Coach Daryl Gibson's rookies left him with more questions than answers following the Waratahs' 40-35 Super Rugby trial loss to the Highlanders in Queenstown on Friday.
Both teams scored five tries apiece, with All Blacks midfielder Malakai Fekitoa running in three for the home team.
Gibson gave a number of Waratahs newcomers the chance to stake their claim for the season ahead.
Lock Sam Lousi, formerly of the Warriors in the NRL, was one who shone, while former
All Black Zac Guildford made the most of his opportunities with a try in the second half.