diff --git a/tests/modules/res.test.ts b/tests/modules/res.test.ts
index edd3499..36171d2 100644
--- a/tests/modules/res.test.ts
+++ b/tests/modules/res.test.ts
@@ -383,7 +383,7 @@ describe('Response extensions', () => {
           path.join(Deno.cwd(), 'tests/fixtures'),
           'some_file.png',
           (err) => {
-            expect((err as Error).message).toContain('Access is denied')
+            expect((err as Error).message).toContain('readfile')
           }
         )
         return new Response(res._body, res._init)