The feature `"testExplorer.gutterDecoration"` seems not working anymore

[diogo-rossi]

VS Code now has a native Test Explorer UI. But I prefer to use this extension instead.

The native setting "testing.gutterEnabled" is ok. I disabled it to use the "testExplorer.gutterDecoration" instead.

But the "testExplorer.gutterDecoration": true seems not working: nothing is showing on the gutter.