diff --git a/packages/inter-protocol/test/liquidationVisibility/assertions.js b/packages/inter-protocol/test/liquidationVisibility/assertions.js
index 81ff3c7434e..82a29889c55 100644
--- a/packages/inter-protocol/test/liquidationVisibility/assertions.js
+++ b/packages/inter-protocol/test/liquidationVisibility/assertions.js
@@ -33,25 +33,21 @@ export const assertBidderPayout = async (
     ));
 };
 
-export const assertReserveState = async (t, metricsTopic, method, expected) => {
-  const m = await subscriptionTracker(t, metricsTopic);
-
+export const assertReserveState = async (metricTracker, method, expected) => {
   switch (method) {
     case 'initial':
-      await m.assertInitial(expected);
+      await metricTracker.assertInitial(expected);
       break;
     case 'like':
-      await m.assertLike(expected);
+      await metricTracker.assertLike(expected);
       break;
     case 'state':
-      await m.assertState(expected);
+      await metricTracker.assertState(expected);
       break;
     default:
       console.log('Default');
       break;
   }
-
-  return m;
 };
 
 export const assertVaultCurrentDebt = async (t, vault, debt) => {
diff --git a/packages/inter-protocol/test/liquidationVisibility/test-liquidationVisibility.js b/packages/inter-protocol/test/liquidationVisibility/test-liquidationVisibility.js
index 4152d36b06a..720893167d8 100644
--- a/packages/inter-protocol/test/liquidationVisibility/test-liquidationVisibility.js
+++ b/packages/inter-protocol/test/liquidationVisibility/test-liquidationVisibility.js
@@ -35,7 +35,8 @@ import {
   startAuctionClock,
   getDataFromVstorage,
   openVault,
-} from './tools.js';
+  getMetricTrackers, adjustVault
+} from "./tools.js";
 import {
   assertBidderPayout,
   assertCollateralProceeds,
@@ -235,21 +236,20 @@ test('Auction sells all collateral w/shortfall', async t => {
   } = services;
   await E(reserveCreatorFacet).addIssuer(aeth.issuer, 'Aeth');
 
-  const metricsTopic = await E.get(E(reservePublicFacet).getPublicTopics())
-    .metrics;
-  const m = await assertReserveState(
+  const { reserveTracker, collateralManagerTracker } = await getMetricTrackers({
     t,
-    metricsTopic,
+    collateralManager: aethCollateralManager,
+    reservePublicFacet,
+  });
+
+  await assertReserveState(
+    reserveTracker,
     'initial',
     reserveInitialState(run.makeEmpty()),
   );
   let shortfallBalance = 0n;
 
-  const aethVaultMetrics = await vaultManagerMetricsTracker(
-    t,
-    aethCollateralManager,
-  );
-  await aethVaultMetrics.assertInitial({
+  await collateralManagerTracker.assertInitial({
     // present
     numActiveVaults: 0,
     numLiquidatingVaults: 0,
@@ -293,7 +293,7 @@ test('Auction sells all collateral w/shortfall', async t => {
   await assertVaultDebtSnapshot(t, aliceNotifier, aliceWantMinted);
 
   let totalDebt = 5250n;
-  await aethVaultMetrics.assertChange({
+  await collateralManagerTracker.assertChange({
     numActiveVaults: 1,
     totalCollateral: { value: 1000n },
     totalDebt: { value: totalDebt },
@@ -306,12 +306,13 @@ test('Auction sells all collateral w/shortfall', async t => {
   // Alice reduce collateral by 300. That leaves her at 700 * 10 > 1.05 * 5000.
   // Prices will drop from 10 to 7, she'll be liquidated: 700 * 7 < 1.05 * 5000.
   const collateralDecrement = aeth.make(300n);
-  const aliceReduceCollateralSeat = await E(zoe).offer(
-    E(aliceVault).makeAdjustBalancesInvitation(),
-    harden({
+  const aliceReduceCollateralSeat = await adjustVault({
+    t,
+    vault: aliceVault,
+    proposal: {
       want: { Collateral: collateralDecrement },
-    }),
-  );
+    },
+  });
   await E(aliceReduceCollateralSeat).getOfferResult();
 
   trace('alice ');
@@ -319,7 +320,7 @@ test('Auction sells all collateral w/shortfall', async t => {
 
   await assertVaultDebtSnapshot(t, aliceNotifier, aliceWantMinted);
   trace(t, 'alice reduce collateral');
-  await aethVaultMetrics.assertChange({
+  await collateralManagerTracker.assertChange({
     totalCollateral: { value: 700n },
   });
 
