Both sides are playing down the influence of minor parties as the election campaign enters its final day.

Government frontbencher Christopher Pyne, whose Adelaide seat was thought to be under threat from independent Nick Xenophon, says what people say in polls and how they vote are often different.

"I am not sure necessarily that the minor parties and the independents will do as well as the polls are indicating," he told Nine Network on Friday.

Labor frontbencher Anthony Albanese agrees, saying voters are often just sending a message through the polls.

"It doesn't mean that is the way they vote," he said.

"I think when people get in the poll booth they know they can have Bill Shorten or Malcolm Turnbull tomorrow night as prime minister."

However, he did concede a predicted 25 per cent minor party vote made Saturday's election both exciting and unpredictable.