diff --git a/src/module-elasticsuite-thesaurus/Test/Unit/Model/IndexTest.php b/src/module-elasticsuite-thesaurus/Test/Unit/Model/IndexTest.php
index 6c7f408b5..f1dc49ea1 100644
--- a/src/module-elasticsuite-thesaurus/Test/Unit/Model/IndexTest.php
+++ b/src/module-elasticsuite-thesaurus/Test/Unit/Model/IndexTest.php
@@ -15,7 +15,7 @@
 
 namespace Smile\ElasticsuiteThesaurus\Test\Unit\Model;
 
-use Elasticsearch\Common\Exceptions\BadRequest400Exception;
+use OpenSearch\Common\Exceptions\BadRequest400Exception;
 use PHPUnit\Framework\MockObject\MockObject;
 use Smile\ElasticsuiteCore\Api\Client\ClientInterface;
 use Smile\ElasticsuiteCore\Api\Search\Request\ContainerConfigurationInterface;