McDonald's on Thursday announced plans to test a plant-based burger using Beyond Meat patties in Canada.

The 12-week test will start Sept. 30 at 28 restaurants in Southwestern Ontario.

The item will appear on those menus as the P.L.T, which stands for plant, lettuce and tomato. The burger will sell for 6.49 Canadian dollars ($4.90), plus tax.

"This test allows us to learn more about real-world implications of serving the P.L.T., including customer demand and impact on restaurant operations," Ann Wahlgren, McDonald's vice president of global menu strategy, said in a statement.

Shares of Beyond Meat closed up 11% Thursday, while McDonald's shares were flat. Since its May initial public offering, Beyond's stock has surged 517%. However, in the last two months, the shares have tumbled 34% after a secondary stock offering, increased competition from Big Food rivals and concerns about its valuation.

Meat substitutes from Beyond Meat and Impossible Foods have soared in popularity this year, as more U.S. restaurant chains, like Dunkin' and Red Robin, add them to their menus. Burger King, which is owned by Restaurant Brands International, recently launched a version of its Whopper made with the Impossible burger nationwide.