diff --git a/test/unit/electron/index.js b/test/unit/electron/index.js
index 3991d0a0bd0..2e7e6442c72 100644
--- a/test/unit/electron/index.js
+++ b/test/unit/electron/index.js
@@ -146,6 +146,9 @@ app.on('ready', () => {
 		};
 	});
 
+	// No-op since invoke the IPC as part of IIFE in the preload.
+	ipcMain.handle('vscode:fetchShellEnv', event => { });
+
 	const win = new BrowserWindow({
 		height: 600,
 		width: 800,
@@ -154,6 +157,7 @@ app.on('ready', () => {
 			preload: path.join(__dirname, '..', '..', '..', 'src', 'vs', 'base', 'parts', 'sandbox', 'electron-browser', 'preload.js'), // ensure similar environment as VSCode as tests may depend on this
 			additionalArguments: [`--vscode-window-config=vscode:test-vscode-window-config`],
 			nodeIntegration: true,
+			contextIsolation: false,
 			enableWebSQL: false,
 			enableRemoteModule: false,
 			spellcheck: false,