diff --git a/test/function/samples/options-hook/_config.js b/test/function/samples/options-hook/_config.js
index 230a403ca1d..d3d518f1900 100644
--- a/test/function/samples/options-hook/_config.js
+++ b/test/function/samples/options-hook/_config.js
@@ -15,7 +15,7 @@ module.exports = {
 						preserveParens: false,
 						sourceType: 'module'
 					},
-					acornInjectPlugins: [null, null, null],
+					acornInjectPlugins: [null, null, null, null],
 					context: 'undefined',
 					experimentalCacheExpiry: 10,
 					inlineDynamicImports: false,