diff --git a/lib/chai/core/assertions.js b/lib/chai/core/assertions.js
index 42d88d273..469a614c6 100644
--- a/lib/chai/core/assertions.js
+++ b/lib/chai/core/assertions.js
@@ -170,6 +170,8 @@ module.exports = function (chai, _) {
    *
    * @name include
    * @alias contain
+   * @alias includes
+   * @alias contains
    * @param {Object|String|Number} obj
    * @param {String} message _optional_
    * @api public
@@ -209,6 +211,8 @@ module.exports = function (chai, _) {
 
   Assertion.addChainableMethod('include', include, includeChainingBehavior);
   Assertion.addChainableMethod('contain', include, includeChainingBehavior);
+  Assertion.addChainableMethod('contains', include, includeChainingBehavior);
+  Assertion.addChainableMethod('includes', include, includeChainingBehavior);
 
   /**
    * ### .ok