diff --git a/packages/sveltekit/test/client/vendor/lookUpCache.test.ts b/packages/sveltekit/test/client/vendor/lookUpCache.test.ts
index 76c44d5cc21b..8be8f0fdac9a 100644
--- a/packages/sveltekit/test/client/vendor/lookUpCache.test.ts
+++ b/packages/sveltekit/test/client/vendor/lookUpCache.test.ts
@@ -1,67 +1,45 @@
 import * as utils from '@sentry/utils';
+import { JSDOM } from 'jsdom';
 import { vi } from 'vitest';
 
 import { isRequestCached } from '../../../src/client/vendor/lookUpCache';
 
-let scriptElement: {
-  textContent: string;
-  getAttribute: (name: string) => string | null;
-} | null;
+globalThis.document = new JSDOM().window.document;
 
-vi.spyOn(utils, 'getDomElement').mockImplementation(() => {
-  return scriptElement;
-});
+vi.useFakeTimers().setSystemTime(new Date('2023-06-22'));
+vi.spyOn(performance, 'now').mockReturnValue(1000);
 
 describe('isRequestCached', () => {
   it('should return true if a script tag with the same selector as the constructed request selector is found', () => {
-    scriptElement = {
-      textContent: 'test',
-      getAttribute: () => null,
-    };
+    globalThis.document.body.innerHTML =
+      '<script type="application/json" data-sveltekit-fetched data-url="/api/todos/1">{"status":200}</script>';
 
     expect(isRequestCached('/api/todos/1', undefined)).toBe(true);
   });
 
   it('should return false if a script with the same selector as the constructed request selector is not found', () => {
-    scriptElement = null;
+    globalThis.document.body.innerHTML = '';
 
     expect(isRequestCached('/api/todos/1', undefined)).toBe(false);
   });
 
   it('should return true if a script with the same selector as the constructed request selector is found and its TTL is valid', () => {
-    scriptElement = {
-      textContent: 'test',
-      getAttribute: () => (performance.now() / 1000 + 1).toString(),
-    };
+    globalThis.document.body.innerHTML =
+      '<script type="application/json" data-sveltekit-fetched data-url="/api/todos/1" data-ttl="10">{"status":200}</script>';
 
     expect(isRequestCached('/api/todos/1', undefined)).toBe(true);
   });
 
   it('should return false if a script with the same selector as the constructed request selector is found and its TTL is expired', () => {
-    scriptElement = {
-      textContent: 'test',
-      getAttribute: () => (performance.now() / 1000 - 1).toString(),
-    };
-
-    expect(isRequestCached('/api/todos/1', undefined)).toBe(false);
-  });
-
-  it("should return false if the TTL is set but can't be parsed", () => {
-    scriptElement = {
-      textContent: 'test',
-      getAttribute: () => 'NotANumber',
-    };
+    globalThis.document.body.innerHTML =
+      '<script type="application/json" data-sveltekit-fetched data-url="/api/todos/1" data-ttl="1">{"status":200}</script>';
 
     expect(isRequestCached('/api/todos/1', undefined)).toBe(false);
   });
 
-  it('should return false if an error was thrown turing TTL evaluation', () => {
-    scriptElement = {
-      textContent: 'test',
-      getAttribute: () => {
-        throw new Error('test');
-      },
-    };
+  it("should return false if the TTL is set but can't be parsed as a number", () => {
+    globalThis.document.body.innerHTML =
+      '<script type="application/json" data-sveltekit-fetched data-url="/api/todos/1" data-ttl="notANumber">{"status":200}</script>';
 
     expect(isRequestCached('/api/todos/1', undefined)).toBe(false);
   });