diff --git a/css/css-anchor-position/anchor-name-style-contained-dynamic.html b/css/css-anchor-position/anchor-name-style-contained-dynamic.html
deleted file mode 100644
index 1413fe9d772b67..00000000000000
--- a/css/css-anchor-position/anchor-name-style-contained-dynamic.html
+++ /dev/null
@@ -1,71 +0,0 @@
-<!DOCTYPE html>
-<title>CSS Anchor Positioning: anchor-name is style contained - dynamic containment</title>
-<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#name">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/resources/check-layout-th.js"></script>
-<script src="support/test-common.js"></script>
-<style>
-  .container {
-    position: relative;
-  }
-  .anchor {
-    width: 100px;
-    height: 100px;
-    anchor-name: var(--anchor-name);
-  }
-  .contain-style {
-    contain: style;
-  }
-  .target {
-    position: absolute;
-    position-anchor: var(--anchor-name);
-    top: anchor(bottom, 50px);
-  }
-  #a1 { --anchor-name: --a1; }
-  #a2 { --anchor-name: --a2; }
-  #a3 { --anchor-name: --a3; }
-</style>
-<div id="a1" class="container">
-  <div class="anchor"></div>
-  <div class="contain-style">
-    <div class="anchor"></div>
-  </div>
-  <div class="target" data-offset-y="100"></div>
-</div>
-<div id="a2" class="container">
-  <div class="anchor"></div>
-  <div class="anchor"></div>
-  <div class="contain-style">
-    <div class="target" data-offset-y="50"></div>
-  </div>
-</div>
-<div id="a3" class="container">
-  <div class="anchor contain-style">
-    <div class="target" data-offset-y="50"></div>
-  </div>
-</div>
-<script type="module">
-  await checkLayoutForAnchorPos('.target');
-
-  const t1 = document.querySelector("#a1 .target");
-  const t2 = document.querySelector("#a2 .target");
-  const t3 = document.querySelector("#a3 .target");
-  const t4 = document.querySelector("#a4 .target");
-  const t5 = document.querySelector("#a5 .target");
-  t1.setAttribute("data-offset-y", "200");
-  t2.setAttribute("data-offset-y", "200");
-  t3.setAttribute("data-offset-y", "100");
-  for (let element of document.querySelectorAll(".contain-style")) {
-    element.style.contain = "none";
-  }
-  await checkLayoutForAnchorPos('.target');
-
-  t1.setAttribute("data-offset-y", "100");
-  t2.setAttribute("data-offset-y", "50");
-  t3.setAttribute("data-offset-y", "50");
-  for (let element of document.querySelectorAll(".contain-style")) {
-    element.style.contain = "";
-  }
-  await checkLayoutForAnchorPos('.target');
-</script>
diff --git a/css/css-anchor-position/anchor-name-style-contained.html b/css/css-anchor-position/anchor-name-style-contained.html
deleted file mode 100644
index b88afe4107dd57..00000000000000
--- a/css/css-anchor-position/anchor-name-style-contained.html
+++ /dev/null
@@ -1,60 +0,0 @@
-<!DOCTYPE html>
-<title>CSS Anchor Positioning: anchor-name is style contained</title>
-<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#name">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/resources/check-layout-th.js"></script>
-<script src="support/test-common.js"></script>
-<style>
-  .container {
-    position: relative;
-  }
-  .anchor {
-    width: 100px;
-    height: 100px;
-    anchor-name: var(--anchor-name);
-  }
-  .contain-style {
-    contain: style;
-  }
-  .target {
-    position: absolute;
-    position-anchor: var(--anchor-name);
-    top: anchor(bottom, 50px);
-  }
-  #a1 { --anchor-name: --a1; }
-  #a2 { --anchor-name: --a2; }
-  #a3 { --anchor-name: --a3; }
-  #a4 { --anchor-name: --a4; }
-  #a5 { --anchor-name: --a5; }
-</style>
-<body onload="checkLayoutForAnchorPos('.target')">
-<div id="a1" class="container">
-  <div class="anchor"></div>
-  <div class="contain-style">
-    <div class="anchor"></div>
-  </div>
-  <div class="target" data-offset-y="100"></div>
-</div>
-<div id="a2" class="container">
-  <div class="anchor"></div>
-  <div class="anchor"></div>
-  <div class="contain-style">
-    <div class="target" data-offset-y="50"></div>
-  </div>
-</div>
-<div id="a3" class="container">
-  <div class="contain-style">
-    <div class="anchor"></div>
-    <div class="target" data-offset-y="100"></div>
-  </div>
-</div>
-<div id="a4" class="container">
-  <div class="anchor contain-style">
-    <div class="target" data-offset-y="50"></div>
-  </div>
-</div>
-<div id="a5" class="container">
-  <div class="anchor contain-style"></div>
-  <div class="target" data-offset-y="100"></div>
-</div>
diff --git a/css/css-anchor-position/anchor-position-dynamic-004.html b/css/css-anchor-position/anchor-position-dynamic-004.html
index 146703e628b7f5..b7944652a0b21d 100644
--- a/css/css-anchor-position/anchor-position-dynamic-004.html
+++ b/css/css-anchor-position/anchor-position-dynamic-004.html
@@ -30,7 +30,7 @@
 </style>
 <body>
   <div class="cb">
-    <div style="contain: layout size paint; height: 50px">
+    <div style="contain: strict; height: 50px">
       <div class="spacer" style="height: 10px"></div>
       <div id="anchor1"></div>
     </div>
