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diff --git a/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/src-clear-cues.html b/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/src-clear-cues.html
new file mode 100644
index 0000000000..3ba8c9db88
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/src-clear-cues.html
@@ -0,0 +1,52 @@
+<!doctype html>
+<title>track element changing "track URL" and clearing cues</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id=log></div>
+<script>
+(async_test(document.title+', set mode, add cue, set src')).step(function(){
+    var track = document.createElement('track');
+    var c = new VTTCue(0, 1, 'foo');
+    c.id = 'id';
+    track.track.addCue(c);
+    assert_equals(track.track.cues, null, 'cues before setting src or mode');
+    track.track.mode = 'showing';
+    assert_equals(track.track.cues.length, 1, 'cues after setting mode');
+    var cues = track.track.cues;
+    track.src = 'data:,a';
+    assert_equals(track.track.cues.length, 0, 'cues.length after setting src');
+    assert_equals(track.track.cues, cues, 'track.track.cues sameness after setting src');
+    assert_equals(c.id, 'id', 'liveness of removed cue');
+    this.done();
+});
+
+(async_test(document.title+', set mode, set src, add cue, change src')).step(function(){
+    var track = document.createElement('track');
+    track.track.mode = 'showing';
+    track.src = 'data:,a';
+    var c = new VTTCue(0, 1, 'foo');
+    c.id = 'id';
+    track.track.addCue(c);
+    assert_equals(track.track.cues.length, 1, 'cues.length before changing src');
+    var cues = track.track.cues;
+    track.src = 'data:,b';
+    assert_equals(track.track.cues.length, 0, 'cues.length after changing src');
+    assert_equals(track.track.cues, cues, 'track.track.cues sameness after changing src');
+    assert_equals(c.id, 'id', 'liveness of removed cue');
+    this.done();
+});
+
+(async_test(document.title+', set mode, add cue, change mode to disabled, set src')).step(function(){
+    var track = document.createElement('track');
+    track.track.mode = 'showing';
+    var c = new VTTCue(0, 1, 'foo');
+    c.id = 'id';
+    track.track.addCue(c);
+    var cues = track.track.cues;
+    track.track.mode = 'disabled';
+    track.src = 'data:,a';
+    assert_equals(cues.length, 0, 'cues.length after changing src');
+    assert_equals(c.id, 'id', 'liveness of removed cue');
+    this.done();
+});
+</script>