You are correct. [-4, 5.6, -9.8, 3.14, 42, 6, 8.34] would give the same result and pass the test. It appears that there is no confirmation that squared integers were positive.
You could open a github issue for this so the developers could fix it.
https://forum.freecodecamp.org/t/creating-a-new-github-issue/18392
A casual search didn’t reveal any current issues open on the specific topic. You may want to search more carefully than I before opening a new issue though.