diff --git src/wp-includes/js/wp-api.js src/wp-includes/js/wp-api.js
index 856aa4c8b5..8d4123c176 100644
--- src/wp-includes/js/wp-api.js
+++ src/wp-includes/js/wp-api.js
@@ -809,7 +809,7 @@
* @returns {*}.
*/
sync: function( method, model, options ) {
- var beforeSend;
+ var beforeSend, toReturn, storedAjax;
options = options || {};
@@ -852,7 +852,11 @@
if ( this.requireForceForDelete && 'delete' === method ) {
model.url = model.url() + '?force=true';
}
- return Backbone.sync( method, model, options );
+ storedAjax = Backbone.ajax;
+ Backbone.ajax = wp.apiRequest.transport;
+ toReturn = Backbone.sync( method, model, options );
+ Backbone.ajax = storedAjax;
+ return toReturn;
},
/**
diff --git tests/qunit/fixtures/wp-api.js tests/qunit/fixtures/wp-api.js
index 04c9dd1823..5dc8062c85 100644
--- tests/qunit/fixtures/wp-api.js
+++ tests/qunit/fixtures/wp-api.js
@@ -36,7 +36,7 @@ var pathToData = {
*
* @return {Object} A jQuery deferred object that resolves with the mapped data.
*/
-Backbone.ajax = function ( param ) {
+wp.apiRequest.transport = Backbone.ajax = function ( param ) {
var data,
request = param.url
diff --git tests/qunit/index.html tests/qunit/index.html
index 5ed4c7a02d..46037d2e2b 100644
--- tests/qunit/index.html
+++ tests/qunit/index.html
@@ -62,6 +62,8 @@
+
+
@@ -79,7 +81,6 @@
-