Unit tests not compiling - Swift Xcode 9.2

I am learning some TDD for Swift and I came across an issue that Xcode wont compile my test code. I have no clue what could be wrong with this.

Other tests are working fine (also tests for "ListItem" and "Location"). I also closed Xcode many times and cleared Derived Data and even the project itself.

Below the screenshots of code and compile error. If I change the "ListItem" parameter in the method to "Any" (and change the type of the array also), it is compiling. But this is not the code I want without the specific type.

Thanks!