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diff --git a/packages/taler-harness/src/integrationtests/test-withdrawal-conversion.ts b/packages/taler-harness/src/integrationtests/test-withdrawal-conversion.ts
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+++ b/packages/taler-harness/src/integrationtests/test-withdrawal-conversion.ts
@@ -0,0 +1,304 @@
+/*
+ This file is part of GNU Taler
+ (C) 2020 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * Imports.
+ */
+import {
+  AbsoluteTime,
+  AmountString,
+  Amounts,
+  Duration,
+  Logger,
+  TalerBankConversionApi,
+  TalerCorebankApiClient,
+  TransactionType,
+  WireGatewayApiClient,
+  WithdrawalType,
+  j2s,
+} from "@gnu-taler/taler-util";
+import { WalletApiOperation } from "@gnu-taler/taler-wallet-core";
+import * as http from "node:http";
+import { defaultCoinConfig } from "../harness/denomStructures.js";
+import {
+  BankService,
+  ExchangeService,
+  GlobalTestState,
+  MerchantService,
+  generateRandomPayto,
+  setupDb,
+} from "../harness/harness.js";
+import { createWalletDaemonWithClient } from "../harness/helpers.js";
+
+const logger = new Logger("test-withdrawal-conversion.ts");
+
+interface TestfakeConversionService {
+  stop: () => void;
+}
+
+function splitInTwoAt(s: string, separator: string): [string, string] {
+  const idx = s.indexOf(separator);
+  if (idx === -1) {
+    return [s, ""];
+  }
+  return [s.slice(0, idx), s.slice(idx + 1)];
+}
+
+/**
+ * Testfake for the kyc service that the exchange talks to.
+ */
+async function runTestfakeConversionService(): Promise<TestfakeConversionService> {
+  const server = http.createServer((req, res) => {
+    const requestUrl = req.url!;
+    logger.info(`kyc: got ${req.method} request, ${requestUrl}`);
+
+    const [path, query] = splitInTwoAt(requestUrl, "?");
+
+    const qp = new URLSearchParams(query);
+
+    if (path === "/config") {
+      res.writeHead(200, { "Content-Type": "application/json" });
+      res.end(
+        JSON.stringify({
+          version: "0:0:0",
+          name: "taler-conversion-info",
+          regional_currency: "FOO",
+          fiat_currency: "BAR",
+          regional_currency_specification: {
+            alt_unit_names: {},
+            name: "FOO",
+            num_fractional_input_digits: 2,
+            num_fractional_normal_digits: 2,
+            num_fractional_trailing_zero_digits: 2,
+          },
+          fiat_currency_specification: {
+            alt_unit_names: {},
+            name: "BAR",
+            num_fractional_input_digits: 2,
+            num_fractional_normal_digits: 2,
+            num_fractional_trailing_zero_digits: 2,
+          },
+          conversion_rate: {
+            cashin_fee: "A:1" as AmountString,
+            cashin_min_amount: "A:0.1" as AmountString,
+            cashin_ratio: "1",
+            cashin_rounding_mode: "zero",
+            cashin_tiny_amount: "A:1" as AmountString,
+            cashout_fee: "A:1" as AmountString,
+            cashout_min_amount: "A:0.1" as AmountString,
+            cashout_ratio: "1",
+            cashout_rounding_mode: "zero",
+            cashout_tiny_amount: "A:1" as AmountString,
+          }
+        } satisfies TalerBankConversionApi.IntegrationConfig),
+      );
+    } else if (path === "/cashin-rate") {
+      res.writeHead(200, { "Content-Type": "application/json" });
+      res.end(
+        JSON.stringify({
+          amount_debit: "FOO:123",
+          amount_credit: "BAR:123",
+        }),
+      );
+    } else {
+      res.writeHead(400, { "Content-Type": "application/json" });
+      res.end(JSON.stringify({ code: 1, message: "bad request" }));
+    }
+  });
+  await new Promise<void>((resolve, reject) => {
+    server.listen(8071, () => resolve());
+  });
+  return {
+    stop() {
+      server.close();
+    },
+  };
+}
+
+/**
+ * Test for currency conversion during manual withdrawal.
