diff --git a/packages/ses/src/intrinsics.js b/packages/ses/src/intrinsics.js
index 6dd17b58ee..ad8bc3ed42 100644
--- a/packages/ses/src/intrinsics.js
+++ b/packages/ses/src/intrinsics.js
@@ -48,7 +48,9 @@ function initProperty(obj, name, desc) {
       preDesc.enumerable !== desc.enumerable ||
       preDesc.configurable !== desc.configurable
     ) {
-      throw TypeError(`Conflicting definitions of ${name}`);
+      if (name !== 'harden') {
+        throw TypeError(`Conflicting definitions of ${name}`);
+      }
     }
   }
   defineProperty(obj, name, desc);
diff --git a/packages/ses/src/make-hardener.js b/packages/ses/src/make-hardener.js
index fbd9b086ab..471cc6f303 100644
--- a/packages/ses/src/make-hardener.js
+++ b/packages/ses/src/make-hardener.js
@@ -26,7 +26,7 @@ import {
   String,
   TypeError,
   WeakSet,
-  globalThis,
+  // globalThis, // if we suppress native harden
   apply,
   arrayForEach,
   defineProperty,
@@ -131,13 +131,13 @@ const freezeTypedArray = array => {
 export const makeHardener = () => {
   // TODO Get the native hardener to suppressTrapping at each step,
   // rather than freeze. Until then, we cannot use it, which is *expensive*!
-  // TODO Comment out the following to skip the native hardener.
+  // TODO Comment in the following to use the native hardener.
   //
   // Use a native hardener if possible.
-  if (typeof globalThis.harden === 'function') {
-    const safeHarden = globalThis.harden;
-    return safeHarden;
-  }
+  // if (typeof globalThis.harden === 'function') {
+  //   const safeHarden = globalThis.harden;
+  //   return safeHarden;
+  // }
 
   const hardened = new WeakSet();
 
diff --git a/packages/ses/test/native-harden.test.js b/packages/ses/test/native-harden.test.js
index 235ef69aa3..90c32b9f35 100644
--- a/packages/ses/test/native-harden.test.js
+++ b/packages/ses/test/native-harden.test.js
@@ -4,7 +4,7 @@ import { assertFakeFrozen } from './_lockdown-harden-unsafe.js';
 // eslint-disable-next-line import/order
 import test from 'ava';
 
-test('mocked globalThis.harden', t => {
+test.skip('mocked globalThis.harden', t => {
   t.is(harden, mockHarden);
   t.is(harden.isFake, true);