diff --git a/.changeset/funny-numbers-prove.md b/.changeset/funny-numbers-prove.md
new file mode 100644
index 000000000..2ffd74ccb
--- /dev/null
+++ b/.changeset/funny-numbers-prove.md
@@ -0,0 +1,5 @@
+---
+'@lion/ui': patch
+---
+
+feat: allow SlotRerenderObject to first render on connectedCallback via `firstRenderOnConnected`
diff --git a/packages/ui/components/core/test/SlotMixin.test.js b/packages/ui/components/core/test/SlotMixin.test.js
index df9b00f0f..fd0719b87 100644
--- a/packages/ui/components/core/test/SlotMixin.test.js
+++ b/packages/ui/components/core/test/SlotMixin.test.js
@@ -1,6 +1,7 @@
 import sinon from 'sinon';
 import { defineCE, expect, fixture, fixtureSync, unsafeStatic, html } from '@open-wc/testing';
-import { ScopedElementsMixin } from '@open-wc/scoped-elements';
+// @ts-expect-error
+import { ScopedElementsMixin } from '@open-wc/scoped-elements/lit-element.js';
 import { SlotMixin } from '@lion/ui/core.js';
 import { LitElement } from 'lit';
 
@@ -511,10 +512,10 @@ describe('SlotMixin', () => {
       class ScopedEl extends LitElement {}
 
       const tagName = defineCE(
+        // @ts-ignore
         class extends ScopedElementsMixin(SlotMixin(LitElement)) {
           static get scopedElements() {
             return {
-              // @ts-expect-error
               ...super.scopedElements,
               'scoped-elm': ScopedEl,
             };
@@ -547,10 +548,10 @@ describe('SlotMixin', () => {
       class ScopedEl extends LitElement {}
 
       const tagName = defineCE(
+        // @ts-expect-error
         class extends ScopedElementsMixin(SlotMixin(LitElement)) {
           static get scopedElements() {
             return {
-              // @ts-expect-error
               ...super.scopedElements,
               'scoped-el': ScopedEl,
             };