Pompey beat Shrewsbury to move another step closer to promotion from League One.
The 3-1 victory at Fratton Park means beating Bolton on the road next Saturday would be enough to secure a spot in the Championship.
An early Chey Dunkley own-goal gave John Mousinho's men the lead, only for the Shrews to hit back through Jordan Shipley.
But Colby Bishop restored the lead from the penalty spot after Kusini Yengi was tripped, then swept home his 20th strike of the season to secure the points for the Blues.
