diff --git a/core/modules/overlay/overlay.module b/core/modules/overlay/overlay.module
index 3f66776..53a8776 100644
--- a/core/modules/overlay/overlay.module
+++ b/core/modules/overlay/overlay.module
@@ -374,7 +374,7 @@ function overlay_preprocess_maintenance_page(&$variables) {
  *
  * @param array $variables
  *   An associative array containing:
- *   - elements: An associative array containing the properties of the element.
+ *   - page: A render element representing the page.
  */
 function template_preprocess_overlay(&$variables) {
   $variables['tabs'] = menu_primary_local_tasks();
diff --git a/core/modules/system/tests/modules/theme_test/theme_test.module b/core/modules/system/tests/modules/theme_test/theme_test.module
index 15835aa..a794844 100644
--- a/core/modules/system/tests/modules/theme_test/theme_test.module
+++ b/core/modules/system/tests/modules/theme_test/theme_test.module
@@ -183,8 +183,7 @@ function theme_theme_test_function_template_override($variables) {
  *
  * @param array $variables
  *   An associative array containing:
- *   - attributes: An associative array containing the properties of the
- *     element.
+ *   - elements: An associative array containing the properties of the element.
  */
 function template_preprocess_theme_test_render_element(&$variables) {
   $variables['attributes']['data-variables-are-preprocessed'] = TRUE;