Vikings scored seven tries against the young Warrington side, taking a 10-0 with tries from Roberts and Matty Fleming.
More tries came from Kieran Dixon, two, Sam Wilde, two, and Matty Fozard.
Dixon also kicked six goals.
Widnes Vikings: Roby, Ince, Fleming, Roberts, Dixon, Lyons, Owens, Walker, Fozard, Wilson, Lloyd, Wilde, Gregson. Subs: Brooks, Johnstone, Bent, Butt, Tilleke, McCurrie Warrington Wolves: Taylor-Wray, Thewlis, Bardsley-Rowe, Lindop, Russell, Whitehead, Hayes, Dudson, Dwyer, Thomas, Holroyd, Tupaea, Wood. Subs: Gardner, Green, Hartill, Sergent, Marshall, McKinney, Irwin, Raughter.
Tries: Whitehead 2, Wood 2, Taylor-Wray 2, Thomas, Dwyer.
