diff --git a/tests/qunit/ext.uls.tests.js b/tests/qunit/ext.uls.tests.js
index 5bfddb27..c3733a0f 100644
--- a/tests/qunit/ext.uls.tests.js
+++ b/tests/qunit/ext.uls.tests.js
@@ -35,4 +35,37 @@
 		// its direction cannot be acquired using the langdb utils.
 		strictEqual( $.uls.data.getDir( 'als' ), 'ltr', 'The direction of custom MW language als is ltr.' );
 	} );
+
+	test( '-- User preferences', function () {
+		expect( 2 );
+
+		// 'gofanim' means "fonts" in Hebrew.
+		// Here it's used as a meaningless word, to test
+		// the preferences without changing anything useful.
+		var prefName = 'gofanim',
+			prefs = mw.uls.preferences(),
+			prefsToSave = {},
+			readPrefs;
+
+		prefsToSave[prefName] = {
+			'fonts': {
+				'qqy': 'Megafont'
+			},
+			'webfonts-enabled': true
+		};
+
+		prefs.set( prefName, prefsToSave );
+		stop();
+		prefs.save( function ( successSave ) {
+			start();
+			ok( successSave, 'Options saving API did not produce an error.' );
+		} );
+
+		readPrefs = prefs.get( prefName );
+		strictEqual( readPrefs[prefName].fonts.qqy, 'Megafont', 'Correct value for the font name' );
+
+		// Delete old options
+		prefs.set( prefName, undefined );
+		prefs.save();
+	} );
 }( jQuery ) );