clion swift testing internal classes?

It seems I am either missing something massively important or testing swift in CLion is broken - which sadly makes it unusable for me.  Here's my latest problem that I am hoping someone with some expertise can help me fix.  The problem is that @testable doesn't seem to work.  This time I created a new project and wrote the minimum code I could.

I created a swift project and added a class with a static property.  Then I added a test to the generated tests.  In the test I do an XCTAssertTrue to check the value of the property.  From what I can tell from Apple's documentation I need to import the new class using @testable so the tests can access it. What happens is CLion gives me an error saying I have undefined symbols.

Any suggestions on how to get the basics of swift unit testing working in CLion is greatly appreciated.