diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index f1e0be1..c4ad56d 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -766,7 +766,7 @@ function install_tasks($install_state) {
  * Returns a list of tasks that should be displayed to the end user.
  *
  * The output of this function is a list suitable for sending to
- * theme_task_list().
+ * theme_maintenance_task_list().
  *
  * @param $install_state
  *   An array of information about the current installation state.
@@ -775,7 +775,7 @@ function install_tasks($install_state) {
  *   A list of tasks, with keys equal to the machine-readable task name and
  *   values equal to the name that should be displayed.
  *
- * @see theme_task_list()
+ * @see theme_maintenance_task_list()
  */
 function install_tasks_to_display($install_state) {
   $displayed_tasks = array();
@@ -912,7 +912,7 @@ function install_display_output($output, $install_state) {
     // been completed.
     $active_task = $install_state['installation_finished'] ? NULL : $install_state['active_task'];
     $task_list = array(
-      '#theme' => 'task_list',
+      '#theme' => 'maintenance_task_list',
       '#items' => install_tasks_to_display($install_state),
       '#active' => $active_task,
     );
diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index b8c1288..2580765 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1575,7 +1575,7 @@ function template_preprocess_container(&$variables) {
  *     dangerous HTML such as SCRIPT tags.
  *   - active: The key for the currently active maintenance task.
  */
-function template_preprocess_task_list(&$variables) {
+function template_preprocess_maintenance_task_list(&$variables) {
   $items = $variables['items'];
   $active = $variables['active'];
 
@@ -2352,7 +2352,7 @@ function drupal_common_theme() {
       'render element' => 'page',
       'template' => 'install-page',
     ),
-    'task_list' => array(
+    'maintenance_task_list' => array(
       'variables' => array('items' => NULL, 'active' => NULL,  'variant' => NULL),
       'template' => 'maintenance-task-list',
     ),
diff --git a/core/modules/system/src/Controller/DbUpdateController.php b/core/modules/system/src/Controller/DbUpdateController.php
index 62752ae..f6544ac 100644
--- a/core/modules/system/src/Controller/DbUpdateController.php
+++ b/core/modules/system/src/Controller/DbUpdateController.php
@@ -477,7 +477,7 @@ protected function updateTasksList($active = NULL) {
     );
 
     $task_list = array(
-      '#theme' => 'task_list',
+      '#theme' => 'maintenance_task_list',
       '#items' => $tasks,
       '#active' => $active,
     );