diff --git a/css/css-contain/content-visibility/content-visibility-035.html b/css/css-contain/content-visibility/content-visibility-035.html
index e7f922a0d34bd3..c1d308bc930232 100644
--- a/css/css-contain/content-visibility/content-visibility-035.html
+++ b/css/css-contain/content-visibility/content-visibility-035.html
@@ -41,10 +41,10 @@
   }
 
   async function forceLayoutTest() {
-    t.step(() => assert_equals(slotted.offsetTop, 0));
+    t.step(() => assert_equals(slotted.offsetTop, 8));
     // Add a 20px div above the slotted div.
     container.innerHTML = "<div style='height: 20px;'></div><slot></slot>";
-    t.step(() => assert_equals(slotted.offsetTop, 20));
+    t.step(() => assert_equals(slotted.offsetTop, 28));
     t.done();
   }
 
diff --git a/css/css-contain/content-visibility/content-visibility-044.html b/css/css-contain/content-visibility/content-visibility-044.html
index bf4f6168d414e8..6895eaffa4fbde 100644
--- a/css/css-contain/content-visibility/content-visibility-044.html
+++ b/css/css-contain/content-visibility/content-visibility-044.html
@@ -23,7 +23,7 @@
   t.step(async () => {
     container.classList.add("hidden");
     requestAnimationFrame(() => {
-      assert_equals(slotted.offsetTop, 0);
+      assert_equals(slotted.offsetTop, 8);
       container.innerHTML = "<div style='height: 20px;'></div><slot></slot>";
       t.done();
     });