diff -u b/core/lib/Drupal/Core/Database/Driver/mysql/Schema.php b/core/lib/Drupal/Core/Database/Driver/mysql/Schema.php
--- b/core/lib/Drupal/Core/Database/Driver/mysql/Schema.php
+++ b/core/lib/Drupal/Core/Database/Driver/mysql/Schema.php
@@ -378,7 +378,8 @@
 
   /**
    * @return string|null
-   *   The SQL definition of the foreign key or NULL if the definition is invalid.
+   *   The SQL definition of the foreign key or NULL if the
+   *   definition is invalid.
    */
   protected function createForeignKeySql($key_name, $fields) {
     $operations = ['no action', 'restrict', 'cascade', 'set null', 'set default'];
diff -u b/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php b/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php
--- b/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php
+++ b/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php
@@ -455,7 +455,8 @@
 
   /**
    * @return string|null
-   *   The SQL definition of the foreign key or NULL if the definition is invalid.
+   *   The SQL definition of the foreign key or NULL if the
+   *   definition is invalid.
    */
   protected function createForeignKeySql($name, $key_name, $fields) {
     $operations = ['no action', 'restrict', 'cascade', 'set null', 'set default'];
diff -u b/core/tests/Drupal/KernelTests/KernelTestBase.php b/core/tests/Drupal/KernelTests/KernelTestBase.php
--- b/core/tests/Drupal/KernelTests/KernelTestBase.php
+++ b/core/tests/Drupal/KernelTests/KernelTestBase.php
@@ -693,8 +693,9 @@
       $tables = Database::getConnection()->schema()->findTables('%');
       // Use transactional DDL if available.
       $txn = Database::getConnection()->startTransaction();
-      // MySQL does not have a transactional DDL so we must disable foreign keys to
-      // delete tables that have fk relationships between them.
+      // MySQL does not have a transactional DDL so we must
+      // disable foreign keys to delete tables that have
+      // fk relationships between them.
       $is_mysql = Database::getConnection()->databaseType() === 'mysql';
       if ($is_mysql) {
         Database::getConnection()->query('SET foreign_key_checks = 0');