McDonald's is testing a vegan burger - and some customers are calling it the 'best vegetarian burger' they've ever had

On Thursday, news broke that rocked the fast-food landscape: McDonald's is testing a vegan burger. 

The test is a small one. The "McVegan" will only be sold at McDonald's in Tampere, Finland, Today reported. And, the burger will only be on sale from October 4 through November 21.

However, even a limited vegan test from the fast-food giant is earth-shattering news for fans of both plant-based food and fast food. 

Some people in Finland have already taken McDonald's up on its vegan offer - and posted photos on social media. 

So far, early reviews seem pretty positive. 

"After boycotting McDonald's for 20+ years I had to try the new #mcvegan," one person wrote on Instagram, calling the burger "really good." 

"Quite good to my taste," wrote another person who had picked up the McVegan in Tampere.

"The patty tastes like the Anamma patties that I don't like that much, so it could be better, but along the great other ingredients they make it the best fast food vegetarian burger that I've had."

 The McVegan is also causing a major stir far outside of Finland. 

While a few people were skeptical, most vegetarians and vegans seemed excited that McDonald's is testing the burger - even if it's a small test. 

While a vegan Big Mac is likely a long way off, the fast-food industry has become increasingly attuned to the needs of vegetarian and vegan customers. Taco Bell specifically has led to way, rolling out a American Vegetarian Association-certified menu in 2015.