diff --git a/snippets/bindKey.md b/snippets/bindKey.md
index 147ad2ff7..3ed5d7eea 100644
--- a/snippets/bindKey.md
+++ b/snippets/bindKey.md
@@ -3,13 +3,10 @@
 Creates a function that invokes the method at a given key of an object, optionally adding any additional supplied parameters to the beginning of the arguments.
 
 Return a `function` that uses `Function.apply()` to bind `context[fn]` to `context`.
-Use `Array.concat()` to prepend any additional supplied parameters to the arguments.
+Use spread operator to prepend any additional supplied parameters to the arguments.
 
 ```js
-const bindKey = (context, fn, ...args) =>
-  function() {
-    return context[fn].apply(context, args.concat(...arguments));
-  };
+const bindKey = (context, fn, ...boundArgs) => (...args) => context[fn].apply(context, [...boundArgs, ...args]);
 ```
 
 ```js
diff --git a/test/bindKey/bindKey.js b/test/bindKey/bindKey.js
index 9d43be087..9b538c735 100644
--- a/test/bindKey/bindKey.js
+++ b/test/bindKey/bindKey.js
@@ -1,5 +1,2 @@
-const bindKey = (context, fn, ...args) =>
-  function() {
-    return context[fn].apply(context, args.concat(...arguments));
-  };
+const bindKey = (context, fn, ...boundArgs) => (...args) => context[fn].apply(context, [...boundArgs, ...args]);
 module.exports = bindKey;