Scrollbars in the Test console panel overlap

VS Code version:

```
Version: 1.136.1 (user setup)
Commit: a44adf7f53e00964ab890f9f8758a334f1fc15bc
Datum: 2026-09-03T05:06:41Z
Electron: 42.10.0
ElectronBuildId: 15109253
Chromium: 148.0.7778.280
Node.js: 24.18.1
V8: 14.8.178.38-electron.0
Betriebssystem: 1.0.81-0
```

OS Version: `Windows 10x64`

### Describe the bug

The scrollbars in the Test console panel overlap almost completely.

It's utterly hard if not impossible to scroll through the left panel:

Maybe the panel design doesn't adhere to user settings. Mine are like this:

```json
{
"editor.scrollbar": {
"vertical": "visible",
"horizontal": "visible",
"scrollByPage": true,
"verticalHasArrows": true,
"horizontalHasArrows": true
},
}
```

### Expected behavior

Scrollbars should not overlap.

### Reproduction

See this screencast:


---

I opened this issue in the Vitest repository first, but they think it's an issue related to VS Code:

https://github.com/vitest-dev/vscode/issues/814