diff -u b/core/includes/database.inc b/core/includes/database.inc
--- b/core/includes/database.inc
+++ b/core/includes/database.inc
@@ -646,9 +646,10 @@
  */
 function db_table_exists($table) {
   @trigger_error(
-    "Deprecated as of Drupal 8.0.x, will be removed in Drupal 9.0.0. Instead, get a database connection injected into your service from the container, get its schema driver, and call tableExists() on it. For example, \$injected_database->schema()->tableExists(\$table);",
+    'db_table_exists() is deprecated in Drupal 8.0.x and will be removed before Drupal 9.0.0. Use $injected_database->schema()->tableExists($table) instead. See https://www.drupal.org/node/2947929.',
     E_USER_DEPRECATED
   );
+
   return Database::getConnection()->schema()->tableExists($table);
 }
 
diff -u b/core/tests/Drupal/KernelTests/Core/Database/RegressionTest.php b/core/tests/Drupal/KernelTests/Core/Database/RegressionTest.php
--- b/core/tests/Drupal/KernelTests/Core/Database/RegressionTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/RegressionTest.php
@@ -40,7 +40,7 @@
    *
    * @group legacy
    *
-   * @expectedDeprecation Deprecated as of Drupal 8.0.x, will be removed in Drupal 9.0.0. Instead, get a database connection injected into your service from the container, get its schema driver, and call tableExists() on it. For example, $injected_database->schema()->tableExists($table);
+   * @expectedDeprecation db_table_exists() is deprecated in Drupal 8.0.x and will be removed before Drupal 9.0.0. Use $injected_database->schema()->tableExists($table) instead. See https://www.drupal.org/node/2947929.
    */
   public function testDBTableExists() {
     $this->assertSame(TRUE, db_table_exists('test'), 'Returns true for existent table.');