West Coast might be up and about following a run of three wins, but senior coach Adam Simpson says Sunday’s clash with Collingwood will be the biggest test his charges have faced so far this year.

The Eagles reignited their season with convincing wins against Sydney, Adelaide and Fremantle, but they are yet to knock off a top eight team in 2020.

They get an opportunity to do that this weekend against the Magpies, who are placed third on the AFL ladder following seven rounds of a topsy turvy home and away campaign.

Simpson expected his side to know exactly where they stood after their bout with the Pies.

"We had to play a lot better than we did in the Port Adelaide game and I think we've gradually improved and we're building towards hopefully a sustainable brand that stands up against anyone,” Simpson said.

"The way we've gone about it the last three weeks has been pleasing for me. Sometimes you win games based on talent or experience, but I think our system has evolved with the season and it will get tested fully this week.

“Collingwood have been playing a pretty strong brand from the beginning of the year and it hasn’t really changed for two or three years. We’d like to think we’re not too far away, but we’ll find out this week definitely with the way Collingwood play, with how physical and contested the game will be and how we they are at defending.

“There are challenges in front of us, but the boys are ready.”

As Simpson noted, Collingwood’s defence has been water in 2020.

In fact, the Magpies’ back six have only given up 25 goals for the year, making them the stingiest defence in the league by quite some margin.

The next best club is Essendon, who have conceded 32 goals, while West Coast (ranked ninth) has leaked 39 majors through the first seven fixtures of the season.

While the Magpies’ team defence has been firing on all cylinders, a big part of their success can be credited to the form of Darcy Moore, who currently ranks 10^th in the competition for total intercepts and 15^th for total one percenters.

Simpson admitted he was yet to decide if he would send an Eagle to Moore this Sunday.

“We traditionally haven’t used those tactics against rebounding or intercept defenders,” he said.

“It’s give to get too though, because you sacrifice a bit of structure and system to try and take out a defender.

“But a lot of teams have done it against us in the past. It’s probably a 50-50 most weeks; there’s always a bit of a role on (Jeremy) McGovern. Collingwood have traditionally done things down in their forward line with our backmen, so we are anticipating that might happen for us.

“Whether we do it or not, we’ll work through that.”