I cannot reproduce this.

Time: 2274ms Passed: 0Failed: 3Exit Code: 1

public class Finder {
    
    public static bool PathFinder(string maze) {
        if (maze == ".") return true;
        return false;
    }
}

The description is too vague about the possible input. It's definitely not ax + b = c, and sample tests come up with lots of nasty surprises as well.

Also, - -8 in sample tests? Is this even valid?

Could use tags: Regular Expressions, Parsing

Issue fixed.

huh.
I think the error is with the way I wrote my tests. Sorry about that! Will fix soon.