diff --git a/integrations/opensearch/tests/test_document_store.py b/integrations/opensearch/tests/test_document_store.py
index 51fc23a6e..4b7e242f2 100644
--- a/integrations/opensearch/tests/test_document_store.py
+++ b/integrations/opensearch/tests/test_document_store.py
@@ -202,7 +202,7 @@ def test_write_documents(self, document_store: OpenSearchDocumentStore):
 
     def test_write_documents_readonly(self, document_store_readonly: OpenSearchDocumentStore):
         docs = [Document(id="1")]
-        with pytest.raises(DocumentStoreError, match="no such index"):
+        with pytest.raises(DocumentStoreError, match="index_not_found_exception"):
             document_store_readonly.write_documents(docs)
 
     def test_create_index(self, document_store_readonly: OpenSearchDocumentStore):