diff --git a/ui/packages/app-shell/src/views/metadata-admin/PermissionMatrixEditor.objectGrantInherited-27010.test.tsx b/ui/packages/app-shell/src/views/metadata-admin/PermissionMatrixEditor.objectGrantInherited-27010.test.tsx
index a75e15c7970..f4bcefdf746 100644
--- a/ui/packages/app-shell/src/views/metadata-admin/PermissionMatrixEditor.objectGrantInherited-27010.test.tsx
+++ b/ui/packages/app-shell/src/views/metadata-admin/PermissionMatrixEditor.objectGrantInherited-27010.test.tsx
@@ -43,6 +43,8 @@ function makeClient(server: FakeServer) {
   return {
     layered: async () => ({ effective: server.set, code: null, overlay: null, overlayScope: null }),
     getDraft: async () => null,
+    // objectstack#26840 — the package door reads its objects through the draft-overlaid door.
+    withPreviewDrafts() { return this; },
     list: async (type: string) =>
       type === 'object' ? server.catalog : type === 'permission' ? [{ name: 'project_editor' }] : [],
     get: async (type: string) => (type === 'object' ? { fields: [{ name: 'notes' }] } : null),
diff --git a/ui/packages/app-shell/src/views/metadata-admin/PermissionMatrixEditor.packageDoorDraftBase-26837.test.tsx b/ui/packages/app-shell/src/views/metadata-admin/PermissionMatrixEditor.packageDoorDraftBase-26837.test.tsx
index be79bdf52d0..eeb7820f968 100644
--- a/ui/packages/app-shell/src/views/metadata-admin/PermissionMatrixEditor.packageDoorDraftBase-26837.test.tsx
+++ b/ui/packages/app-shell/src/views/metadata-admin/PermissionMatrixEditor.packageDoorDraftBase-26837.test.tsx
@@ -99,6 +99,8 @@ function makeClient(server: Server, opts: { draft: Record<string, unknown> | nul
       if (opts.rejectSaveTimeDraft && server.getDraftCalls > 1) throw new Error('draft read failed');
       return opts.draft ? { type: 'permission', name: 'sales_perms', item: opts.draft, version: 'v1' } : null;
     },
+    // objectstack#26840 — the package door reads its objects through the draft-overlaid door.
+    withPreviewDrafts() { return this; },
     // The package declares `a_account` only.
     list: async (type: string) => (type === 'object' ? [{ item: { name: 'a_account' } }] : []),
     get: async () => null,