diff --git a/testing/web-platform/tests/media-source/mediasource-redundant-seek.html b/testing/web-platform/tests/media-source/mediasource-redundant-seek.html
index 16dc9a98b42..c1cc84c3096 100644
--- a/testing/web-platform/tests/media-source/mediasource-redundant-seek.html
+++ b/testing/web-platform/tests/media-source/mediasource-redundant-seek.html
@@ -2,6 +2,7 @@
 <html>
     <head>
         <title>Test MediaSource behavior when receiving multiple seek requests during a pending seek.</title>
+        <meta name="timeout" content="long">
         <script src="/resources/testharness.js"></script>
         <script src="/resources/testharnessreport.js"></script>
         <script src="mediasource-util.js"></script>
