private function printOutput(): void
    {
        foreach ($this->db->query('SELECT id, file_name FROM tests WHERE completed = 1')->fetchAll() as $test) {
            $this->printer->printFeedback($this->pending[$test['file_name']]);
            $this->db->prepare('DELETE FROM tests WHERE id = :id')->execute([
                'id' => $test['id'],
            ]);
        }
    }