diff --git a/app/views/components/_select_all_container.haml b/app/views/components/_select_all_container.haml
new file mode 100644
index 00000000..5fa91e2d
--- /dev/null
+++ b/app/views/components/_select_all_container.haml
@@ -0,0 +1,13 @@
+-#
+  Contenedor para las acciones en masa.
+
+  Es un formulario auto-contenido, que permite colocar los elementos
+  fuera del formulario para evitar anidarlos. Mientras los elementos
+  tengan el atributo `form` con el mismo parámetro `form_id`, el
+  navegador los va a asignar a este formulario.
+
+  @param path [String]
+  @param form_id [String]
+
+= form_tag path, id: form_id, method: :patch do
+  -# nada
diff --git a/app/views/moderation_queue/_accounts.haml b/app/views/moderation_queue/_accounts.haml
index 53d2f28e..65ff953f 100644
--- a/app/views/moderation_queue/_accounts.haml
+++ b/app/views/moderation_queue/_accounts.haml
@@ -1,6 +1,6 @@
 - form_id = 'actor_moderations_action_on_several'
 
-= form_tag site_actor_moderations_action_on_several_path, id: form_id, method: :patch
+= render 'components/select_all_container', path: site_actor_moderations_action_on_several_path, form_id: form_id
 
 .row.no-gutters.pt-2{ data: { controller: 'select-all' } }
   .col-1.d-flex.align-items-center
diff --git a/app/views/moderation_queue/_instances.haml b/app/views/moderation_queue/_instances.haml
index a707d48a..d9db967f 100644
--- a/app/views/moderation_queue/_instances.haml
+++ b/app/views/moderation_queue/_instances.haml
@@ -1,8 +1,7 @@
 - form_id = 'instance_moderation_action_on_several'
 
 %section
-  = form_tag site_instance_moderations_action_on_several_path, id: form_id, method: :patch
-
+  = render 'components/select_all_container', path: site_instance_moderations_action_on_several_path, form_id: form_id
   .row.no-gutters.pt-2{ data: { controller: 'select-all' } }
     .col-1.d-flex.align-items-center
       = render 'components/select_all', id: 'instances', form_id: form_id