diff --git a/packages/boot/test/bootstrapTests/orchestration.test.ts b/packages/boot/test/bootstrapTests/orchestration.test.ts
index 0de187aa734..ae79ea51687 100644
--- a/packages/boot/test/bootstrapTests/orchestration.test.ts
+++ b/packages/boot/test/bootstrapTests/orchestration.test.ts
@@ -16,6 +16,7 @@ import { SIMULATED_ERRORS } from '@agoric/vats/tools/fake-bridge.js';
 import fetchedChainInfo from '@agoric/orchestration/src/fetched-chain-info.js';
 import { buildVTransferEvent } from '@agoric/orchestration/tools/ibc-mocks.js';
 import { BridgeId } from '@agoric/internal';
+import { makeTestAddress } from '@agoric/orchestration/tools/make-test-address.js';
 import {
   makeWalletFactoryContext,
   type WalletFactoryTestContext,
@@ -410,8 +411,9 @@ test.serial('basic-flows', async t => {
   const publicSubscriberPaths = Object.fromEntries(
     wd.getCurrentWalletRecord().offerToPublicSubscriberPaths,
   );
+  const expectedAddress = makeTestAddress();
   t.deepEqual(publicSubscriberPaths['request-loa'], {
-    account: 'published.basicFlows.agoric1fakeLCAAddress',
+    account: `published.basicFlows.${expectedAddress}`,
   });
   t.like(wd.getLatestUpdateRecord(), {
     status: { id: 'request-loa', numWantsSatisfied: 1 },
@@ -487,6 +489,8 @@ test.serial('basic-flows', async t => {
   await runInbound(
     BridgeId.VTRANSFER,
     buildVTransferEvent({
+      receiver: expectedAddress,
+      target: expectedAddress,
       sourceChannel: 'channel-62',
       sequence: '1',
     }),
@@ -598,7 +602,8 @@ test.serial('basic-flows - portfolio holder', async t => {
       [
         'request-portfolio-acct',
         {
-          agoric: 'published.basicFlows.agoric1fakeLCAAddress1',
+          agoric:
+            'published.basicFlows.agoric1qyqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqc09z0g',
           cosmoshub: 'published.basicFlows.cosmos1test2',
           osmosis: 'published.basicFlows.cosmos1test3',
         },
@@ -615,7 +620,10 @@ test.serial('basic-flows - portfolio holder', async t => {
     remoteAddress:
       '/ibc-hop/connection-1/ibc-port/icahost/ordered/{"version":"ics27-1","controllerConnectionId":"connection-1","hostConnectionId":"connection-1649","address":"cosmos1test3","encoding":"proto3","txType":"sdk_multi_msg"}/ibc-channel/channel-4',
   });
-  t.is(readPublished('basicFlows.agoric1fakeLCAAddress1'), '');
+  t.is(
+    readPublished('basicFlows.agoric1qyqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqc09z0g'),
+    '',
+  );
 
   const { BLD } = agoricNamesRemotes.brand;
   BLD || Fail`BLD missing from agoricNames`;
diff --git a/packages/boot/test/fast-usdc/snapshots/fast-usdc.test.ts.md b/packages/boot/test/fast-usdc/snapshots/fast-usdc.test.ts.md
index eae055ef42a..ace588bbdf2 100644
--- a/packages/boot/test/fast-usdc/snapshots/fast-usdc.test.ts.md
+++ b/packages/boot/test/fast-usdc/snapshots/fast-usdc.test.ts.md
@@ -132,19 +132,19 @@ Generated by [AVA](https://avajs.dev).
