diff --git a/src/Umbraco.Web.UI.Client/src/backoffice/shared/components/extension-slot/extension-slot.element.ts b/src/Umbraco.Web.UI.Client/src/backoffice/shared/components/extension-slot/extension-slot.element.ts
index 42e57e47d8..795d5b2cae 100644
--- a/src/Umbraco.Web.UI.Client/src/backoffice/shared/components/extension-slot/extension-slot.element.ts
+++ b/src/Umbraco.Web.UI.Client/src/backoffice/shared/components/extension-slot/extension-slot.element.ts
@@ -5,8 +5,7 @@ import { css } from 'lit';
 import { map } from 'rxjs';
 import { repeat } from 'lit/directives/repeat.js';
 import { umbExtensionsRegistry } from '@umbraco-cms/extensions-registry';
-import { createExtensionElement } from '@umbraco-cms/extensions-api';
-import { isManifestElementableType } from 'src/core/extensions-api/is-manifest-elementable-type.function';
+import { createExtensionElement, isManifestElementableType } from '@umbraco-cms/extensions-api';
 import { UmbLitElement } from '@umbraco-cms/element';
 
 export type InitializedExtension = { alias: string; weight: number; component: HTMLElement | null };
diff --git a/src/Umbraco.Web.UI.Client/src/backoffice/shared/components/extension-slot/extension-slot.test.ts b/src/Umbraco.Web.UI.Client/src/backoffice/shared/components/extension-slot/extension-slot.test.ts
index b95c8e64dd..d29223e7e2 100644
--- a/src/Umbraco.Web.UI.Client/src/backoffice/shared/components/extension-slot/extension-slot.test.ts
+++ b/src/Umbraco.Web.UI.Client/src/backoffice/shared/components/extension-slot/extension-slot.test.ts
@@ -9,6 +9,10 @@ class MyExtensionSlotManifestElement extends HTMLElement {
 
 }
 
+function sleep(ms: number) {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}
+
 describe('UmbExtensionSlotElement', () => {
 
 
@@ -74,7 +78,9 @@ describe('UmbExtensionSlotElement', () => {
 				html`<umb-extension-slot type='dashboard' .filter=${(x: ManifestDashboard) => x.alias === 'unit-test-ext-slot-element-manifest'}></umb-extension-slot>`
 			);
 
-			expect(element.firstChild).to.be.instanceOf(MyExtensionSlotManifestElement);
+      await sleep(0);
+
+			expect(element.shadowRoot!.firstElementChild).to.be.instanceOf(MyExtensionSlotManifestElement);
 		});
 
 		it('use the render method', async () => {
@@ -88,8 +94,10 @@ describe('UmbExtensionSlotElement', () => {
 						</umb-extension-slot>`
 			);
 
-			expect(element.firstChild?.nodeName).to.be.equal('bla');
-			expect(element.firstChild?.firstChild).to.be.instanceOf(MyExtensionSlotManifestElement);
+      await sleep(0);
+
+			expect(element.shadowRoot!.firstElementChild?.nodeName).to.be.equal('BLA');
+			expect(element.shadowRoot!.firstElementChild?.firstElementChild).to.be.instanceOf(MyExtensionSlotManifestElement);
 		});
 	});
 
diff --git a/src/Umbraco.Web.UI.Client/src/core/extensions-api/index.ts b/src/Umbraco.Web.UI.Client/src/core/extensions-api/index.ts
index 936aeb172b..56e697161e 100644
--- a/src/Umbraco.Web.UI.Client/src/core/extensions-api/index.ts
+++ b/src/Umbraco.Web.UI.Client/src/core/extensions-api/index.ts
@@ -2,4 +2,7 @@ export * from './registry/extension.registry';
 export * from './create-extension-element.function';
 export * from './has-default-export.function';
 export * from './is-manifest-element-name-type.function';
+export * from './is-manifest-elementable-type.function';
+export * from './is-manifest-js-type.function';
+export * from './is-manifest-loader-type.function';
 export * from './load-extension.function';