diff --git a/ydb/tests/fq/yds/test_row_dispatcher.py b/ydb/tests/fq/yds/test_row_dispatcher.py
index e1f33385b088..9dbe9603582d 100644
--- a/ydb/tests/fq/yds/test_row_dispatcher.py
+++ b/ydb/tests/fq/yds/test_row_dispatcher.py
@@ -388,7 +388,7 @@ def test_filters_optional_field(self, kikimr, client):
         filter = ' nested REGEXP ".*abc.*"'
         self.run_and_check(kikimr, client, sql + filter, data, expected, 'predicate: WHERE (IF((`nested` IS NOT NULL), CAST(`nested` AS String), NULL) REGEXP \\".*abc.*\\")')
         filter = ' CAST(nested AS String) REGEXP ".*abc.*"'
-        self.run_and_check(kikimr, client, sql + filter, data, expected, 'predicate: WHERE (CAST(`nested` AS Optional<String>) REGEXP \\".*abc.*\\")')
+        self.run_and_check(kikimr, client, sql + filter, data, expected, 'predicate: WHERE (CAST(`nested` AS String?) REGEXP \\".*abc.*\\")')
 
     @yq_v1
     def test_filter_missing_fields(self, kikimr, client):