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diff --git a/packages/taler-integrationtests/src/test-payment-fault.ts b/packages/taler-integrationtests/src/test-payment-fault.ts
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+++ b/packages/taler-integrationtests/src/test-payment-fault.ts
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+/*
+ 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/>
+ */
+
+/**
+ * Sample fault injection test.
+ */
+
+/**
+ * Imports.
+ */
+import {
+  runTest,
+  GlobalTestState,
+  MerchantService,
+  ExchangeService,
+  setupDb,
+  BankService,
+  WalletCli,
+} from "./harness";
+import { FaultInjectedExchangeService, FaultInjectionRequestContext, FaultInjectionResponseContext } from "./faultInjection";
+import { CoreApiResponse } from "taler-wallet-core/lib/walletCoreApiHandler";
+
+/**
+ * Run test for basic, bank-integrated withdrawal.
+ */
+runTest(async (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,
+    suggestedExchange: "http://localhost:8091/",
+    suggestedExchangePayto: "payto://x-taler-bank/MyExchange",
+  });
+
+  await bank.start();
+
+  await bank.pingUntilAvailable();
+
+  const exchange = ExchangeService.create(t, {
+    name: "testexchange-1",
+    currency: "TESTKUDOS",
+    httpPort: 8081,
+    database: db.connStr,
+  });
+
+  await exchange.setupTestBankAccount(bank, "1", "MyExchange", "x");
+
+  await exchange.start();
+  await exchange.pingUntilAvailable();
+
+  const faultyExchange = new FaultInjectedExchangeService(t, exchange, 8091);
+
+  // Print all requests to the exchange
+  faultyExchange.faultProxy.addFault({
+    modifyRequest(ctx: FaultInjectionRequestContext) {
+      console.log("got request", ctx);
+    },
+    modifyResponse(ctx: FaultInjectionResponseContext) {
+      console.log("got response", ctx);
+    }
+  });
+
+  const merchant = await MerchantService.create(t, {
+    name: "testmerchant-1",
+    currency: "TESTKUDOS",
+    httpPort: 8083,
+    database: db.connStr,
+  });
+
+  merchant.addExchange(faultyExchange);
+
+  await merchant.start();
+  await merchant.pingUntilAvailable();
+
+  await merchant.addInstance({
+    id: "default",
+    name: "Default Instance",
+    paytoUris: [`payto://x-taler-bank/merchant-default`],
+  });
+
+  console.log("setup done!");
+
+  const wallet = new WalletCli(t);
+
+  // Create withdrawal operation
+
+  const user = await bank.createRandomBankUser();
+  const wop = await bank.createWithdrawalOperation(user, "TESTKUDOS:20");
+
+  // Hand it to the wallet
+
+  const r1 = await wallet.apiRequest("getWithdrawalDetailsForUri", {
+    talerWithdrawUri: wop.taler_withdraw_uri,
+  });
+  t.assertTrue(r1.type === "response");
+
+  await wallet.runPending();
+
+  // Confirm it
+
+  await bank.confirmWithdrawalOperation(user, wop);
+
+  // Withdraw
+
+  const r2 = await wallet.apiRequest("acceptBankIntegratedWithdrawal", {
+    exchangeBaseUrl: faultyExchange.baseUrl,
+    talerWithdrawUri: wop.taler_withdraw_uri,
+  });
+  t.assertTrue(r2.type === "response");
+  await wallet.runUntilDone();
+
+  // Check balance
+
+  const balApiResp = await wallet.apiRequest("getBalances", {});
+  t.assertTrue(balApiResp.type === "response");
+
+  // Set up order.
+
+  const orderResp = await merchant.createOrder("default", {
+    order: {
+      summary: "Buy me!",
+      amount: "TESTKUDOS:5",
+      fulfillment_url: "taler://fulfillment-success/thx",
+    },
+  });
+
+  let orderStatus = await merchant.queryPrivateOrderStatus(
+    "default",
+    orderResp.order_id,
+  );
+
+  t.assertTrue(orderStatus.order_status === "unpaid");
+
+  // Make wallet pay for the order
+
+  let apiResp: CoreApiResponse;
+
+  apiResp = await wallet.apiRequest("preparePay", {
+    talerPayUri: orderStatus.taler_pay_uri,
+  });
+  t.assertTrue(apiResp.type === "response");
+
+  const proposalId = (apiResp.result as any).proposalId;
+
+  await wallet.runPending();
+
+  // Drop 10 responses from the exchange.
+  let faultCount = 0;
+  faultyExchange.faultProxy.addFault({
+    modifyResponse(ctx: FaultInjectionResponseContext) {
+      if (faultCount < 10) {
+        faultCount++;
+        ctx.dropResponse = true;
+      }
+    }
+  });
+
+  // confirmPay won't work, as the exchange is unreachable
+
+  apiResp = await wallet.apiRequest("confirmPay", {
+    // FIXME: should be validated, don't cast!
+    proposalId: proposalId,
+  });
+  t.assertTrue(apiResp.type === "error");
+
+  await wallet.runUntilDone();
+
+  // Check if payment was successful.
+
+  orderStatus = await merchant.queryPrivateOrderStatus(
+    "default",
+    orderResp.order_id,
+  );
+
+  t.assertTrue(orderStatus.order_status === "paid");
+});