diff -u b/core/modules/file/src/Tests/FileFieldRevisionTest.php b/core/modules/file/src/Tests/FileFieldRevisionTest.php
--- b/core/modules/file/src/Tests/FileFieldRevisionTest.php
+++ b/core/modules/file/src/Tests/FileFieldRevisionTest.php
@@ -10,7 +10,6 @@
  * @group file
  */
 class FileFieldRevisionTest extends FileFieldTestBase {
-
   /**
    * Tests creating multiple revisions of a node and managing attached files.
    *
reverted:
--- b/core/modules/node/src/Tests/NodeAdminTest.php
+++ a/core/modules/node/src/Tests/NodeAdminTest.php
@@ -69,7 +69,7 @@
     foreach (['dd', 'aa', 'DD', 'bb', 'cc', 'CC', 'AA', 'BB'] as $prefix) {
       $changed += 1000;
       $node = $this->drupalCreateNode(['title' => $prefix . $this->randomMachineName(6)]);
+      db_update('node_field_data')
-      \Drupal::database()->update('node_field_data')
         ->fields(['changed' => $changed])
         ->condition('nid', $node->id())
         ->execute();
reverted:
--- b/core/modules/node/src/Tests/NodeBlockFunctionalTest.php
+++ a/core/modules/node/src/Tests/NodeBlockFunctionalTest.php
@@ -70,13 +70,13 @@
     $node3 = $this->drupalCreateNode($default_settings);
 
     // Change the changed time for node so that we can test ordering.
+    db_update('node_field_data')
-    \Drupal::database()->update('node_field_data')
       ->fields([
         'changed' => $node1->getChangedTime() + 100,
       ])
       ->condition('nid', $node2->id())
       ->execute();
+    db_update('node_field_data')
-    \Drupal::database()->update('node_field_data')
       ->fields([
         'changed' => $node1->getChangedTime() + 200,
       ])
diff -u b/core/modules/tracker/tracker.module b/core/modules/tracker/tracker.module
--- b/core/modules/tracker/tracker.module
+++ b/core/modules/tracker/tracker.module
@@ -269,7 +269,7 @@
     ])
     ->execute();
   // Update the times for all the other users tracking the post.
-  \Drupal::database()->update('tracker_user')
+  db_update('tracker_user')
     ->condition('nid', $nid)
     ->fields([
       'changed' => $changed,
@@ -279,7 +279,7 @@
     ])
     ->execute();
   // Update the times for all the other users tracking the post.
-  db_update('tracker_user')
+  \Drupal::database()->update('tracker_user')
     ->condition('nid', $nid)
     ->fields([
       'changed' => $changed,
only in patch2:
unchanged:
--- a/core/includes/database.inc
+++ b/core/includes/database.inc
@@ -26,7 +26,7 @@
  * instead.
  *
  * Do not use this function for INSERT, UPDATE, or DELETE queries. Those should
- * be handled via db_insert(), db_update() and db_delete() respectively.
+ * be handled via db_insert(), \Drupal::database()->update() and db_delete() respectively.
  *
  * @param string|\Drupal\Core\Database\StatementInterface $query
  *   The prepared statement query to run. Although it will accept both named and
@@ -206,7 +206,7 @@ function db_merge($table, array $options = []) {
  * @see \Drupal\Core\Database\Connection::update()
  * @see \Drupal\Core\Database\Connection::defaultOptions()
  */
-function db_update($table, array $options = []) {
+function \Drupal::database()->update($table, array $options = []) {
   if (empty($options['target']) || $options['target'] == 'replica') {
     $options['target'] = 'default';
   }
only in patch2:
unchanged:
--- a/core/modules/node/tests/src/Functional/NodeAdminTest.php
+++ b/core/modules/node/tests/src/Functional/NodeAdminTest.php
@@ -69,7 +69,7 @@ public function testContentAdminSort() {
     foreach (['dd', 'aa', 'DD', 'bb', 'cc', 'CC', 'AA', 'BB'] as $prefix) {
       $changed += 1000;
       $node = $this->drupalCreateNode(['title' => $prefix . $this->randomMachineName(6)]);
-      db_update('node_field_data')
+      \Drupal::database()->update('node_field_data')
         ->fields(['changed' => $changed])
         ->condition('nid', $node->id())
         ->execute();
only in patch2:
unchanged:
--- a/core/modules/node/tests/src/Functional/NodeBlockFunctionalTest.php
+++ b/core/modules/node/tests/src/Functional/NodeBlockFunctionalTest.php
@@ -70,13 +70,13 @@ public function testRecentNodeBlock() {
     $node3 = $this->drupalCreateNode($default_settings);
 
     // Change the changed time for node so that we can test ordering.
-    db_update('node_field_data')
+    \Drupal::database()->update('node_field_data')
       ->fields([
         'changed' => $node1->getChangedTime() + 100,
       ])
       ->condition('nid', $node2->id())
       ->execute();
-    db_update('node_field_data')
+    \Drupal::database()->update('node_field_data')
       ->fields([
         'changed' => $node1->getChangedTime() + 200,
       ])