diff --git a/types/knex/knex-tests.ts b/types/knex/knex-tests.ts
index 3aaefb6909..4391b49304 100644
--- a/types/knex/knex-tests.ts
+++ b/types/knex/knex-tests.ts
@@ -185,6 +185,10 @@ knex('users').where(() => {
 
 knex('users').where('votes', '>', 100);
 
+// Let null be used in a two or 3 parameter where filter
+knex('users').where('votes', null);
+knex('users').where('votes', 'is not', null);
+
 var subquery = knex('users').where('votes', '>', 100).andWhere('status', 'active').orWhere('name', 'John').select('id');
 knex('accounts').where('id', 'in', subquery);