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diff --git a/tests/qunit/suites/resources/jquery/jquery.hidpi.test.js b/tests/qunit/suites/resources/jquery/jquery.hidpi.test.js
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+++ b/tests/qunit/suites/resources/jquery/jquery.hidpi.test.js
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+( function ( $ ) {
+ QUnit.module( 'jquery.hidpi', QUnit.newMwEnvironment() );
+
+ QUnit.test( 'devicePixelRatio', 1, function ( assert ) {
+ var devicePixelRatio = $.devicePixelRatio();
+ assert.equal( typeof devicePixelRatio, 'number', '$.devicePixelRatio() returns a number' );
+ } );
+
+ QUnit.test( 'matchSrcSet', 6, function ( assert ) {
+ var srcset = 'onefive.png 1.5x, two.png 2x';
+
+ // Nice exact matches
+ assert.equal( $.matchSrcSet( 1, srcset ), null, '1.0 gives no match' );
+ assert.equal( $.matchSrcSet( 1.5, srcset ), 'onefive.png', '1.5 gives match' );
+ assert.equal( $.matchSrcSet( 2, srcset ), 'two.png', '2 gives match' );
+
+ // Non-exact matches; should return the next-biggest specified
+ assert.equal( $.matchSrcSet( 1.25, srcset ), null, '1.25 gives no match' );
+ assert.equal( $.matchSrcSet( 1.75, srcset ), 'onefive.png', '1.75 gives match to 1.5' );
+ assert.equal( $.matchSrcSet( 2.25, srcset ), 'two.png', '2.25 gives match to 2' );
+ } );
+}( jQuery ) );