diff --git a/src/browser/tests/node/replace_child.html b/src/browser/tests/node/replace_child.html
index 18832fd9..45ed1bc5 100644
--- a/src/browser/tests/node/replace_child.html
+++ b/src/browser/tests/node/replace_child.html
@@ -37,4 +37,7 @@
   testing.expectEqual(null, c2.parentNode);
   assertChildren([c3, c4], d1)
   assertChildren([], d2)
+
+  testing.expectEqual(c3, d1.replaceChild(c3, c3));
+  assertChildren([c3, c4], d1)
 </script>
diff --git a/src/browser/webapi/Node.zig b/src/browser/webapi/Node.zig
index 79277f07..7db3d4aa 100644
--- a/src/browser/webapi/Node.zig
+++ b/src/browser/webapi/Node.zig
@@ -500,6 +500,21 @@ pub fn replaceChild(self: *Node, new_child: *Node, old_child: *Node, page: *Page
 
     try validateNodeInsertion(self, new_child);
 
+    // special case: we replace a node by itself
+    if (new_child == old_child) {
+        page.domChanged();
+
+        if (page.hasMutationObservers()) {
+            const parent = new_child._parent.?;
+            const previous_sibling = new_child.previousSibling();
+            const next_sibling = new_child.nextSibling();
+            const replaced = [_]*Node{new_child};
+            page.childListChange(parent, &replaced, &replaced, previous_sibling, next_sibling);
+        }
+
+        return old_child;
+    }
+
     _ = try self.insertBefore(new_child, old_child, page);
     page.removeNode(self, old_child, .{ .will_be_reconnected = false });
     return old_child;