diff --git a/lntest/harness.go b/lntest/harness.go
index d31c5592..1a6ed867 100644
--- a/lntest/harness.go
+++ b/lntest/harness.go
@@ -1104,12 +1104,26 @@ func (n *NetworkHarness) DumpLogs(node *HarnessNode) (string, error) {
 }
 
 // SendCoins attempts to send amt satoshis from the internal mining node to the
-// targeted lightning node using a P2WKH address.
+// targeted lightning node using a P2WKH address. 6 blocks are mined after in
+// order to confirm the transaction.
 func (n *NetworkHarness) SendCoins(ctx context.Context, amt btcutil.Amount,
 	target *HarnessNode) error {
 
 	return n.sendCoins(
 		ctx, amt, target, lnrpc.NewAddressRequest_WITNESS_PUBKEY_HASH,
+		true,
+	)
+}
+
+// SendCoinsUnconfirmed sends coins from the internal mining node to the target
+// lightning node using a P2WPKH address. No blocks are mined after, so the
+// transaction remains unconfirmed.
+func (n *NetworkHarness) SendCoinsUnconfirmed(ctx context.Context,
+	amt btcutil.Amount, target *HarnessNode) error {
+
+	return n.sendCoins(
+		ctx, amt, target, lnrpc.NewAddressRequest_WITNESS_PUBKEY_HASH,
+		false,
 	)
 }
 
@@ -1120,14 +1134,16 @@ func (n *NetworkHarness) SendCoinsNP2WKH(ctx context.Context,
 
 	return n.sendCoins(
 		ctx, amt, target, lnrpc.NewAddressRequest_NESTED_PUBKEY_HASH,
+		true,
 	)
 }
 
 // sendCoins attempts to send amt satoshis from the internal mining node to the
-// targeted lightning node.
+// targeted lightning node. The confirmed boolean indicates whether the
+// transaction that pays to the target should confirm.
 func (n *NetworkHarness) sendCoins(ctx context.Context, amt btcutil.Amount,
-	target *HarnessNode,
-	addrType lnrpc.NewAddressRequest_AddressType) error {
+	target *HarnessNode, addrType lnrpc.NewAddressRequest_AddressType,
+	confirmed bool) error {
 
 	balReq := &lnrpc.WalletBalanceRequest{}
 	initialBalance, err := target.WalletBalance(ctx, balReq)
@@ -1165,8 +1181,17 @@ func (n *NetworkHarness) sendCoins(ctx context.Context, amt btcutil.Amount,
 		return err
 	}
 
-	// Finally, generate 6 new blocks to ensure the output gains a
-	// sufficient number of confirmations.
+	// If the transaction should remain unconfirmed, then we'll wait until
+	// the target node's unconfirmed balance reflects the expected balance
+	// and exit.
+	if !confirmed {
+		expectedBalance := initialBalance.UnconfirmedBalance + int64(amt)
+		return target.WaitForBalance(expectedBalance, false)
+	}
+
+	// Otherwise, we'll generate 6 new blocks to ensure the output gains a
+	// sufficient number of confirmations and wait for the balance to
+	// reflect what's expected.
 	if _, err := n.Miner.Node.Generate(6); err != nil {
 		return err
 	}