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+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="utf-8">
+        <title>CSS Test: stacking context creates isolated group</title>
+        <link rel="author" title="Mirela Budăeș" href="mailto:mbudaes@adobe.com">
+        <link rel="help" href="https://drafts.fxtf.org/compositing-1/#mix-blend-mode">
+        <link rel="reviewer" title="Mihai Balan" href="mailto:mibalan@adobe.com">
+        <link rel="reviewer" title="Rik Cabanier" href="mailto:cabanier@adobe.com">
+        <meta name="assert" content="Test checks that properties that cause the creation of stacking context cause a group to be isolated">
+        <link rel="match" href="reference/mix-blend-mode-stacking-context-creates-isolation-ref.html">
+        <style>
+            .container{
+                margin: 30px;
+                width: 130px;
+                height: 130px;
+                float: left;
+                background: yellow;/*rgb(255,255,0);*/
+            }
+            .simple{
+                background: lime;/* rgb(0,255,0);*/
+                width: 100px;
+                height: 100px;
+                position: fixed;
+            }
+            .mixed {
+                background: red;/*rgb(255,0,0);*/
+                margin-top: 20px;
+                margin-left: 20px;
+                width: 100px;
+                height: 100px;
+                mix-blend-mode: multiply;
+            }
+        </style>
+    </head>
+    <body>
+        <p>Test passes if there is no complete red square on the screen. <br>
+        You should see two overlapping lime and red squares on top of a yellow one. <br>
+        At the intersection of the lime and red squares, a black square will be created. </p>
+        <div class="container">
+            <div class="simple">
+                <div class="mixed"></div>
+            </div>
+        </div>
+    </body>
+</html>