diff --git a/src/core/observer/array.js b/src/core/observer/array.js
index 0dea252e3cb..1d22870a9c6 100644
--- a/src/core/observer/array.js
+++ b/src/core/observer/array.js
@@ -29,8 +29,6 @@ export const arrayMethods = Object.create(arrayProto)
     let inserted
     switch (method) {
       case 'push':
-        inserted = args
-        break
       case 'unshift':
         inserted = args
         break