A midweek victory at Oxford saw Pompey beat one of League One’s form clubs on their own patch.
But Kenny Jackett is not interested in positive results in isolation and is looking for his side to now put a winning run together.
Their promotion hopes will be put to the test when Gillingham make the trip to Fratton Park this weekend.
And Jackett knows Pompey have to improve their form on the south coast if they are to trouble the top two.
The Blues boss said: “Gillingham are a very competitive side, with an experienced manager and if we have to be at our best against them.
“But we should be buoyed by the result on Tuesday night and now there’s a determination to build on that.
“Our home record this season hasn’t been as good as we’ve wanted, so that’s something we’re looking to rectify.
“I can’t really put my finger on why it’s been like that and you’ve got to do everything you can to improve.
"We should be buoyed by the result on Tuesday night and now there’s a determination to build on that."
“This is always a really competitive division and it’s hard to pick up points, so we have to make sure we get our performance right.
“We’re fourth in the table, but things can change very quickly. We have to apply pressure on the sides above us and I do think any of the three promotion places are still open.”
Jackett is expecting to be back in the technical area on Saturday after an operation on his arm forced him to take a back seat for the past few games.
He said: “The operation was done last Thursday, but I’ve recovered from that and am now feeling okay.
“There were a lot of encouraging messages that I’ve received. It’s great to see and something that’s very much appreciated by myself and my family.
“It was frustrating to have to watch the Bristol Rovers game on iFollow when I was self-isolating, but I’ve been able to see the other two games live from the ground, which has helped.”
James Bolton is still sidelined for Pompey, but Alex Bass and Michael Jacobs are nearing a return to full fitness.