diff --git a/tapchannel/aux_invoice_manager_test.go b/tapchannel/aux_invoice_manager_test.go
index b8d55c1e2..204be247e 100644
--- a/tapchannel/aux_invoice_manager_test.go
+++ b/tapchannel/aux_invoice_manager_test.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"crypto/sha256"
 	"fmt"
+	"math/big"
 	"testing"
 	"time"
 
@@ -11,6 +12,7 @@ import (
 	"github.com/lightninglabs/taproot-assets/asset"
 	"github.com/lightninglabs/taproot-assets/fn"
 	"github.com/lightninglabs/taproot-assets/rfq"
+	"github.com/lightninglabs/taproot-assets/rfqmath"
 	"github.com/lightninglabs/taproot-assets/rfqmsg"
 	"github.com/lightningnetwork/lnd/lnrpc"
 	"github.com/lightningnetwork/lnd/lnwire"
@@ -27,6 +29,8 @@ const (
 var (
 	// The node ID to be used for the RFQ peer.
 	testNodeID = route.Vertex{1, 2, 3}
+
+	assetRate = big.NewInt(1_000_000)
 )
 
 // mockRfqManager mocks the interface of the rfq manager required by the aux
@@ -139,8 +143,10 @@ func (m *mockHtlcModifierProperty) HtlcModifier(ctx context.Context,
 		quote, ok := m.rfqMap[rfqID.Scid()]
 		require.True(m.t, ok)
 
+		assetRate := lnwire.MilliSatoshi(quote.AssetRate.ToUint64())
+
 		assetUnits := lnwire.MilliSatoshi(htlc.Amounts.Val.Sum())
-		assetValueMsat := assetUnits * quote.AskPrice
+		assetValueMsat := assetUnits * assetRate
 
 		acceptedMsat := lnwire.MilliSatoshi(0)
 		for _, htlc := range r.Invoice.Htlcs {
@@ -148,7 +154,7 @@ func (m *mockHtlcModifierProperty) HtlcModifier(ctx context.Context,
 		}
 
 		marginHtlcs := lnwire.MilliSatoshi(len(r.Invoice.Htlcs) + 1)
-		marginMsat := marginHtlcs * quote.AskPrice
+		marginMsat := marginHtlcs * assetRate
 
 		totalMsatIn := marginMsat + assetValueMsat + acceptedMsat
 
@@ -240,8 +246,11 @@ func TestAuxInvoiceManager(t *testing.T) {
 			},
 			buyQuotes: rfq.BuyAcceptMap{
 				dummyRfqID(31).Scid(): {
-					Peer:     testNodeID,
-					AskPrice: 1_000_000,
+					Peer: testNodeID,
+					AssetRate: rfqmath.FixedPoint[rfqmath.BigInt]{
+						Coefficient: rfqmath.NewBigInt(assetRate),
+						Scale:       0,
+					},
 				},
 			},
 		},
@@ -270,8 +279,11 @@ func TestAuxInvoiceManager(t *testing.T) {
 			},
 			buyQuotes: rfq.BuyAcceptMap{
 				dummyRfqID(31).Scid(): {
-					Peer:     testNodeID,
-					AskPrice: 500_000,
+					Peer: testNodeID,
+					AssetRate: rfqmath.FixedPoint[rfqmath.BigInt]{
+						Coefficient: rfqmath.NewBigInt(assetRate),
+						Scale:       0,
+					},
 				},
 			},
 		},
@@ -455,7 +467,7 @@ func genBuyQuotes(t *rapid.T, rfqMap rfq.BuyAcceptMap, units, amtMsat uint64,
 	scid rfqmsg.ID) {
 
 	var peer route.Vertex
-	askPrice := lnwire.MilliSatoshi(0)
+	askPrice := assetRate
 
 	// Introduce a 1/8 chance that the quote's peerID is not correct.
 	noPeerMatch := rapid.Uint16().Draw(t, "nodeID_mismatch_probability")
@@ -469,17 +481,23 @@ func genBuyQuotes(t *rapid.T, rfqMap rfq.BuyAcceptMap, units, amtMsat uint64,
 	// a random total asset value.
 	noValueMatch := rapid.Uint16().Draw(t, "no_asset_value_match")
 	if noValueMatch%5 == 0 {
-		askPrice = lnwire.MilliSatoshi(
-			rapid.Uint64Range(
-				0, 250_000,
-			).Draw(t, "asset_msat_value"))
+		askPrice = big.NewInt(
+			rapid.Int64Range(0, 250_000).Draw(
+				t, "asset_msat_value",
+			),
+		)
 	} else {
-		askPrice = lnwire.MilliSatoshi(amtMsat / units)
+		bigAmtMsat := big.NewInt(int64(amtMsat))
+		bigUnits := big.NewInt(int64(units))
+		askPrice.Div(bigAmtMsat, bigUnits)
 	}
 
 	rfqMap[scid.Scid()] = rfqmsg.BuyAccept{
-		Peer:     peer,
-		AskPrice: askPrice,
+		Peer: peer,
+		AssetRate: rfqmath.FixedPoint[rfqmath.BigInt]{
+			Coefficient: rfqmath.NewBigInt(askPrice),
+			Scale:       0,
+		},
 	}
 }