diff --git a/Tests/LibWeb/Text/expected/ResizeObserver/notify-if-node-is-removed.txt b/Tests/LibWeb/Text/expected/ResizeObserver/notify-if-node-is-removed.txt
new file mode 100644
index 0000000000..573125003a
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/ResizeObserver/notify-if-node-is-removed.txt
@@ -0,0 +1,2 @@
+    Size changed: 200px x 200px
+Size changed: 0px x 0px
diff --git a/Tests/LibWeb/Text/expected/ResizeObserver/notify-if-parent-is-removed.txt b/Tests/LibWeb/Text/expected/ResizeObserver/notify-if-parent-is-removed.txt
new file mode 100644
index 0000000000..573125003a
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/ResizeObserver/notify-if-parent-is-removed.txt
@@ -0,0 +1,2 @@
+    Size changed: 200px x 200px
+Size changed: 0px x 0px
diff --git a/Tests/LibWeb/Text/input/ResizeObserver/notify-if-node-is-removed.html b/Tests/LibWeb/Text/input/ResizeObserver/notify-if-node-is-removed.html
new file mode 100644
index 0000000000..f34246e8ad
--- /dev/null
+++ b/Tests/LibWeb/Text/input/ResizeObserver/notify-if-node-is-removed.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<head>
+    <style>
+        #box {
+            width: 200px;
+            height: 200px;
+            background-color: lightblue;
+        }
+    </style>
+</head>
+<body>
+    <div id="box"></div>
+</body>
+<script src="../include.js"></script>
+<script>
+    asyncTest(async done => {
+        const box = document.getElementById("box");
+
+        let resolve = null;
+        function createResizeObserverPromise() {
+            return new Promise(r => {
+                resolve = r;
+            });
+        }
+
+        const resizeObserver = new ResizeObserver(entries => {
+            for (let entry of entries) {
+                const { width, height } = entry.contentRect;
+                println(`Size changed: ${width}px x ${height}px`);
+            }
+
+            if (resolve) resolve();
+        });
+
+        let observerCallbackInvocation = createResizeObserverPromise();
+        resizeObserver.observe(box);
+        await observerCallbackInvocation;
+
+        box.remove();
+
+        observerCallbackInvocation = createResizeObserverPromise();
+        await observerCallbackInvocation;
+
+        done();
+    });
+</script>
diff --git a/Tests/LibWeb/Text/input/ResizeObserver/notify-if-parent-is-removed.html b/Tests/LibWeb/Text/input/ResizeObserver/notify-if-parent-is-removed.html
new file mode 100644
index 0000000000..928288d02e
--- /dev/null
+++ b/Tests/LibWeb/Text/input/ResizeObserver/notify-if-parent-is-removed.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<head>
+    <style>
+        #box {
+            width: 200px;
+            height: 200px;
+            background-color: lightblue;
+        }
+    </style>
+</head>
+<body>
+    <div><div id="box"></div></div>
+</body>
+<script src="../include.js"></script>
+<script>
+    asyncTest(async done => {
+        const box = document.getElementById("box");
+
+        let resolve = null;
+        function createResizeObserverPromise() {
+            return new Promise(r => {
+                resolve = r;
+            });
+        }
+
+        const resizeObserver = new ResizeObserver(entries => {
+            for (let entry of entries) {
+                const { width, height } = entry.contentRect;
+                println(`Size changed: ${width}px x ${height}px`);
+            }
+
+            if (resolve) resolve();
+        });
+
+        let observerCallbackInvocation = createResizeObserverPromise();
+        resizeObserver.observe(box);
+        await observerCallbackInvocation;
+
+        box.parentElement.remove();
+
+        observerCallbackInvocation = createResizeObserverPromise();
+        await observerCallbackInvocation;
+
+        done();
+    });
+</script>
diff --git a/Userland/Libraries/LibWeb/DOM/Node.cpp b/Userland/Libraries/LibWeb/DOM/Node.cpp
index 00e7762e66..9c6bfc6493 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Node.cpp
@@ -974,6 +974,12 @@ void Node::inserted()
     set_needs_style_update(true);
 }
 
+void Node::removed_from(Node*)
+{
+    m_layout_node = nullptr;
+    m_paintable = nullptr;
+}
+
 ParentNode* Node::parent_or_shadow_host()
 {
     if (is<ShadowRoot>(*this))
diff --git a/Userland/Libraries/LibWeb/DOM/Node.h b/Userland/Libraries/LibWeb/DOM/Node.h
index b83ce38bb9..85b3f65b44 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.h
+++ b/Userland/Libraries/LibWeb/DOM/Node.h
@@ -187,7 +187,7 @@ public:
     Element const* parent_element() const;
 
     virtual void inserted();
-    virtual void removed_from(Node*) { }
+    virtual void removed_from(Node*);
     virtual void children_changed() { }
     virtual void adopted_from(Document&) { }
     virtual void cloned(Node&, bool) {};
