diff --git a/core/includes/batch.inc b/core/includes/batch.inc
index 72742c6..52e8889 100644
--- a/core/includes/batch.inc
+++ b/core/includes/batch.inc
@@ -201,9 +201,6 @@ function _batch_progress_page() {
  *
  * @return array
  *   An array containing a completion value (in percent) and a status message.
- *
- * @deprecated as of Drupal 8.2.x, will be removed in Drupal 9.0.0. Use
- *   \Drupal\Core\Batch\BatchQueueController::processQueue() instead.
  */
 function _batch_process() {
   return BatchQueueController::processQueue();
@@ -211,9 +208,6 @@ function _batch_process() {
 
 /**
  * Returns the batch set being currently processed.
- *
- * @deprecated as of Drupal 8.2.x, will be removed in Drupal 9.0.0. Use
- *   \Drupal\Core\Batch\BatchQueueController::getCurrentSet() instead.
  */
 function &_batch_current_set() {
   return BatchQueueController::getCurrentSet();
@@ -229,9 +223,6 @@ function &_batch_current_set() {
  * @return true|null
  *   TRUE if a subsequent set was found in the batch; no value will be returned
  *   if no subsequent set was found.
- *
- * @deprecated as of Drupal 8.2.x, will be removed in Drupal 9.0.0. Use
- *   \Drupal\Core\Batch\BatchQueueController::hasNextSet() instead.
  */
 function _batch_next_set() {
   return BatchQueueController::nextSet();
@@ -242,9 +233,6 @@ function _batch_next_set() {
  *
  * Call the 'finished' callback of each batch set to allow custom handling of
  * the results and resolve page redirection.
- *
- * @deprecated as of Drupal 8.2.x, will be removed in Drupal 9.0.0. Use
- *   \Drupal\Core\Batch\BatchQueueController::finishedProcessing() instead.
  */
 function _batch_finished() {
   return BatchQueueController::finishedProcessing();
diff --git a/core/lib/Drupal/Core/Batch/BatchQueueController.php b/core/lib/Drupal/Core/Batch/BatchQueueController.php
index 223559a..ce104bc 100644
--- a/core/lib/Drupal/Core/Batch/BatchQueueController.php
+++ b/core/lib/Drupal/Core/Batch/BatchQueueController.php
@@ -241,6 +241,9 @@ public static function getQueueForBatch($batch) {
    *
    * @return array
    *   The current batch set.
+   *
+   * @deprecated This is an internal function and will be removed. Use
+   *   _batch_current_set() instead.
    */
   public static function &getCurrentSet() {
     return self::$batches['sets'][self::$batches['current_set']];
@@ -256,6 +259,9 @@ public static function &getCurrentSet() {
    * @return bool
    *   TRUE if a subsequent set was found in the batch; FALSE will be returned
    *   if no subsequent set was found.
+   *
+   * @deprecated This is an internal function and will be removed. Use
+   *   _batch_next_set() instead.
    */
   public static function nextSet() {
     if (isset(self::$batches['sets'][self::$batches['current_set'] + 1])) {
@@ -282,6 +288,9 @@ public static function nextSet() {
    *
    * @return array
    *   An array containing a completion value (in percent) and a status message.
+   *
+   * @deprecated This is an internal function and will be removed. Use
+   *   _batch_process() instead.
    */
   public static function processQueue() {
     $current_set = &self::getCurrentSet();
@@ -419,6 +428,9 @@ public static function processQueue() {
    * @return \Symfony\Component\HttpFoundation\RedirectResponse|false
    *   A redirect response to the completed page or NULL to stay at the current
    *   URL.
+   *
+   * @deprecated This is an internal function and will be removed. Use
+   *   _batch_finished() instead.
    */
   public static function finishedProcessing() {
     self::$batches = &batch_get();