diff --git a/R/tasks/r-installation.yml b/R/tasks/r-installation.yml
index 91448e8..6ea0b67 100644
--- a/R/tasks/r-installation.yml
+++ b/R/tasks/r-installation.yml
@@ -9,7 +9,7 @@
 
 - name: Remove the hold state from the debian R packages
   shell: apt-mark unhold {{ item }}
-  with_items: '( {{ r_base_packages_hold_list }} | default [] )'
+  with_items: '{{ r_base_packages_hold_list | default([]) }}'
   when: r_base_packages_hold_list is defined
   ignore_errors: True
   tags: [ 'r_software', 'r_pkg', 'r_pkg_hold' ]
@@ -21,14 +21,14 @@
 
 - name: When we install specific R deb packages, put them on hold
   shell: apt-mark hold {{ item }}
-  with_items: '( {{ r_base_packages_hold_list }} | default [] )'
+  with_items: '{{ r_base_packages_hold_list| default([]) }}'
   when: r_base_specific_version
   ignore_errors: True
   tags: [ 'r_software', 'r_pkg', 'r_pkg_hold' ]
 
 - name: Install the R additional modules from the deb repo
   apt: pkg={{ item }} state={{ r_packages_state }} force=yes
-  with_items: '( {{ r_plugins_packages_list }} | default [] )'
+  with_items: '{{ r_plugins_packages_list | default([]) }}'
   when: r_plugins_from_deb
   tags: [ 'r_software', 'r_pkg' ]
 
@@ -61,7 +61,7 @@
 
 - name: Get the R packages sources that need to be installed
   get_url: url={{ item.url }} dest={{ r_source_plugins_dest_dir }}
-  with_items: '( {{ r_plugins_from_sources }} | default [] )'
+  with_items: '{{ r_plugins_from_sources | default([]) }}'
   when: r_plugins_install_specific_source
   tags: [ 'r_software', 'r_pkg', 'r_plugins', 'r_plugins_version' ]
   
@@ -71,7 +71,7 @@
   register: install_s_plugins_result
   failed_when: "install_s_plugins_result.rc != 0 or 'had non-zero exit status' in install_s_plugins_result.stderr"
   changed_when: '"Added" in install_s_plugins_result.stdout'
-  with_items: '( {{ r_plugins_from_sources }} | default [] )'
+  with_items: '{{ r_plugins_from_sources | default([]) }}'
   when: r_plugins_install_specific_source
   ignore_errors: True
   tags: [ 'r_software', 'r_pkg', 'r_plugins', 'r_plugins_version' ]
@@ -82,7 +82,7 @@
   register: install_s_plugins_result
   failed_when: "install_s_plugins_result.rc != 0 or 'had non-zero exit status' in install_s_plugins_result.stderr"
   changed_when: '"Added" in install_s_plugins_result.stdout'
-  with_items: '( {{ r_plugins_from_sources }} | default [] )'
+  with_items: '{{ r_plugins_from_sources | default([]) }}'
   when: r_plugins_install_specific_source
   tags: [ 'r_software', 'r_pkg', 'r_plugins', 'r_plugins_version' ]
 
@@ -92,7 +92,7 @@
   register: install_plugins_result
   failed_when: "install_plugins_result.rc != 0 or 'had non-zero exit status' in install_plugins_result.stderr"
   changed_when: "'Added' in install_plugins_result.stdout"
-  with_items: '( {{ r_plugins_list_to_install }} | default [] )'
+  with_items: '{{ r_plugins_list_to_install | default([]) }}'
   when: r_plugins_install_latest_source
   tags: [ 'r_software', 'r_pkg', 'r_plugins' ]
 
@@ -102,7 +102,7 @@
   register: install_github_plugins_result
   failed_when: "install_github_plugins_result.rc != 0 or 'had non-zero exit status' in install_github_plugins_result.stderr"
   changed_when: "'Added' in install_github_plugins_result.stdout"
-  with_items: '( {{ r_plugins_from_github }} | default [] )'
+  with_items: '{{ r_plugins_from_github | default([]) }}'
   when: r_plugins_from_github is defined
   tags: [ 'r_software', 'r_pkg', 'r_plugins', 'r_plugins_github' ]
 
@@ -112,6 +112,6 @@
   register: remove_plugins_result
   failed_when: remove_plugins_result.rc != 0
   changed_when: "'Removed' in remove_plugins_result.stdout"
-  with_items: '( {{ r_plugins_list_to_remove }} | default [] )'
+  with_items: '{{ r_plugins_list_to_remove | default([]) }}'
   when: r_plugins_list_to_remove is defined
   tags: [ 'r_software', 'r_pkg', 'r_plugins' ]