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 d377fd8793..0af5908b4a 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,
@@ -128,11 +128,14 @@ const freezeTypedArray = array => {
  * @returns {Harden}
  */
 export const makeHardener = () => {
-  // Use a native hardener if possible.
-  if (typeof globalThis.harden === 'function') {
-    const safeHarden = globalThis.harden;
-    return safeHarden;
-  }
+  // TODO Get the native hardener to suppressTrapping at each step,
+  // rather than freeze. Until then, it is *expensive*!
+  //
+  // // Use a native hardener if possible.
+  // if (typeof globalThis.harden === 'function') {
+  //   const safeHarden = globalThis.harden;
+  //   return safeHarden;
+  // }
 
   const hardened = new WeakSet();
 
@@ -238,7 +241,9 @@ export const makeHardener = () => {
                     // NOTE: Calls getter during harden, which seems dangerous.
                     // But we're only calling the problematic getter whose
                     // hazards we think we understand.
-                    // @ts-expect-error TS should know FERAL_STACK_GETTER
+
+                    // TODO either remove or at-ts-expect-error
+                    // @ts-ignore-error TS should know FERAL_STACK_GETTER
                     // cannot be `undefined` here.
                     // See https://github.com/endojs/endo/pull/2232#discussion_r1575179471
                     value: apply(FERAL_STACK_GETTER, obj, []),
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);