diff --git a/tests/unit/slider/slider_common.js b/tests/unit/slider/slider_common.js
index 48fd5e457..6d7278de6 100644
--- a/tests/unit/slider/slider_common.js
+++ b/tests/unit/slider/slider_common.js
@@ -14,6 +14,10 @@ TestHelpers.commonWidgetTests( "slider", {
 		values: null,
 
 		// callbacks
-		create: null
+		create: null,
+		change: null,
+		slide: null,
+		start: null,
+		stop: null
 	}
 });
diff --git a/ui/jquery.ui.slider.js b/ui/jquery.ui.slider.js
index 712c6853d..46c8a83ae 100644
--- a/ui/jquery.ui.slider.js
+++ b/ui/jquery.ui.slider.js
@@ -32,7 +32,13 @@ $.widget( "ui.slider", $.ui.mouse, {
 		range: false,
 		step: 1,
 		value: 0,
-		values: null
+		values: null,
+
+		// callbacks
+		change: null,
+		slide: null,
+		start: null,
+		stop: null
 	},
 
 	_create: function() {