This test is supposed to draw a JTree. I see on Linux two labels and two text fields in that tree.

However on Mac there's only an empty gray rectangle painted instead, as tall as one line of text.
I personally don't see in the test any reason for OS X to behave differently.
Please evaluate and decide on the priority.

I tried a PIT build for jdk9 b154 and b152 on different systems, 10.11 and 10.12, with the same effect.