diff --git a/tests/Provider/QueryBuilderProvider.php b/tests/Provider/QueryBuilderProvider.php
index 1a007ecc..92fc755e 100644
--- a/tests/Provider/QueryBuilderProvider.php
+++ b/tests/Provider/QueryBuilderProvider.php
@@ -287,6 +287,7 @@ public static function buildColumnDefinition(): array
         $values["check('value > 5')"][0] = 'integer CHECK (`col_59` > 5)';
         $values["comment('comment')"][0] = 'varchar(255) /* comment */';
         $values['integer()->primaryKey()'][0] = 'integer PRIMARY KEY NOT NULL';
+        $values['string()->primaryKey()'][0] = 'varchar(255) PRIMARY KEY NOT NULL';
         $values['unsigned()'][0] = 'integer';
 
         return $values;