+ */
+export async function runWithdrawalConversionTest(t: GlobalTestState) {
+  // Set up test environment
+
+  const db = await setupDb(t);
+
+  const bank = await BankService.create(t, {
+    allowRegistrations: true,
+    currency: "TESTKUDOS",
+    database: db.connStr,
+    httpPort: 8082,
+  });
+
+  const exchange = ExchangeService.create(t, {
+    name: "testexchange-1",
+    currency: "TESTKUDOS",
+    httpPort: 8081,
+    database: db.connStr,
+  });
+
+  const merchant = await MerchantService.create(t, {
+    name: "testmerchant-1",
+    currency: "TESTKUDOS",
+    httpPort: 8083,
+    database: db.connStr,
+  });
+
+  const exchangeBankAccount = await bank.createExchangeAccount(
+    "myexchange",
+    "x",
+  );
+  exchangeBankAccount.conversionUrl = "http://localhost:8071/";
+  await exchange.addBankAccount("1", exchangeBankAccount);
+
+  await bank.start();
+
+  await bank.pingUntilAvailable();
+
+  exchange.addOfferedCoins(defaultCoinConfig);
+
+  await exchange.start();
+  await exchange.pingUntilAvailable();
+
+  merchant.addExchange(exchange);
+  await merchant.start();
+  await merchant.pingUntilAvailable();
+
+  await merchant.addInstanceWithWireAccount({
+    id: "default",
+    name: "Default Instance",
+    paytoUris: [generateRandomPayto("merchant-default")],
+    defaultWireTransferDelay: Duration.toTalerProtocolDuration(
+      Duration.fromSpec({ minutes: 1 }),
+    ),
+  });
+
+  await merchant.addInstanceWithWireAccount({
+    id: "minst1",
+    name: "minst1",
+    paytoUris: [generateRandomPayto("minst1")],
+    defaultWireTransferDelay: Duration.toTalerProtocolDuration(
+      Duration.fromSpec({ minutes: 1 }),
+    ),
+  });
+
+  const { walletClient, walletService } = await createWalletDaemonWithClient(
+    t,
+    { name: "wallet" },
+  );
+
+  await runTestfakeConversionService();
+
+  // Create a withdrawal operation
+
+  const bankAccessApiClient = new TalerCorebankApiClient(
+    bank.corebankApiBaseUrl,
+  );
+
+  const user = await bankAccessApiClient.createRandomBankUser();
+
+  await walletClient.call(WalletApiOperation.AddExchange, {
+    exchangeBaseUrl: exchange.baseUrl,
+  });
+
+  const infoRes = await walletClient.call(
+    WalletApiOperation.GetWithdrawalDetailsForAmount,
+    {
+      exchangeBaseUrl: exchange.baseUrl,
+      amount: "TESTKUDOS:20" as AmountString,
+    },
+  );
+
+  console.log(`withdrawal details: ${j2s(infoRes)}`);
+
+  const checkTransferAmount = infoRes.withdrawalAccountsList[0].transferAmount;
+  t.assertTrue(checkTransferAmount != null);
+  t.assertAmountEquals(checkTransferAmount, "FOO:123");
+
+  const tStart = AbsoluteTime.now();
+
+  logger.info("starting AcceptManualWithdrawal request");
+  // We expect this to return immediately.
+
+  const wres = await walletClient.call(
+    WalletApiOperation.AcceptManualWithdrawal,
+    {
+      exchangeBaseUrl: exchange.baseUrl,
+      amount: "TESTKUDOS:10" as AmountString,
+    },
+  );
+
+  logger.info("AcceptManualWithdrawal finished");
+  logger.info(`result: ${j2s(wres)}`);
+
+  const acceptedTransferAmount = wres.withdrawalAccountsList[0].transferAmount;
+  t.assertTrue(acceptedTransferAmount != null);
+
+  t.assertAmountEquals(acceptedTransferAmount, "FOO:123");
+
+  const txInfo = await walletClient.call(
+    WalletApiOperation.GetTransactionById,
+    {
+      transactionId: wres.transactionId,
+    },
+  );
+
+  t.assertDeepEqual(txInfo.type, TransactionType.Withdrawal);
+  t.assertDeepEqual(
+    txInfo.withdrawalDetails.type,
+    WithdrawalType.ManualTransfer,
+  );
+  t.assertTrue(!!txInfo.withdrawalDetails.exchangeCreditAccountDetails);
+  t.assertDeepEqual(
+    txInfo.withdrawalDetails.exchangeCreditAccountDetails[0].transferAmount,
+    "FOO:123",
+  );
+
+  // Check that the request did not go into long-polling.
+  const duration = AbsoluteTime.difference(tStart, AbsoluteTime.now());
+  if (typeof duration.d_ms !== "number" || duration.d_ms > 5 * 1000) {
+    throw Error("withdrawal took too long (longpolling issue)");
+  }
+
+  const reservePub: string = wres.reservePub;
+
+  const wireGatewayApiClient = new WireGatewayApiClient(
+    exchangeBankAccount.wireGatewayApiBaseUrl,
+    {
+      auth: {
+        username: exchangeBankAccount.accountName,
+        password: exchangeBankAccount.accountPassword,
+      },
+    },
+  );
+
+  await wireGatewayApiClient.adminAddIncoming({
+    amount: "TESTKUDOS:10",
+    debitAccountPayto: user.accountPaytoUri,
+    reservePub: reservePub,
+  });
+
+  await exchange.runWirewatchOnce();
+
+  await walletClient.call(WalletApiOperation.TestingWaitTransactionsFinal, {});
+
+  // Check balance
+
+  const balResp = await walletClient.call(WalletApiOperation.GetBalances, {});
+  t.assertAmountEquals("TESTKUDOS:9.72", balResp.balances[0].available);
+}
+
+runWithdrawalConversionTest.suites = ["wallet"];