[#2570593]: Fix failing test: EntityTypeInterface has 'getKey()' not 'key()'

core/lib/Drupal/Core/Entity/ContentEntityBase.php

@@ -1136,7 +1136,7 @@ public static function create(array $values = []) {
 
     // Always explicitly specify the bundle if the entity has a bundle class.
     if ($storage instanceof BundleEntityStorageInterface && ($bundle = $storage->getBundleFromClass($class_name))) {
-      $values[$storage->getEntityType()->key('bundle')] = $bundle;
+      $values[$storage->getEntityType()->getKey('bundle')] = $bundle;
     }
 
     return $storage->create($values);