diff --git a/core/core.services.yml b/core/core.services.yml
index e6dd840..bf6698b 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -438,6 +438,8 @@ services:
   entity.query.sql:
     class: Drupal\Core\Entity\Query\Sql\QueryFactory
     arguments: ['@database']
+    tags:
+      - { name: backend_overridable }
   entity.query.keyvalue:
     class: Drupal\Core\Entity\KeyValueStore\Query\QueryFactory
     arguments: ['@keyvalue']
diff --git a/core/modules/ban/ban.services.yml b/core/modules/ban/ban.services.yml
index 7f55ae6..4f5b28d 100644
--- a/core/modules/ban/ban.services.yml
+++ b/core/modules/ban/ban.services.yml
@@ -2,6 +2,8 @@ services:
   ban.ip_manager:
     class: Drupal\ban\BanIpManager
     arguments: ['@database']
+    tags:
+      - { name: backend_overridable }
   ban.subscriber:
     class: Drupal\ban\EventSubscriber\BanSubscriber
     tags:
diff --git a/core/modules/book/book.services.yml b/core/modules/book/book.services.yml
index 8dc0ec4..b86f44f 100644
--- a/core/modules/book/book.services.yml
+++ b/core/modules/book/book.services.yml
@@ -7,6 +7,8 @@ services:
   book.manager:
     class: Drupal\book\BookManager
     arguments: ['@database', '@entity.manager', '@string_translation', '@config.factory']
+    tags:
+      - { name: backend_overridable }
   book.outline:
     class: Drupal\book\BookOutline
     arguments: ['@book.manager']
diff --git a/core/modules/comment/comment.services.yml b/core/modules/comment/comment.services.yml
index 94540d1..18405ac 100644
--- a/core/modules/comment/comment.services.yml
+++ b/core/modules/comment/comment.services.yml
@@ -12,6 +12,8 @@ services:
   comment.statistics:
     class: Drupal\comment\CommentStatistics
     arguments: ['@database', '@current_user', '@entity.manager', '@state']
+    tags:
+      - { name: backend_overridable }
 
   comment.post_render_cache:
     class: Drupal\comment\CommentPostRenderCache
diff --git a/core/modules/file/file.services.yml b/core/modules/file/file.services.yml
index 2ded051..1c463af 100644
--- a/core/modules/file/file.services.yml
+++ b/core/modules/file/file.services.yml
@@ -2,3 +2,5 @@ services:
   file.usage:
     class: Drupal\file\FileUsage\DatabaseFileUsageBackend
     arguments: ['@database']
+    tags:
+      - { name: backend_overridable }
diff --git a/core/modules/forum/forum.services.yml b/core/modules/forum/forum.services.yml
index 92f04af..c8d6e33 100644
--- a/core/modules/forum/forum.services.yml
+++ b/core/modules/forum/forum.services.yml
@@ -15,3 +15,5 @@ services:
   forum.index_storage:
     class: Drupal\forum\ForumIndexStorage
     arguments: ['@database', '@forum_manager']
+    tags:
+      - { name: backend_overridable }
diff --git a/core/modules/locale/locale.services.yml b/core/modules/locale/locale.services.yml
index 7a0ced3..8268608 100644
--- a/core/modules/locale/locale.services.yml
+++ b/core/modules/locale/locale.services.yml
@@ -5,6 +5,8 @@ services:
   locale.storage:
     class: Drupal\locale\StringDatabaseStorage
     arguments: ['@database']
+    tags:
+      - { name: backend_overridable }
   string_translator.locale.lookup:
     class: Drupal\locale\LocaleTranslation
     arguments: ['@locale.storage', '@cache.default', '@lock', '@config.factory', '@language_manager']
diff --git a/core/modules/node/node.services.yml b/core/modules/node/node.services.yml
index 69cadb2..85d998a 100644
--- a/core/modules/node/node.services.yml
+++ b/core/modules/node/node.services.yml
@@ -6,11 +6,14 @@ services:
   node.grant_storage:
     class: Drupal\node\NodeGrantDatabaseStorage
     arguments: ['@database', '@module_handler']
+    tags:
+      - { name: backend_overridable }
   access_check.node.revision:
     class: Drupal\node\Access\NodeRevisionAccessCheck
     arguments: ['@entity.manager', '@database']
     tags:
       - { name: access_check, applies_to: _access_node_revision }
+      - { name: backend_overridable }
   access_check.node.add:
     class: Drupal\node\Access\NodeAddAccessCheck
     arguments: ['@entity.manager']
diff --git a/core/modules/system/system.services.yml b/core/modules/system/system.services.yml
index 2b7046c..1033fae 100644
--- a/core/modules/system/system.services.yml
+++ b/core/modules/system/system.services.yml
@@ -6,6 +6,8 @@ services:
   system.manager:
     class: Drupal\system\SystemManager
     arguments: ['@module_handler', '@database', '@entity.manager', '@request_stack']
+  tags:
+    - { name: backend_overridable }
   system.breadcrumb.default:
     class: Drupal\system\PathBasedBreadcrumbBuilder
     arguments: ['@router.request_context', '@access_manager', '@router', '@path_processor_manager', '@config.factory',  '@title_resolver', '@current_user']