diff --git a/tests/QueryBuilderTest.php b/tests/QueryBuilderTest.php
index 2e8c3ea..d493469 100644
--- a/tests/QueryBuilderTest.php
+++ b/tests/QueryBuilderTest.php
@@ -665,7 +665,7 @@ public function testDefaultValues(): void
     }
 
     /** @dataProvider \Yiisoft\Db\Oracle\Tests\Provider\QueryBuilderProvider::selectScalar */
-    public function testSelectScalar(array|bool|float|int $columns, string $expected): void
+    public function testSelectScalar(array|bool|float|int|string $columns, string $expected): void
     {
         parent::testSelectScalar($columns, $expected);
     }