       [
         'published.fastUsdc',
         {
-          poolAccount: 'agoric1fakeLCAAddress',
-          settlementAccount: 'agoric1fakeLCAAddress1',
+          poolAccount: 'agoric1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqp7zqht',
+          settlementAccount: 'agoric1qyqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqc09z0g',
         },
       ],
       [
-        'published.fastUsdc.agoric1fakeLCAAddress',
+        'published.fastUsdc.agoric1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqp7zqht',
         {
           body: '#""',
           slots: [],
         },
       ],
       [
-        'published.fastUsdc.agoric1fakeLCAAddress1',
+        'published.fastUsdc.agoric1qyqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqc09z0g',
         {
           body: '#""',
           slots: [],
diff --git a/packages/boot/test/fast-usdc/snapshots/fast-usdc.test.ts.snap b/packages/boot/test/fast-usdc/snapshots/fast-usdc.test.ts.snap
index c837074b0fa..0098b4788bf 100644
Binary files a/packages/boot/test/fast-usdc/snapshots/fast-usdc.test.ts.snap and b/packages/boot/test/fast-usdc/snapshots/fast-usdc.test.ts.snap differ
diff --git a/packages/boot/test/orchestration/contract-upgrade.test.ts b/packages/boot/test/orchestration/contract-upgrade.test.ts
index 65293a800b7..553f58f87db 100644
--- a/packages/boot/test/orchestration/contract-upgrade.test.ts
+++ b/packages/boot/test/orchestration/contract-upgrade.test.ts
@@ -6,6 +6,7 @@ import { BridgeId } from '@agoric/internal';
 import { buildVTransferEvent } from '@agoric/orchestration/tools/ibc-mocks.js';
 import fetchedChainInfo from '@agoric/orchestration/src/fetched-chain-info.js';
 import { withChainCapabilities } from '@agoric/orchestration';
+import { makeTestAddress } from '@agoric/orchestration/tools/make-test-address.js';
 import {
   makeWalletFactoryContext,
   type WalletFactoryTestContext,
@@ -100,6 +101,8 @@ test('resume', async t => {
   await runInbound(
     BridgeId.VTRANSFER,
     buildVTransferEvent({
+      sender: makeTestAddress(),
+      target: makeTestAddress(),
       sourceChannel: 'channel-5',
       sequence: '1',
     }),
diff --git a/packages/boot/test/orchestration/restart-contracts.test.ts b/packages/boot/test/orchestration/restart-contracts.test.ts
index b727b8a74be..bf5d22efd07 100644
--- a/packages/boot/test/orchestration/restart-contracts.test.ts
+++ b/packages/boot/test/orchestration/restart-contracts.test.ts
@@ -10,6 +10,7 @@ import {
 import { buildVTransferEvent } from '@agoric/orchestration/tools/ibc-mocks.js';
 import type { UpdateRecord } from '@agoric/smart-wallet/src/smartWallet.js';
 import fetchedChainInfo from '@agoric/orchestration/src/fetched-chain-info.js';
+import { makeTestAddress } from '@agoric/orchestration/tools/make-test-address.js';
 import {
   makeWalletFactoryContext,
   type WalletFactoryTestContext,
@@ -101,6 +102,8 @@ test.serial('send-anywhere', async t => {
   await runInbound(
     BridgeId.VTRANSFER,
     buildVTransferEvent({
+      sender: makeTestAddress(),
+      target: makeTestAddress(),
       sourceChannel: 'channel-5',
       sequence: '1',
     }),
diff --git a/packages/boot/tools/supports.ts b/packages/boot/tools/supports.ts
index 77e1cdc61ca..8f17cb2be16 100644
--- a/packages/boot/tools/supports.ts
+++ b/packages/boot/tools/supports.ts
@@ -7,6 +7,7 @@ import { resolve as importMetaResolve } from 'import-meta-resolve';
 import { basename, join } from 'path';
 import { inspect } from 'util';
 
+import { makeTestAddress } from '@agoric/orchestration/tools/make-test-address.js';
 import { buildSwingset } from '@agoric/cosmic-swingset/src/launch-chain.js';
 import type { TypedPublished } from '@agoric/client-utils';
 import {
@@ -538,7 +539,7 @@ export const makeSwingsetTestKit = async (
         return undefined;
       }
       case `${BridgeId.VLOCALCHAIN}:VLOCALCHAIN_ALLOCATE_ADDRESS`: {
-        const address = `${LOCALCHAIN_DEFAULT_ADDRESS}${lcaAccountsCreated || ''}`;
+        const address = makeTestAddress(lcaAccountsCreated);
         lcaAccountsCreated += 1;
         return address;
       }