diff --git a/internal/pkg/gateway/api_test.go b/internal/pkg/gateway/api_test.go
index 6a03cbda8ee..e4ab6058e41 100644
--- a/internal/pkg/gateway/api_test.go
+++ b/internal/pkg/gateway/api_test.go
@@ -682,7 +682,7 @@ func TestEndorse(t *testing.T) {
 				"g2": {{endorser: peer2Mock, height: 5}},     // msp2
 			},
 			localResponse: "different_response",
-			errString:     "rpc error: code = Aborted desc = failed to assemble transaction: ProposalResponsePayloads do not match",
+			errString:     "rpc error: code = Aborted desc = failed to assemble transaction: ProposalResponsePayloads do not match (base64): 'EhQaEgjIARoNbW9ja19yZXNwb25zZQ==' vs 'EhkaFwjIARoSZGlmZmVyZW50X3Jlc3BvbnNl'",
 		},
 		{
 			name: "discovery fails",
diff --git a/protoutil/txutils.go b/protoutil/txutils.go
index a19987dc9de..b3cbf2ac93c 100644
--- a/protoutil/txutils.go
+++ b/protoutil/txutils.go
@@ -9,6 +9,7 @@ package protoutil
 import (
 	"bytes"
 	"crypto/sha256"
+	b64 "encoding/base64"
 
 	"github.com/golang/protobuf/proto"
 	"github.com/hyperledger/fabric-protos-go/common"
@@ -202,7 +203,8 @@ func createTx(
 		}
 
 		if !bytes.Equal(a1, r.Payload) {
-			return nil, errors.New("ProposalResponsePayloads do not match")
+			return nil, errors.Errorf("ProposalResponsePayloads do not match (base64): '%s' vs '%s'",
+				b64.StdEncoding.EncodeToString(r.Payload), b64.StdEncoding.EncodeToString(a1))
 		}
 	}
 
diff --git a/protoutil/txutils_test.go b/protoutil/txutils_test.go
index a0e70e22d7e..37f09f4e4b9 100644
--- a/protoutil/txutils_test.go
+++ b/protoutil/txutils_test.go
@@ -10,6 +10,7 @@ import (
 	"encoding/hex"
 	"errors"
 	"strconv"
+	"strings"
 	"testing"
 
 	"github.com/golang/protobuf/proto"
@@ -175,14 +176,6 @@ func TestCreateSignedTx(t *testing.T) {
 		responses     []*pb.ProposalResponse
 		expectedError string
 	}{
-		// good responses, but different payloads
-		{
-			[]*pb.ProposalResponse{
-				{Payload: []byte("payload"), Response: &pb.Response{Status: int32(200)}},
-				{Payload: []byte("payload2"), Response: &pb.Response{Status: int32(200)}},
-			},
-			"ProposalResponsePayloads do not match",
-		},
 		// good response followed by bad response
 		{
 			[]*pb.ProposalResponse{
@@ -205,6 +198,16 @@ func TestCreateSignedTx(t *testing.T) {
 		require.EqualErrorf(t, err, nonMatchingTest.expectedError, "Expected non-matching response error '%v' for test %d", nonMatchingTest.expectedError, i)
 	}
 
+	// good responses, but different payloads
+	responses = []*pb.ProposalResponse{
+		{Payload: []byte("payload"), Response: &pb.Response{Status: int32(200)}},
+		{Payload: []byte("payload2"), Response: &pb.Response{Status: int32(200)}},
+	}
+	_, err = protoutil.CreateSignedTx(prop, signID, responses...)
+	if err == nil || strings.HasPrefix(err.Error(), "ProposalResponsePayloads do not match (base64):") == false {
+		require.FailNow(t, "Error is expected when response payloads do not match")
+	}
+
 	// no endorsement
 	responses = []*pb.ProposalResponse{{
 		Payload: []byte("payload"),