diff --git a/testing/_testing/deno.ts b/testing/_testing/deno.ts
index 82407d21..e64678c3 100644
--- a/testing/_testing/deno.ts
+++ b/testing/_testing/deno.ts
@@ -4,6 +4,8 @@ import { format } from "./common.ts"
 
 /** Deno test runner. */
 export const test = Object.assign(function (name: string, fn: () => Promisable<void>, options?: options) {
+  options ??= {}
+  options.permissions ??= "none"
   return globalThis.Deno.test({ name: format(name), fn, ...options })
 }, {
   only: function (name: string, fn: () => Promisable<void>, options?: options) {