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+<!DOCTYPE html>
+<meta charset="utf-8" >
+<meta name="author" title="Di Zhang" href="mailto:dizhangg@chromium.org">
+<meta name="assert" content="Remove assigned light nodes of a slot, when dynamically created.">
+<title>Shadow DOM: Slots and fallback contents</title>
+<link rel="match" href="slot-fallback-content-004-ref.html">
+
+<p>Test passes if there is one line of text "SLOT1" below.</p>
+
+<div id="host1">
+  <slot id="slot1" name="slot1">SLOT1</slot>
+  <div id="A" slot="slot1">FAIL</div>
+</div>
+
+<p>Test passes if empty.</p>
+
+<div id="host2">
+  <slot id="slot2" name="slot2"></slot>
+  <div id="B" slot="slot2">FAIL</div>
+</div>
+
+<p>Test passes if there is one line of text "SLOT3" below.</p>
+
+<div id="host3">
+  <slot id="slot3" name="slot3">SLOT3</slot>
+  <div id="C" slot="slot3">FAIL</div>
+</div>
+
+<p>Test passes if there is one line of text "SLOT4" below.</p>
+
+<div id="host4">
+  <slot id="slot4" name="slot4">SLOT4</slot>
+  <div id="D" slot="slot4">FAIL</div>
+</div>
+
+<script>
+// Remove a slot's assigned node should show fallback content
+const shadowRoot1 = host1.attachShadow({ mode: "open" });
+shadowRoot1.appendChild(slot1);
+A.remove();
+
+// Remove a slot's assigned node with no fallback should show nothing
+const shadowRoot2 = host2.attachShadow({ mode: "open" });
+shadowRoot2.appendChild(slot2);
+B.remove();
+
+// Remove the slot attribute to an assigned node should show fallback content
+const shadowRoot3 = host3.attachShadow({ mode: "open" });
+shadowRoot3.appendChild(slot3);
+C.removeAttribute('slot');
+
+// Change the slot attribute to an assigned node to an unknown slot
+// should show fallback content
+const shadowRoot4 = host4.attachShadow({ mode: "open" });
+shadowRoot4.appendChild(slot4);
+D.setAttribute('slot', 'invalid');
+
+</script>