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diff --git a/testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-026.html b/testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-026.html
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+++ b/testing/web-platform/tests/css/css-contain/content-visibility/content-visibility-026.html
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+<!doctype HTML>
+<html>
+<meta charset="utf8">
+<title>Content Visibility: Computed Values</title>
+<link rel="author" title="Rakina Zata Amni" href="mailto:rakina@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
+<meta name="assert" content="content-visibility:hidden does not affect computed value of 'contain'">
+<meta name="assert" content="content-visibility:auto does not affect computed value of 'contain'">
+
+<div id="container"></div>
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<script>
+
+test(() => {
+  assert_equals(getComputedStyle(container).contain, "none");
+  container.style = "content-visibility:hidden";
+  assert_equals(getComputedStyle(container).contentVisibility, "hidden");
+  assert_equals(getComputedStyle(container).contain, "none");
+}, "content-visibility:hidden does not affect computed value of 'contain'");
+
+test(() => {
+  assert_equals(getComputedStyle(container).contain, "none");
+  container.style = "content-visibility:auto;contain:layout;";
+  assert_equals(getComputedStyle(container).contentVisibility, "auto");
+  assert_equals(getComputedStyle(container).contain, "layout");
+}, "content-visibility:auto does not affect computed value of 'contain'");
+
+</script>