Error using VS Code insders on macOS runners

I am using the following configuration of .vscode-test.mjs which uses the insiders version.

import { defineConfig } from "@vscode/test-cli";

export default defineConfig({
  files: "out/test/**/*.test.js",
  version: "insiders",
  mocha: {
    retries: 5,
    parallel: false,
  },
});

I execute the tests in a macos-latest pipeline via vscode-test script. I also tried to execute the tests executing in a macos-15 pipeline to validate it is not a macOS problem.

In both pipelines I get the following output:

> vscode-test

- Resolving version...
✔ Validated version: insiders
- Found at https://update.code.visualstudio.com/latest/darwin-arm64/insider?released=true
✔ Found at https://update.code.visualstudio.com/latest/darwin-arm64/insider?released=true
- Downloading (299.92 MB)
✔ Downloaded VS Code (07b4ff1883f94da91f6d698744fc7c3638b59720) into /Users/runner/work/vscode-logging/vscode-logging/.vscode-test/vscode-darwin-arm64-insiders
Test error: Error: spawn /Users/runner/work/vscode-logging/vscode-logging/.vscode-test/vscode-darwin-arm64-insiders/Visual Studio Code - Insiders.app/Contents/MacOS/Electron ENOENT
Exit code:   -2
Error: Process completed with exit code 1.

This makes it impossible to execute any tests on macOS with the insiders version.

The stable version does currently work, but I don't know if this issue will roll over to the next stable.

Start with the .vscode-test.mjs configuration and the macOS pipeline that runs the vscode-test script. Reproduce the insiders download, then inspect the downloaded application path and the spawn failure shown in the logs. Done means the insiders version launches and the extension tests complete successfully on macOS runners.