diff --git a/itest/lnd_sweep_test.go b/itest/lnd_sweep_test.go
index 5d76557972..e7710f3c2a 100644
--- a/itest/lnd_sweep_test.go
+++ b/itest/lnd_sweep_test.go
@@ -771,24 +771,24 @@ func testSweepHTLCs(ht *lntest.HarnessTest) {
 	// Bob needs two more wallet utxos:
 	// - when sweeping anchors, he needs one utxo for each sweep.
 	// - when sweeping HTLCs, he needs one utxo for each sweep.
-	ht.FundCoins(btcutil.SatoshiPerBitcoin, bob)
-	ht.FundCoins(btcutil.SatoshiPerBitcoin, bob)
+	numUTXOs := 2
 
 	// Bob should have enough wallet UTXOs here to sweep the HTLC in the
 	// end of this test. However, due to a known issue, Bob's wallet may
 	// report there's no UTXO available. For details,
 	// - https://github.com/lightningnetwork/lnd/issues/8786
 	//
-	// TODO(yy): remove this step once the issue is resolved.
-	ht.FundCoins(btcutil.SatoshiPerBitcoin, bob)
+	// TODO(yy): remove this extra UTXO once the issue is resolved.
+	numUTXOs++
 
 	// For neutrino backend, we need two more UTXOs for Bob to create his
 	// sweeping txns.
 	if ht.IsNeutrinoBackend() {
-		ht.FundCoins(btcutil.SatoshiPerBitcoin, bob)
-		ht.FundCoins(btcutil.SatoshiPerBitcoin, bob)
+		numUTXOs += 2
 	}
 
+	ht.FundNumCoins(bob, numUTXOs)
+
 	// Subscribe the invoices.
 	stream1 := carol.RPC.SubscribeSingleInvoice(payHashSettled[:])
 	stream2 := carol.RPC.SubscribeSingleInvoice(payHashHold[:])
diff --git a/lntest/harness.go b/lntest/harness.go
index 82adbd9891..8e9e6310ce 100644
--- a/lntest/harness.go
+++ b/lntest/harness.go
@@ -1379,6 +1379,40 @@ func (h *HarnessTest) FundCoinsP2TR(amt btcutil.Amount,
 	h.fundCoins(amt, target, lnrpc.AddressType_TAPROOT_PUBKEY, true)
 }
 
+// FundNumCoins attempts to send the given number of UTXOs from the internal
+// mining node to the targeted lightning node using a P2WKH address. Each UTXO
+// has an amount of 1 BTC. 1 blocks are mined to confirm the tx.
+func (h *HarnessTest) FundNumCoins(hn *node.HarnessNode, num int) {
+	// Get the initial balance first.
+	resp := hn.RPC.WalletBalance()
+	initialBalance := btcutil.Amount(resp.ConfirmedBalance)
+
+	const fundAmount = 1 * btcutil.SatoshiPerBitcoin
+
+	// Send out the outputs from the miner.
+	for i := 0; i < num; i++ {
+		h.createAndSendOutput(
+			hn, fundAmount, lnrpc.AddressType_WITNESS_PUBKEY_HASH,
+		)
+	}
+
+	// Wait for ListUnspent to show the correct number of unconfirmed
+	// UTXOs.
+	//
+	// Since neutrino doesn't support unconfirmed outputs, skip this check.
+	if !h.IsNeutrinoBackend() {
+		h.AssertNumUTXOsUnconfirmed(hn, num)
+	}
+
+	// Mine a block to confirm the transactions.
+	h.MineBlocksAndAssertNumTxes(1, num)
+
+	// Now block until the wallet have fully synced up.
+	totalAmount := btcutil.Amount(fundAmount * num)
+	expectedBalance := initialBalance + totalAmount
+	h.WaitForBalanceConfirmed(hn, expectedBalance)
+}
+
 // completePaymentRequestsAssertStatus sends payments from a node to complete
 // all payment requests. This function does not return until all payments
 // have reached the specified status.