diff --git a/packages/boot/test/bootstrapTests/test-vat-orchestration.ts b/packages/boot/test/bootstrapTests/test-vat-orchestration.ts
index 1949ce8b8049..5eae438d01a0 100644
--- a/packages/boot/test/bootstrapTests/test-vat-orchestration.ts
+++ b/packages/boot/test/bootstrapTests/test-vat-orchestration.ts
@@ -6,7 +6,7 @@ import {
   MsgDelegate,
   MsgDelegateResponse,
 } from '@agoric/cosmic-proto/cosmos/staking/v1beta1/tx.js';
-import { Any } from '@agoric/cosmic-proto/google/protobuf/any';
+import { Any } from '@agoric/cosmic-proto/google/protobuf/any.js';
 import type { ChainAccount, OrchestrationService } from '@agoric/orchestration';
 import { decodeBase64 } from '@endo/base64';
 import { M, matches } from '@endo/patterns';
diff --git a/packages/cosmic-proto/test/test-vatsafe.js b/packages/cosmic-proto/test/test-vatsafe.js
index ee2992e718a0..db0d5175951f 100644
--- a/packages/cosmic-proto/test/test-vatsafe.js
+++ b/packages/cosmic-proto/test/test-vatsafe.js
@@ -3,7 +3,7 @@
 import test from '@endo/ses-ava/prepare-endo.js';
 import { cosmos } from '@agoric/cosmic-proto';
 
-import { MsgDelegate } from '@agoric/cosmic-proto/cosmos/staking/v1beta1/tx';
+import { MsgDelegate } from '@agoric/cosmic-proto/cosmos/staking/v1beta1/tx.js';
 
 // @ts-expect-error
 cosmos.staking.v1beta1.MsgDelegate.missing;