Fix type error in integration tests
Fix type error in integration tests

mrkkrp/stack,martin-kolinek/stack,deech/stack,MichielDerhaeg/stack,deech/stack,juhp/stack,anton-dessiatov/stack,Fuuzetsu/stack,Fuuzetsu/stack,martin-kolinek/stack,MichielDerhaeg/stack,AndreasPK/stack,AndreasPK/stack,mrkkrp/stack,anton-dessiatov/stack,juhp/stack