diff --git a/test/focus.tsx b/test/focus.tsx
index e3b581a5f..91f5b5dae 100644
--- a/test/focus.tsx
+++ b/test/focus.tsx
@@ -13,6 +13,7 @@ const createStdin = () => {
 	stdin.setRawMode = spy();
 	stdin.setEncoding = () => {};
 	stdin.read = stub();
+	stdin.unref = () => {};
 
 	return stdin;
 };