Nathan Doyle's double and a Will Atkinson strike helped the Bantams end their six-game winless streak - something Parkinson felt needed to be put right after some luckless performances.
And even with the luxury of resting Capital One Cup heroes James Hanson and Nahki Wells, Parkinson was encouraged by the determination shown by his squad. With the league's bottom side AFC Wimbledon the last game before the showpiece at Wembley, Parkinson sees no better preparation than another three points.
"I am absolutely delighted. We needed that win because results haven't gone our way, certainly in the last two games we've deserved more than we've got," said Parkinson. "This was a resilient performance against a good team. Wycombe are probably the form team in the division and we knew it was going to be tough.
"The lads deserved it and they earned it through sheer honesty and hard work but with a lot of quality as well and it was important we got back to winning ways.
"We have got a big cup final at the end of the month as we all know but I wanted to go into that with more points on the board because I think this team deserves to be in a better position."
Beaten for the first time since New Year's Day, Wycombe boss Gareth Ainsworth insists his players will not lose any confidence considering their revival this season. Although disappointed to concede so early from a set-piece, Ainsworth vowed to rectify such mistakes on the training pitch and has faith his side will respond against Bristol Rovers.
"I've always said we're not going to win every game and sometimes you take positives out of defeat and this has brought us down to earth and made sure we will be on it at the weekend," said Ainsworth.
"We were done by a set-play in the first minute and I thought after that we were chasing the game and it's really important to defend early on and not let a team get a lead.
"I told the lads don't be down because we've been on a great run and what they have achieved in the last two and half months, from 24th to 12th in the league, is something to be proud of. The last time we got a hammering the lads responded really well and I still believe we can beat anyone."