Justin stared at Draco for a beat before answering. He didn't want to lie but he had hoped to avoid speaking to him about the broom until closer to the match. Not only did he not trust Draco to the extent he had taken it to a Professor to examine but he wasn't planning on using it himself at all. "Do you want the truth?"
He was well aware of Draco's troubles and if the Slytherin wanted to pretend that he had done nothing to earn Justin's distrust then he could play along but really what did he expect, especially now the rumours had been confirmed that Draco had indeed taken the Dark Mark a few years back.