diff --git a/lib/fork.js b/lib/fork.js
index b2b2405e6..8317774ff 100644
--- a/lib/fork.js
+++ b/lib/fork.js
@@ -60,7 +60,7 @@ const createWorker = (options, execArgv) => {
 	};
 };
 
-export default function loadFork(file, options, execArgv) {
+export default function loadFork(file, options, execArgv = process.execArgv) {
 	let finished = false;
 
 	const emitter = new Emittery();