diff --git a/.travis.yml b/.travis.yml
index 8623517fbe0..d8ab5987c52 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,3 +18,5 @@ script:
   - npm test
   - npm run lint
   - npm run nsp
+notifications:
+  email: false
diff --git a/History.md b/History.md
index cfd80ff6aea..7df838a038a 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,8 @@
+4.12.6 / 2017-11-01
+===================
+ * fix(schema): make clone() copy query helpers correctly #5752
+ * fix: undeprecate `ensureIndex()` and use it by default #3280
+
 4.12.5 / 2017-10-29
 ===================
  * fix(query): correctly handle `$in` and required for $pull and update validators #5744
diff --git a/lib/drivers/node-mongodb-native/collection.js b/lib/drivers/node-mongodb-native/collection.js
index 6b190338c85..a5378a72e09 100644
--- a/lib/drivers/node-mongodb-native/collection.js
+++ b/lib/drivers/node-mongodb-native/collection.js
@@ -4,7 +4,6 @@
 
 var MongooseCollection = require('../../collection');
 var Collection = require('mongodb').Collection;
-var util = require('util');
 var utils = require('../../utils');
 
 /**
@@ -156,13 +155,6 @@ for (var i in Collection.prototype) {
   iter(i);
 }
 
-/*!
- * ignore
- */
-
-Collection.prototype.ensureIndex = util.deprecate(Collection.prototype.ensureIndex,
-  '`ensureIndex()` is deprecated in Mongoose >= 4.12.0, use `createIndex()` instead');
-
 /**
  * Debug print helper
  *
diff --git a/lib/model.js b/lib/model.js
index c6d5b28c083..ecf2ff52eee 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -936,7 +936,7 @@ Model.init = function init(callback) {
  *
  * ####Example:
  *
- *     Event.createIndexes(function (err) {
+ *     Event.ensureIndexes(function (err) {
  *       if (err) return handleError(err);
  *     });
  *
@@ -959,14 +959,14 @@ Model.init = function init(callback) {
  * @api public
  */
 
-Model.createIndexes = Model.ensureIndexes = function createIndexes(options, callback) {
+Model.ensureIndexes = function ensureIndexes(options, callback) {
   if (typeof options === 'function') {
     callback = options;
     options = null;
   }
 
   if (options && options.__noPromise) {
-    _createIndexes(this, options, callback);
+    _ensureIndexes(this, options, callback);
     return;
   }
 
@@ -977,7 +977,7 @@ Model.createIndexes = Model.ensureIndexes = function createIndexes(options, call
   var _this = this;
   var Promise = PromiseProvider.get();
   return new Promise.ES6(function(resolve, reject) {
-    _createIndexes(_this, options || {}, function(error) {
+    _ensureIndexes(_this, options || {}, function(error) {
       if (error) {
         callback && callback(error);
         reject(error);
@@ -988,8 +988,31 @@ Model.createIndexes = Model.ensureIndexes = function createIndexes(options, call
   });
 };
 
-function _createIndexes(model, options, callback) {
+/**
+ * Similar to `ensureIndexes()`, except for it uses the [`createIndex`](http://mongodb.github.io/node-mongodb-native/2.2/api/Collection.html#createIndex)
+ * function. The `ensureIndex()` function checks to see if an index with that
+ * name already exists, and, if not, does not attempt to create the index.
+ * `createIndex()` bypasses this check.
+ *
+ * @param {Object} [options] internal options
+ * @param {Function} [cb] optional callback
+ * @return {Promise}
+ * @api public
+ */
+
+Model.createIndexes = function createIndexes(options, callback) {
+  if (typeof options === 'function') {
+    callback = options;
+    options = {};
+  }
+  options = options || {};
+  options.createIndex = true;
+  return this.ensureIndexes(options, callback);
+};
+
+function _ensureIndexes(model, options, callback) {
   var indexes = model.schema.indexes();
+  options = options || {};
 
   var done = function(err) {
     if (err && model.schema.options.emitIndexErrors) {
@@ -1016,7 +1039,7 @@ function _createIndexes(model, options, callback) {
   };
 
   var create = function() {
-    if (options && options._automatic) {
+    if (options._automatic) {
       if (model.schema.options.autoIndex === false ||
           (model.schema.options.autoIndex == null && model.db.config.autoIndex === false)) {
         return done();
@@ -1031,7 +1054,8 @@ function _createIndexes(model, options, callback) {
     _handleSafe(options);
 
     indexSingleStart(indexFields, options);
-    model.collection.createIndex(indexFields, indexOptions, utils.tick(function(err, name) {
+    var methodName = options.createIndex ? 'createIndex' : 'ensureIndex';
+    model.collection[methodName](indexFields, indexOptions, utils.tick(function(err, name) {
       indexSingleDone(err, indexFields, indexOptions, name);
       if (err) {
         return done(err);