Robinson (ankle) didn't practice Wednesday, Teresa Varley of the Steelers' official site reports.
Head coach Mike Tomlin previously noted that Robinson might be limited during the early portions of the week, so the wideout's absence from practice Wednesday wasn't entirely surprising. Robinson now has two more chances to return to the practice field ahead of Sunday's game against the Texans. He'll presumably need to practice fully by Friday in order to avoid heading into the weekend with an injury designation.