--- a/testing/web-platform/tests/media-source/mediasource-play-then-seek-back.html
+++ b/testing/web-platform/tests/media-source/mediasource-play-then-seek-back.html
@@ -25,28 +25,28 @@
                     {
                         assert_greater_than(mediaElement.currentTime, 0.0, 'Playback has started after seek.');
                         test.done();
                     });
                 }
 
                 function finishSeekThenPlay()
                 {
-                    assert_true(mediaElement.seeking, 'mediaElement is seeking');
                     assert_equals(mediaElement.currentTime, 0.0, 'Current time is 0.0');
                     test.expectEvent(mediaElement, 'seeked', 'mediaElement finished seek');
 
                     test.waitForExpectedEvents(confirmPlayThenEnd);
                 }
 
                 function delayedPlayHandler()
                 {
                     assert_greater_than(mediaElement.currentTime, 0.0, 'Playback has started.');
                     test.expectEvent(mediaElement, 'seeking', 'mediaElement');
                     mediaElement.currentTime = 0.0;
+                    assert_true(mediaElement.seeking, 'mediaElement is seeking');
 
                     test.waitForExpectedEvents(finishSeekThenPlay);
                 }
 
                 test.waitForExpectedEvents(function()
                 {
                     test.waitForCurrentTimeChange(mediaElement, delayedPlayHandler);
                 });