Casting the tracking spell on Antonin's pajamas was deceptively simple. Part of Hermione struggled to believe that anything could be that easy. What if it was a trap, another betrayal? She knew she wouldn't feel confident in her ability to track until she laid eyes on Antonin. Focusing on the pajamas that were glowing blue as Draco showed her they should, she Disapparated away from the building, worried that she was going to fail.