try updating vscode-test.mjs

Author: davidramnero

.vscode-test.mjs

@@ -2,4 +2,9 @@ import { defineConfig } from '@vscode/test-cli';
 
 export default defineConfig({
 	files: 'out/test/**/*.test.js',
-});
+
+	launchArgs: [
+		'--user-data-dir',
+		'/tmp/vscode-test'
+	]
+});