diff --git a/packages/inter-protocol/test/test-clientSupport.js b/packages/inter-protocol/test/test-clientSupport.js
index a841b4d682f6..2c64d390012e 100644
--- a/packages/inter-protocol/test/test-clientSupport.js
+++ b/packages/inter-protocol/test/test-clientSupport.js
@@ -7,6 +7,7 @@ import { withAmountUtils } from './supports.js';
 
 const ist = withAmountUtils(makeIssuerKit('IST'));
 const atom = withAmountUtils(makeIssuerKit('ATOM'));
+const stAtom = withAmountUtils(makeIssuerKit('stATOM'));
 
 // uses actual Brand objects instead of BoardRemote to make the test output more legible
 /**
@@ -18,6 +19,7 @@ const agoricNames = {
   brand: {
     IST: /** @type {any} */ (ist.brand),
     ATOM: /** @type {any} */ (atom.brand),
+    stATOM: /** @type {any} */ (stAtom.brand),
   },
   vbankAsset: {
     uist: {
@@ -36,6 +38,14 @@ const agoricNames = {
       issuerName: 'ATOM',
       proposedName: 'ATOM',
     },
+    'ibc/sttoyatom': {
+      denom: 'ibc/sttoyatom',
+      brand: /** @type {any} */ (stAtom.brand),
+      displayInfo: { assetKind: 'nat', decimalPlaces: 6 },
+      issuer: /** @type {any} */ ({}),
+      issuerName: 'stATOM',
+      proposedName: 'stATOM',
+    },
   },
 };
 
@@ -125,6 +135,34 @@ test('Offers.auction.Bid', async t => {
     'optional want',
   );
 
+  const offerPrice2 = makeRatio(7n, ist.brand, 1n, stAtom.brand);
+  t.deepEqual(
+    Offers.auction.Bid(agoricNames, {
+      offerId: 'by-price3',
+      maxBuy: '10_000stATOM',
+      wantMinimum: '1.23stATOM',
+      give: '4.56IST',
+      price,
+    }),
+    {
+      id: 'by-price3',
+      invitationSpec: {
+        source: 'agoricContract',
+        instancePath: ['auctioneer'],
+        callPipe: [['makeBidInvitation', [stAtom.brand]]],
+      },
+      proposal: {
+        give: { Bid: ist.make(4_560_000n) },
+        want: { Collateral: stAtom.make(1_230_000n) },
+      },
+      offerArgs: {
+        offerPrice: offerPrice2,
+        maxBuy: stAtom.make(10_000_000_000n),
+      },
+    },
+    'lowercase brand',
+  );
+
   t.throws(
     () =>
       // @ts-expect-error error checking test