namespace Drupal\Tests\image\Kernel;
-use Drupal\Component\Utility\Unicode;
use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\entity_test\Entity\EntityTest;
use Drupal\field\Entity\FieldConfig;
$this->entityType = 'entity_test';
$this->bundle = $this->entityType;
- $this->fieldName = Unicode::strtolower($this->randomMachineName());
+ $this->fieldName = mb_strtolower($this->randomMachineName());
FieldStorageConfig::create([
'entity_type' => $this->entityType,