diff --git a/src/components/core/testing/private/a11y-tree-snapshot.ts b/src/components/core/testing/private/a11y-tree-snapshot.ts
index db975d0875..57e4c576ba 100644
--- a/src/components/core/testing/private/a11y-tree-snapshot.ts
+++ b/src/components/core/testing/private/a11y-tree-snapshot.ts
@@ -1,4 +1,4 @@
-import { aTimeout, expect, fixture } from '@open-wc/testing';
+import { aTimeout, expect, fixture, fixtureCleanup } from '@open-wc/testing';
 import { a11ySnapshot } from '@web/test-runner-commands';
 import type { TemplateResult } from 'lit';
 import { html } from 'lit/static-html.js';
@@ -18,6 +18,7 @@ async function a11yTreeEqualSnapshot(): Promise<void> {
 
   const htmlWrapper = await fixture(html`<p>${JSON.stringify(snapshot, null, 2)}</p>`);
   await expect(htmlWrapper).to.be.equalSnapshot();
+  fixtureCleanup();
 }
 
 /**