diff --git a/packages/treasury/test/test-runLoC.js b/packages/treasury/test/test-runLoC.js
index 97de2033419c..9aa399e5d51f 100644
--- a/packages/treasury/test/test-runLoC.js
+++ b/packages/treasury/test/test-runLoC.js
@@ -4,13 +4,21 @@ import { test } from '@agoric/zoe/tools/prepare-test-env-ava.js';
 import { makeFakeVatAdmin } from '@agoric/zoe/tools/fakeVatAdmin.js';
 import { makeZoeKit } from '@agoric/zoe';
 import { E } from '@agoric/eventual-send';
-import { makeLoopback } from '@agoric/captp';
+import { Far, makeLoopback } from '@agoric/captp';
 import { resolve as metaResolve } from 'import-meta-resolve';
 import bundleSource from '@agoric/bundle-source';
-import { AmountMath } from '@agoric/ertp';
+import { AmountMath, AssetKind, makeIssuerKit } from '@agoric/ertp';
 // import { makeLoopback } from '@agoric/captp';
 
+/**
+ * @typedef { import('@agoric/eventual-send').Unpromise<T> } Unpromise<T>
+ * @template T
+ */
+/** @typedef {Unpromise<ReturnType<typeof import('@agoric/zoe/src/contracts/attestation/attestation.js').start>>} StartAttestationResult */
+/** @typedef {Unpromise<ReturnType<typeof import('../src/runLoC.js').start>>} StartLineOfCredit */
+
 const { assign, entries, fromEntries, keys, values } = Object;
+const { details: X } = assert;
 
 const mapValues = (obj, f) =>
   fromEntries(entries(obj).map(([p, v]) => [p, f(v)]));
@@ -23,12 +31,14 @@ const asset = async ref =>
 
 const contractRoots = {
   runLoC: '../src/runLoC.js',
+  attestation: '@agoric/zoe/src/contracts/attestation/attestation.js',
 };
 
 test.before(async t => {
   t.log('bundling...', contractRoots);
   const bundles = {
     runLoC: await bundleSource(await asset(contractRoots.runLoC)),
+    attestation: await bundleSource(await asset(contractRoots.attestation)),
   };
   t.log(
     'bundled:',
@@ -60,11 +70,100 @@ test('RUN mint access', async t => {
   assert.typeof(t.context, 'object');
   assert(t.context);
 
+  const { zoe, feeMintAccess } = await genesis();
+  t.true(!!zoe);
+  t.true(!!feeMintAccess);
+});
+
+const startAttestation = async (t, zoe) => {
+  const installation = await E(zoe).install(t.context.bundles.attestation);
+  const bldIssuerKit = makeIssuerKit(
+    'BLD',
+    AssetKind.NAT,
+    harden({
+      decimalPlaces: 6,
+    }),
+  );
+
+  /** @type {StartAttestationResult} */
+  const { publicFacet, creatorFacet } = await E(zoe).startInstance(
+    installation,
+    harden({ Underlying: bldIssuerKit.issuer }),
+    harden({
+      expiringAttName: 'BldAttGov',
+      returnableAttName: 'BldAttLoc',
+    }),
+  );
+  return { bldIssuerKit, publicFacet, creatorFacet };
+};
+
+const chainState = harden({
+  currentTime: 10n,
+  accounts: {
+    address1: {
+      total: 500n,
+      bonded: 200n,
+      locked: 10n,
+    },
+  },
+});
+
+/**
+ * @param {Brand} uBrand
+ */
+const makeStakeReporter = uBrand => {
+  const ubld = v => AmountMath.make(uBrand, v);
+  return Far('stakeReporter', {
+    /**
+     * @param { string } address
+     * @param { Brand } brand
+     */
+    getAccountState: (address, brand) => {
+      assert(brand === uBrand, X`unexpected brand: ${brand}`);
+      const account = chainState.accounts[address];
+      assert(account, X`no such account: ${address}`);
+      return harden({
+        ...mapValues(account, ubld),
+        currentTime: chainState.currentTime,
+      });
+    },
+  });
+};
+
+test('start attestation', async t => {
+  const { zoe } = await genesis();
+
+  const a = await startAttestation(t, zoe);
+  t.log('attestation start result', a);
+  const { brand: bldBrand } = a.bldIssuerKit;
+  const ubld = v => AmountMath.make(bldBrand, v);
+
+  a.creatorFacet.addAuthority(makeStakeReporter(bldBrand));
+
+  const attMaker = await E(a.creatorFacet).getAttMaker(
+    keys(chainState.accounts)[0],
+  );
+  const expiration = chainState.currentTime + 5n;
+  const att = await E(attMaker).makeAttestations(ubld(10n), expiration);
+  t.log('attestation', att);
+  const pmt = await att.returnable;
+  t.log({ pmt });
+  t.pass();
+});
+
+test('take out RUN line of credit', async t => {
+  assert.typeof(t.context, 'object');
+  assert(t.context);
+
   const { zoe, feeMintAccess, getJig } = await genesis();
   t.true(!!zoe);
   t.true(!!feeMintAccess);
+  const a = await startAttestation(t, zoe);
+  const { brand: bldBrand } = a.bldIssuerKit;
+  a.creatorFacet.addAuthority(makeStakeReporter(bldBrand));
 
   const installation = await E(zoe).install(t.context.bundles.runLoC);
+  /** @type {StartLineOfCredit} */
   const { publicFacet } = await E(zoe).startInstance(
     installation,
     undefined,
@@ -72,13 +171,25 @@ test('RUN mint access', async t => {
     harden({ feeMintAccess }),
   );
   /** @type {{ runBrand: Brand, runIssuer: Issuer }} */
-  const { runBrand, runIssuer } = getJig();
-  const lineOfCreditInvitation = await E(publicFacet).getInvitation();
-
+  const { runBrand } = getJig();
   /** @param { bigint } value */
   const run = value => AmountMath.make(runBrand, value);
-  const attAmt = run(0n); // @@TODO
-  const attPmt = await E(E(runIssuer).makeEmptyPurse()).withdraw(attAmt); // @@TODO
+
+  const lineOfCreditInvitation = await E(publicFacet).getInvitation();
+
+  /** @param { bigint } v */
+  const ubld = v => AmountMath.make(bldBrand, v);
+
+  const { returnable: attIssuer } = await E(a.publicFacet).getIssuers();
+  const addr = keys(chainState.accounts)[0];
+  const attMaker = await E(a.creatorFacet).getAttMaker(addr);
+  t.log({ addr, attMaker });
+
+  const expiration = chainState.currentTime + 1n;
+  const attPmt = await E.get(E(attMaker).makeAttestations(ubld(5n), expiration))
+    .returnable;
+  t.log({ attPmt });
+  const attAmt = await E(attIssuer).getAmountOf(attPmt);
 
   const seat = await E(zoe).offer(
     lineOfCreditInvitation,