diff --git a/packages/fast-usdc/test/fast-usdc.contract.test.ts b/packages/fast-usdc/test/fast-usdc.contract.test.ts
index 05196c6890f..6e339ee0cfa 100644
--- a/packages/fast-usdc/test/fast-usdc.contract.test.ts
+++ b/packages/fast-usdc/test/fast-usdc.contract.test.ts
@@ -6,7 +6,6 @@ import {
   encodeAddressHook,
 } from '@agoric/cosmic-proto/address-hooks.js';
 import { AmountMath } from '@agoric/ertp/src/amountMath.js';
-import type { makeFakeStorageKit } from '@agoric/internal/src/storage-test-utils.js';
 import {
   eventLoopIteration,
   inspectMapStore,
@@ -141,6 +140,8 @@ const makeTestContext = async (t: ExecutionContext) => {
   const { settlementAccount, poolAccount } = JSON.parse(
     JSON.parse(accountsData!).values[0],
   );
+  t.is(settlementAccount, 'agoric1qyqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqc09z0g');
+  t.is(poolAccount, 'agoric1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqp7zqht');
   const mint = async (e: CctpTxEvidence) => {
     const rxd = await receiveUSDCAt(settlementAccount, e.tx.amount);
     await VE(transferBridge).fromBridge(
@@ -362,13 +363,17 @@ const makeLP = async (
 const makeEVM = (template = MockCctpTxEvidences.AGORIC_PLUS_OSMO()) => {
   let nonce = 0;
 
-  const makeTx = (amount: bigint, recipientAddress: string): CctpTxEvidence => {
+  const makeTx = (
+    amount: bigint,
+    recipientAddress: string,
+    nonceOverride?: number,
+  ): CctpTxEvidence => {
     nonce += 1;
 
     const tx: CctpTxEvidence = harden({
       ...template,
-      txHash: `0x00000${nonce}`,
-      blockNumber: template.blockNumber + BigInt(nonce),
+      txHash: `0x00000${nonceOverride || nonce}`,
+      blockNumber: template.blockNumber + BigInt(nonceOverride || nonce),
       tx: { ...template.tx, amount },
       // KLUDGE: CCTP doesn't know about aux; it would be added by OCW
       aux: { ...template.aux, recipientAddress },
@@ -407,6 +412,7 @@ const makeCustomer = (
       t: ExecutionContext<FucContext>,
       amount: bigint,
       EUD: string,
+      nonceOverride?: number,
     ) => {
       const { storage } = t.context.common.bootstrap;
       const accountsData = storage.data.get('fun');
@@ -416,7 +422,7 @@ const makeCustomer = (
       const recipientAddress = encodeAddressHook(settlementAccount, { EUD });
       // KLUDGE: UI would ask noble for a forwardingAddress
       // "cctp" here has some noble stuff mixed in.
-      const tx = cctp.makeTx(amount, recipientAddress);
+      const tx = cctp.makeTx(amount, recipientAddress, nonceOverride);
       t.log(who, 'signs CCTP for', amount, 'uusdc w/EUD:', EUD);
       txPublisher.publish(tx);
       sent.push(tx);
@@ -782,8 +788,7 @@ test.serial('C20 - Contract MUST function with an empty pool', async t => {
 
 test.todo('C18 - forward - MUST log and alert these incidents');
 
-// FIXME; passes but causes the next test to fail
-test.skip('Settlement for unknown transaction (operator down)', async t => {
+test.serial('Settlement for unknown transaction (operator down)', async t => {
   const {
     sync,
     bridges: { snapshot, since },
@@ -791,6 +796,7 @@ test.skip('Settlement for unknown transaction (operator down)', async t => {
     common: {
       bootstrap: { storage },
       commonPrivateArgs: { feeConfig },
+      mocks: { transferBridge },
       utils: { transmitTransferAck },
     },
     mint,
@@ -805,7 +811,7 @@ test.skip('Settlement for unknown transaction (operator down)', async t => {
   const opDown = makeCustomer('Otto', cctp, txPub.publisher, feeConfig);
 
   const bridgePos = snapshot();
-  const EUD = 'osmo12345';
+  const EUD = 'osmo10tt0';
   const mintAmt = 5_000_000n;
   const sent = await opDown.sendFast(t, mintAmt, EUD);
   await mint(sent);
@@ -835,9 +841,13 @@ test.skip('Settlement for unknown transaction (operator down)', async t => {
   // 'C12 - Contract MUST only pay back the Pool (fees) only if they started the advance before USDC is minted',
   operators[0].setActive(true);
   operators[1].setActive(true);
-  await opDown.sendFast(t, mintAmt, EUD);
+  // set the 3rd operator to inactive so it doesn't report a 2nd time
+  operators[2].setActive(false);
+
+  // compute nonce from initial report so a new txId is not generated by `sendFast` helper
+  const nonce = Number(sent.txHash.slice(2));
+  await opDown.sendFast(t, mintAmt, EUD, nonce);
 
-  await transmitTransferAck();
   const [outgoingForward] = since(bridgePos).local;
   t.like(outgoingForward, {
     type: 'VLOCALCHAIN_EXECUTE_TX',
@@ -848,7 +858,6 @@ test.skip('Settlement for unknown transaction (operator down)', async t => {
       },
     ],
   });
-
   const [outgoingForwardMessage] = outgoingForward.messages;
   t.is(
     outgoingForwardMessage.token.amount,
@@ -857,14 +866,26 @@ test.skip('Settlement for unknown transaction (operator down)', async t => {
   );
 
   const forwardInfo = JSON.parse(outgoingForwardMessage.memo).forward;
-  t.is(forwardInfo.receiver, EUD, 'receiver is osmo12345');
-
-  // t.deepEqual(storage.getDeserialized(`fun.txns.${sent.txHash}`), [
-  //   // { evidence: sent, status: 'OBSERVED' }, // no OBSERVED state recorded
-  //   { status: 'FORWARDED' },
-  // ]);
+  t.is(forwardInfo.receiver, EUD, 'receiver is osmo10tt0');
+
+  // in lieu of transmitTransferAck so we can set a nonce that matches our initial Advance
+  await E(transferBridge).fromBridge(
+    buildVTransferEvent({
+      receiver: outgoingForwardMessage.receiver,
+      sender: outgoingForwardMessage.sender,
+      target: outgoingForwardMessage.sender,
+      sourceChannel: outgoingForwardMessage.sourceChannel,
+      sequence: BigInt(nonce),
+      denom: outgoingForwardMessage.token.denom,
+      amount: BigInt(outgoingForwardMessage.token.amount),
+    }),
+  );
+  await eventLoopIteration();
 
-  // await transmitTransferAck(); // ???
+  t.deepEqual(storage.getDeserialized(`fun.txns.${sent.txHash}`), [
+    // { evidence: sent, status: 'OBSERVED' }, // no OBSERVED state recorded
+    { status: 'FORWARDED' },
+  ]);
 });
 
 test.serial('mint received why ADVANCING', async t => {