diff --git a/tests/modules/dynamic_entity_reference_entity_test/dynamic_entity_reference_entity_test.module b/tests/modules/dynamic_entity_reference_entity_test/dynamic_entity_reference_entity_test.module
index e2afc59..34778a3 100644
--- a/tests/modules/dynamic_entity_reference_entity_test/dynamic_entity_reference_entity_test.module
+++ b/tests/modules/dynamic_entity_reference_entity_test/dynamic_entity_reference_entity_test.module
@@ -17,6 +17,7 @@ function dynamic_entity_reference_entity_test_entity_base_field_info(EntityTypeI
   // 'entity_test' with no data table and 'entity_test_mul' is with data table.
   if ($entity_type->id() == 'entity_test' || $entity_type->id() == 'entity_test_mul') {
     $fields['dynamic_references'] = BaseFieldDefinition::create('dynamic_entity_reference')
+      ->setName('dynamic_references')
       ->setLabel((string) new TranslatableMarkup('References'))
       ->setDescription((string) new TranslatableMarkup('Reference another entity.'))
       ->setRequired(FALSE)
@@ -41,29 +42,44 @@ function dynamic_entity_reference_entity_test_entity_base_field_info(EntityTypeI
           ],
           'entity_test_mul' => [
             'handler' => "default:entity_test_mul",
-            'handler_settings' => [],
+            'handler_settings' => [
+              'target_bundles' => [
+                'entity_test_mul' => 'entity_test_mul',
+              ],
+            ],
           ],
         ]);
     }
     else {
       $fields['dynamic_references']
-      ->setSettings([
-        'exclude_entity_types' => FALSE,
-        'entity_type_ids' => [
-          'entity_test' => 'entity_test',
-          'entity_test_mul' => 'entity_test_mul',
-        ],
-        'entity_test' => [
-          'handler' => "default:entity_test",
-          'handler_settings' => [],
-        ],
-        'entity_test_mul' => [
-          'handler' => "default:entity_test_mul",
-          'handler_settings' => [],
-        ],
-      ]);
+        ->setSettings([
+          'exclude_entity_types' => FALSE,
+          'entity_type_ids' => [
+            'entity_test' => 'entity_test',
+            'entity_test_mul' => 'entity_test_mul',
+          ],
+          'entity_test' => [
+            'handler' => "default:entity_test",
+            'handler_settings' => [
+              'target_bundles' => [
+                'entity_test' => 'entity_test',
+              ],
+            ],
+          ],
+          'entity_test_mul' => [
+            'handler' => "default:entity_test_mul",
+            'handler_settings' => [
+              'target_bundles' => [
+                'entity_test_mul' => 'entity_test_mul',
+              ],
+            ],
+          ],
+        ]);
+    }
+    if (\Drupal::state()->get('dynamic_entity_reference_entity_test_with_two_base_fields', FALSE)) {
+      $fields['der'] = BaseFieldDefinition::createFromFieldStorageDefinition($fields['dynamic_references'])
+        ->setName('der');
     }
-
   }
 
   return $fields;
diff --git a/tests/src/Kernel/DynamicEntityReferenceBaseFieldTest.php b/tests/src/Kernel/DynamicEntityReferenceBaseFieldTest.php
index 2e2cee1..8b49921 100644
--- a/tests/src/Kernel/DynamicEntityReferenceBaseFieldTest.php
+++ b/tests/src/Kernel/DynamicEntityReferenceBaseFieldTest.php
@@ -4,6 +4,8 @@ namespace Drupal\Tests\dynamic_entity_reference\Kernel;
 
 use Drupal\config\Tests\SchemaCheckTestTrait;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
+use Drupal\entity_test\Entity\EntityTest;
+use Drupal\entity_test\Entity\EntityTestMul;
 use Drupal\KernelTests\Core\Entity\EntityKernelTestBase;
 
 /**
@@ -202,4 +204,84 @@ class DynamicEntityReferenceBaseFieldTest extends EntityKernelTestBase {
     }
   }
 