@@ -339,7 +340,7 @@ test('Auction sells all collateral w/shortfall', async t => {
   );
   let currentTime = now1;
 
-  await aethVaultMetrics.assertChange({
+  await collateralManagerTracker.assertChange({
     lockedQuote: makeRatioFromAmounts(
       aeth.make(1_000_000n),
       run.make(7_000_000n),
@@ -353,8 +354,7 @@ test('Auction sells all collateral w/shortfall', async t => {
 
   await assertVaultState(t, aliceNotifier, Phase.LIQUIDATED);
   trace(t, 'alice liquidated', currentTime);
-  totalDebt += 30n;
-  await aethVaultMetrics.assertChange({
+  await collateralManagerTracker.assertChange({
     numActiveVaults: 0,
     numLiquidatingVaults: 1,
     liquidatingCollateral: { value: 700n },
@@ -363,11 +363,11 @@ test('Auction sells all collateral w/shortfall', async t => {
   });
 
   shortfallBalance += 2065n;
-  await m.assertChange({
+  await reserveTracker.assertChange({
     shortfallBalance: { value: shortfallBalance },
   });
 
-  await aethVaultMetrics.assertChange({
+  await collateralManagerTracker.assertChange({
     liquidatingDebt: { value: 0n },
     liquidatingCollateral: { value: 0n },
     totalCollateral: { value: 0n },
diff --git a/packages/inter-protocol/test/liquidationVisibility/tools.js b/packages/inter-protocol/test/liquidationVisibility/tools.js
index 905dd5ecdb8..0fed62186ad 100644
--- a/packages/inter-protocol/test/liquidationVisibility/tools.js
+++ b/packages/inter-protocol/test/liquidationVisibility/tools.js
@@ -8,6 +8,7 @@ import { eventLoopIteration } from '@agoric/internal/src/testing-utils.js';
 import { TimeMath } from '@agoric/time';
 import { subscribeEach } from '@agoric/notifier';
 import '../../src/vaultFactory/types.js';
+import exp from 'constants';
 import { withAmountUtils } from '../supports.js';
 import {
   getRunFromFaucet,
@@ -285,6 +286,52 @@ export const openVault = async ({
   );
 };
 
+/**
+ * @typedef {object} AdjustVaultParams
+ * @property {object} t
+ * @property {Vault} vault
+ * @property {{
+ *   want: [
+ *     {
+ *       Collateral: Amount<'nat'>;
+ *       Minted: Amount<'nat'>;
+ *     },
+ *   ];
+ *   give: [
+ *     {
+ *       Collateral: Amount<'nat'>;
+ *       Minted: Amount<'nat'>;
+ *     },
+ *   ];
+ * }} proposal
+ * @property {{
+ *   want: [
+ *     {
+ *       Collateral: Payment;
+ *       Minted: Payment;
+ *     },
+ *   ];
+ *   give: [
+ *     {
+ *       Collateral: Payment;
+ *       Minted: Payment;
+ *     },
+ *   ];
+ * }} [payment]
+ */
+
+/**
+ * @param {AdjustVaultParams} adjustVaultParams
+ * @returns {Promise<UserSeat>}
+ */
+export const adjustVault = async ({ t, vault, proposal, payment }) => {
+  return E(t.context.zoe).offer(
+    E(vault).makeAdjustBalancesInvitation(),
+    harden(proposal),
+    payment,
+  );
+};
+
 /**
  * @typedef {object} GetTrackerParams
  * @property {any} t
@@ -294,8 +341,8 @@ export const openVault = async ({
 
 /**
  * @typedef {object} Trackers
- * @property {object | undefined} reserveTracker
- * @property {object | undefined} collateralManagerTracker
+ * @property {object} [reserveTracker]
+ * @property {object} [collateralManagerTracker]
  */
 
 /**
@@ -308,7 +355,7 @@ export const getMetricTrackers = async ({
   reservePublicFacet,
 }) => {
   /** @type {Trackers} */
-  const trackers = harden({});
+  const trackers = {};
   if (reservePublicFacet) {
     const metricsTopic = await E.get(E(reservePublicFacet).getPublicTopics())
       .metrics;
@@ -322,7 +369,7 @@ export const getMetricTrackers = async ({
     );
   }
 
-  return trackers;
+  return harden(trackers);
 };
 
 export const getBookDataTracker = async (t, auctioneerPublicFacet, brand) => {