After the lunch meeting ended, Blaise retired to his compartment on the Hogwarts Express in which Draco Malfoy was lying down with his head on Pansy Parkinson's lap while she stroked his hair. Harry Potter followed Blaise back to this compartment under his Invisibility cloak in an attempt to hear Draco's conversation, and give him some perspective as to what Draco had been planning over the summer. Once they arrived at Hogwarts, Blaise apparently passed the litmus test that Slughorn had set, as he continued to receive invitations to Slughorn's parties after the school year began. He did not seem to have a high opinion of his fellow members, if his comments to Draco Malfoy on the train were any indication, but in spite of that, he continued to accept the invitations.