Sascha Grossenbacher
--- a/core/modules/system/tests/modules/entity_test/src/EntityTestTranslationHandler.php 0 → 100644
+++ b/core/modules/system/tests/modules/entity_test/src/EntityTestTranslationHandler.php 0 → 100644
+
+namespace Drupal\entity_test;
+
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\content_translation\ContentTranslationHandler;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Defines the translation handler for entity test entities.
+ */
+class EntityTestTranslationHandler extends ContentTranslationHandler {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function entityFormEntityBuild($entity_type, EntityInterface $entity, array $form, FormStateInterface $form_state) {
--- a/core/modules/content_translation/tests/src/Functional/ContentTranslationMetadataTrait.php 0 → 100644
+++ b/core/modules/content_translation/tests/src/Functional/ContentTranslationMetadataTrait.php 0 → 100644
+        }
+      }
+
+      // Assert there is no content translation meta data field.
+      $this->assertSession()->fieldNotExists("content_translation[$field_name]");
+    }
+
+    return $edit;
+  }
+
+  /**
+   * Returns whether a given field name exists in the field storage definitions.
+   *
+   * @see \Drupal\content_translation\ContentTranslationHandler::checkFieldStorageDefinitionTranslatability
+   */
+  protected function hasMetadataField($field_name) {
--- a/core/modules/content_translation/tests/src/Functional/ContentTranslationMetadataTrait.php 0 → 100644
+++ b/core/modules/content_translation/tests/src/Functional/ContentTranslationMetadataTrait.php 0 → 100644
+
+namespace Drupal\Tests\content_translation\Functional;
+
+use Drupal\user\EntityOwnerInterface;
+
+/**
+ * Provides methods to assert content translation meta data fields.
+ *
+ * Can be used by test classes that extend \Drupal\Tests\BrowserTestBase.
+ */
+trait ContentTranslationMetadataTrait {
+
+  /**
+   * Gets the metadata field value.
+   */
+  protected function getMetadataValueAndAssertNoField($field_name, $field_value) {