The manager is expecting a searching test at the Macron Stadium when Millwall come up against a Bolton side desperate to pull clear of The Championship's lower reaches.
The Trotters are two points off the drop zone and will come up against a Lions side unbeaten in 15 League outings.
"We will go up there and be ourselves and look to impose ourselves on the game," Harris told millwallfc.co.uk.
"Our style is that we are patient, patient, and then we explode. Bolton will pose a slightly different challenge to what Bristol City did last weekend but they will have a right go at us.
"They are a team near the bottom of the table but they have some good players, a good squad, a massive squad of players. It will be a difficult one, they all are at this level.
"It's important that at we continue to amass as many points as we can because we don't know what the points total needed to get into the Play-Offs will be, but with five games to go we are edging closer, that much I do know.
"Tuesday night at Bolton is another chance to pick up more points."