diff --git a/tests/Models/WikiDocMapperTest.php b/tests/Models/WikiDocMapperTest.php
index 047efab..6749bc1 100755
--- a/tests/Models/WikiDocMapperTest.php
+++ b/tests/Models/WikiDocMapperTest.php
@@ -14,6 +14,7 @@ declare(strict_types=1);
 
 namespace Modules\Knowledgebase\tests\Models;
 
+use Modules\Admin\Models\NullAccount;
 use Modules\Knowledgebase\Models\NullWikiCategory;
 use Modules\Knowledgebase\Models\WikiDoc;
 use Modules\Knowledgebase\Models\WikiDocMapper;
@@ -41,6 +42,7 @@ final class WikiDocMapperTest extends \PHPUnit\Framework\TestCase
         $doc->setStatus(WikiStatus::DRAFT);
         $doc->category = new NullWikiCategory(1);
         $doc->setLanguage('en');
+        $doc->createdBy = new NullAccount(1);
 
         $id = WikiDocMapper::create()->execute($doc);
         self::assertGreaterThan(0, $doc->getId());
diff --git a/tests/Models/WikiDocTest.php b/tests/Models/WikiDocTest.php
index 648ef5c..9e223ea 100755
--- a/tests/Models/WikiDocTest.php
+++ b/tests/Models/WikiDocTest.php
@@ -180,6 +180,8 @@ final class WikiDocTest extends \PHPUnit\Framework\TestCase
                 'language'   => ISO639x1Enum::_EN,
                 'tags'       => [],
                 'media'      => [],
+                'createdAt'  => $this->doc->createdAt,
+                'createdBy'  => $this->doc->createdBy,
             ],
             $serialized
         );