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I have the same issue, is there a way to overcome

No problem :).

There is a bug in your code. I improved the test feedback to give more of an idea why the solution can fail. Try again and hopefully the feedback will be useful!

That's odd, can you post how you build the board in a spoiler comment? I don't see anything that stands out in the tests that should be marking that as incorrect.

I have the same problem, it happens in JavaScript.
It's exactly the same string.

Expected: □ ■ □ ■ ■ □ ■ □ □ ■ □ ■ ■ □ ■ □, instead got: □ ■ □ ■ ■ □ ■ □ □ ■ □ ■ ■ □ ■ □

Have you checked that you're not including extra whitespace?

Same here

+1. Same problem. No a whitespace at the end. Checked error message in sublime and received equal values.

I've the same problem and I don't understand what Digikid13's solution to it is. Andddddd I had a whitespace at the end of my answer.

I have same problem...

I figured it out, the error isn't printing the correct stuff information, console log out your response and compare that to what is given in the test case below.

This is a problem with the testing stuff.

Same here. However, when I hard copy the expected output into the return command, it passes the test case. Has anybody been able to solve this?

Yup I got the same thing...