In the Bantams' penultimate home league game of the season, visitors Bristol City will go into the Valley Parade encounter knowing a win over Parkinson's men will seal their promotion up into the Championship.
With City looking to do everything they can to keep their ambitions of an end-of-season Play-Off spot alive though, Parkinson is confident his side can give the table-toppers a good game.
Parkinson said: "This Tuesday is a terrific game for us against the side top of the league.
"It is a good test for us. If we show the same attitude and effort as we did at Gillingham, which I am sure we will, then we'll give ourselves a good chance.
"We had a good 2-2 draw down at their place earlier in the season and played very well.
"You have to give (Bristol City manager) Steve Cotterill and his players and staff enormous credit for the success they have had during the course of this season.
"We will be going all out on Tuesday night, however, to try and keep our own season going.
"We will continue to give everything until the final whistle of the last match of the season."