
--- a/tasks/secure-installation.yml
+++ b/tasks/secure-installation.yml
@@ -16,7 +16,7 @@
   shell: >
     mysql -u root -NBe
     'SET PASSWORD FOR "{{ mysql_root_username }}"@"{{ item }}" = PASSWORD("{{ mysql_root_password }}");'
-  with_items: mysql_root_hosts.stdout_lines
+  with_items: "{{ mysql_root_hosts.stdout_lines }}"
   when: mysql_install_packages | bool or mysql_root_password_update
 
 # Has to be after the root password assignment, for idempotency.
@@ -38,7 +38,7 @@
      name: ""
      host: "{{ item }}"
      state: absent
-  with_items: mysql_anonymous_hosts.stdout_lines
+  with_items: "{{ mysql_anonymous_hosts.stdout_lines }}"
 
 - name: Remove MySQL test database.
   mysql_db: "name='test' state=absent"
diff --git a/tasks/setup-Debian.yml b/tasks/setup-Debian.yml
index fb050ed..1158456 100644
--- a/tasks/setup-Debian.yml
+++ b/tasks/setup-Debian.yml
@@ -12,7 +12,7 @@
 
 - name: Ensure MySQL packages are installed.
   apt: "name={{ item }} state=installed"
-  with_items: mysql_packages
+  with_items: "{{ mysql_packages }}"
   register: deb_mysql_install_packages
 
 # Because Ubuntu starts MySQL as part of the install process, we need to stop
diff --git a/tasks/setup-RedHat.yml b/tasks/setup-RedHat.yml
index 85241b1..fc05bee 100644
--- a/tasks/setup-RedHat.yml
+++ b/tasks/setup-RedHat.yml
@@ -1,7 +1,7 @@
 ---
 - name: Ensure MySQL packages are installed.
   yum: "name={{ item }} state=installed enablerepo={{ mysql_enablerepo }}"
-  with_items: mysql_packages
+  with_items: "{{ mysql_packages }}"
   register: rh_mysql_install_packages
 
 - name: Ensure MySQL Python libraries are installed.
diff --git a/tasks/users.yml b/tasks/users.yml
index 0869439..06d769c 100644
--- a/tasks/users.yml
+++ b/tasks/users.yml
@@ -7,4 +7,4 @@
     priv: "{{ item.priv | default('*.*:USAGE') }}"
     state: present
     append_privs: "{{ item.append_privs | default('no') }}"
-  with_items: mysql_users
+  with_items: "{{ mysql_users }}"