diff --git a/test/electron/renderer.js b/test/electron/renderer.js
index 5658b244719..63729010808 100644
--- a/test/electron/renderer.js
+++ b/test/electron/renderer.js
@@ -270,5 +270,5 @@ function runTests(opts) {
 
 ipcRenderer.on('run', (e, opts) => {
 	initLoader(opts);
-	runTests(opts).catch(err => console.error(err));
+	runTests(opts).catch(err => console.error(typeof err === 'string' ? err : JSON.stringify(err)));
 });