+  /**
+   * Tests the der field type for referencing multiple content entities.
+   */
+  public function testMultipleEntityReference() {
+    \Drupal::state()->set('dynamic_entity_reference_entity_test_cardinality', 1);
+    \Drupal::state()->set('dynamic_entity_reference_entity_test_exclude', '');
+    \Drupal::state()->set('dynamic_entity_reference_entity_test_with_two_base_fields', TRUE);
+    $this->enableModules(['dynamic_entity_reference_entity_test']);
+    \Drupal::entityDefinitionUpdateManager()->applyUpdates();
+    $this->installEntitySchema('entity_test_mul');
+
+    // Create some test entities which link each other.
+    $referenced_entity = EntityTest::create();
+    $referenced_entity->save();
+    $referenced_entity_mul = EntityTestMul::create();
+    $referenced_entity_mul->save();
+
+    $entity = EntityTest::create();
+    $entity->der[] = $entity->dynamic_references[] = $referenced_entity;
+    $entity->der[] = $entity->dynamic_references[] = $referenced_entity_mul;
+    $entity->save();
+
+    // Check references correctly for dynamic_references field.
+    $this->assertEquals($entity->dynamic_references[0]->target_id, $referenced_entity->id());
+    $this->assertEquals($entity->dynamic_references[0]->target_type, $referenced_entity->getEntityTypeId());
+    $this->assertEquals($entity->dynamic_references[0]->entity->getName(), $referenced_entity->getName());
+    $this->assertEquals($entity->dynamic_references[0]->entity->id(), $referenced_entity->id());
+    $this->assertEquals($entity->dynamic_references[0]->entity->uuid(), $referenced_entity->uuid());
+    // Check reference correctly.
+    $this->assertEquals($entity->dynamic_references[1]->target_id, $referenced_entity_mul->id());
+    $this->assertEquals($entity->dynamic_references[1]->target_type, $referenced_entity_mul->getEntityTypeId());
+    $this->assertEquals($entity->dynamic_references[1]->entity->getName(), $referenced_entity_mul->getName());
+    $this->assertEquals($entity->dynamic_references[1]->entity->id(), $referenced_entity_mul->id());
+    $this->assertEquals($entity->dynamic_references[1]->entity->uuid(), $referenced_entity_mul->uuid());
+
+    // Check references correctly for der field.
+    $this->assertEquals($entity->der[0]->target_id, $referenced_entity->id());
+    $this->assertEquals($entity->der[0]->target_type, $referenced_entity->getEntityTypeId());
+    $this->assertEquals($entity->der[0]->entity->getName(), $referenced_entity->getName());
+    $this->assertEquals($entity->der[0]->entity->id(), $referenced_entity->id());
+    $this->assertEquals($entity->der[0]->entity->uuid(), $referenced_entity->uuid());
+    // Check reference correctly.
+    $this->assertEquals($entity->der[1]->target_id, $referenced_entity_mul->id());
+    $this->assertEquals($entity->der[1]->target_type, $referenced_entity_mul->getEntityTypeId());
+    $this->assertEquals($entity->der[1]->entity->getName(), $referenced_entity_mul->getName());
+    $this->assertEquals($entity->der[1]->entity->id(), $referenced_entity_mul->id());
+    $this->assertEquals($entity->der[1]->entity->uuid(), $referenced_entity_mul->uuid());
+
+    $entity = EntityTestMul::create();
+    $entity->der[] = $entity->dynamic_references[] = $referenced_entity;
+    $entity->der[] = $entity->dynamic_references[] = $referenced_entity_mul;
+    $entity->save();
+
+    // Check references correctly for dynamic_references field.
+    $this->assertEquals($entity->dynamic_references[0]->target_id, $referenced_entity->id());
+    $this->assertEquals($entity->dynamic_references[0]->target_type, $referenced_entity->getEntityTypeId());
+    $this->assertEquals($entity->dynamic_references[0]->entity->getName(), $referenced_entity->getName());
+    $this->assertEquals($entity->dynamic_references[0]->entity->id(), $referenced_entity->id());
+    $this->assertEquals($entity->dynamic_references[0]->entity->uuid(), $referenced_entity->uuid());
+    // Check reference correctly.
+    $this->assertEquals($entity->dynamic_references[1]->target_id, $referenced_entity_mul->id());
+    $this->assertEquals($entity->dynamic_references[1]->target_type, $referenced_entity_mul->getEntityTypeId());
+    $this->assertEquals($entity->dynamic_references[1]->entity->getName(), $referenced_entity_mul->getName());
+    $this->assertEquals($entity->dynamic_references[1]->entity->id(), $referenced_entity_mul->id());
+    $this->assertEquals($entity->dynamic_references[1]->entity->uuid(), $referenced_entity_mul->uuid());
+
+    // Check references correctly for der field.
+    $this->assertEquals($entity->der[0]->target_id, $referenced_entity->id());
+    $this->assertEquals($entity->der[0]->target_type, $referenced_entity->getEntityTypeId());
+    $this->assertEquals($entity->der[0]->entity->getName(), $referenced_entity->getName());
+    $this->assertEquals($entity->der[0]->entity->id(), $referenced_entity->id());
+    $this->assertEquals($entity->der[0]->entity->uuid(), $referenced_entity->uuid());
+    // Check reference correctly.
+    $this->assertEquals($entity->der[1]->target_id, $referenced_entity_mul->id());
+    $this->assertEquals($entity->der[1]->target_type, $referenced_entity_mul->getEntityTypeId());
+    $this->assertEquals($entity->der[1]->entity->getName(), $referenced_entity_mul->getName());
+    $this->assertEquals($entity->der[1]->entity->id(), $referenced_entity_mul->id());
+    $this->assertEquals($entity->der[1]->entity->uuid(), $referenced_entity_mul->uuid());
+  }
+
 }