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diff --git a/testing/web-platform/tests/largest-contentful-paint/image-inside-svg.html b/testing/web-platform/tests/largest-contentful-paint/image-inside-svg.html
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+++ b/testing/web-platform/tests/largest-contentful-paint/image-inside-svg.html
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+<!DOCTYPE HTML>
+<meta charset=utf-8>
+<title>Largest Contentful Paint: observe image inside SVG</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/largest-contentful-paint-helpers.js"></script>
+<script>
+setup({"hide_test_state": true});
+async_test(function (t) {
+ assert_implements(window.LargestContentfulPaint, "LargestContentfulPaint is not implemented");
+ const beforeLoad = performance.now();
+ new PerformanceObserver(
+ t.step_func_done(entryList => {
+ assert_equals(entryList.getEntries().length, 1);
+ const entry = entryList.getEntries()[0];
+ const url = window.location.origin + '/images/blue.png';
+ // blue.png is 133 by 106.
+ const size = 133 * 106;
+ checkImage(entry, url, 'image_id', size, beforeLoad);
+ })
+ ).observe({type: 'largest-contentful-paint', buffered: true});
+}, "Image inside SVG is observable.");
+</script>
+<svg width="300" height="300" id='svg_id'>
+ <image href='/images/blue.png' id='image_id'/>
+</svg>