diff --git a/chain/actors/actor_multisig.go b/chain/actors/actor_multisig.go
index ce7e04dd7..765f13b4c 100644
--- a/chain/actors/actor_multisig.go
+++ b/chain/actors/actor_multisig.go
@@ -17,6 +17,7 @@ func init() {
 	cbor.RegisterCborType(MultiSigSigner{})
 	cbor.RegisterCborType(MultiSigSwapSignerParams{})
 	cbor.RegisterCborType(MultiSigChangeReqParams{})
+	cbor.RegisterCborType(MTransaction{})
 }
 
 type MultiSigActor struct{}
diff --git a/chain/actors/actor_multisig_test.go b/chain/actors/actor_multisig_test.go
index b9b70058f..57be8666c 100644
--- a/chain/actors/actor_multisig_test.go
+++ b/chain/actors/actor_multisig_test.go
@@ -1,15 +1,18 @@
 package actors_test
 
 import (
+	"context"
 	"testing"
 
 	cbor "github.com/ipfs/go-ipld-cbor"
 	"github.com/stretchr/testify/assert"
+	"go.opencensus.io/trace"
 
 	"github.com/filecoin-project/go-lotus/chain/actors"
 	"github.com/filecoin-project/go-lotus/chain/address"
 	"github.com/filecoin-project/go-lotus/chain/types"
 	"github.com/filecoin-project/go-lotus/chain/vm"
+	"github.com/filecoin-project/go-lotus/tracing"
 )
 
 func TestMultiSigCreate(t *testing.T) {
@@ -38,9 +41,15 @@ func ApplyOK(t testing.TB, ret *vm.ApplyRet) {
 }
 
 func TestMultiSigOps(t *testing.T) {
+	je := tracing.SetupJaegerTracing("test")
+	defer je.Flush()
+	ctx, span := trace.StartSpan(context.Background(), "/test-"+t.Name())
+	defer span.End()
+
 	var creatorAddr, sig1Addr, sig2Addr, outsideAddr address.Address
 	var multSigAddr address.Address
 	opts := []HarnessOpt{
+		HarnessCtx(ctx),
 		HarnessAddr(&creatorAddr, 10000),
 		HarnessAddr(&sig1Addr, 10000),
 		HarnessAddr(&sig2Addr, 10000),
@@ -54,14 +63,14 @@ func TestMultiSigOps(t *testing.T) {
 			}),
 	}
 
+	curVal := types.NewInt(2000)
 	h := NewHarness2(t, opts...)
 	{
-		sendVal := types.NewInt(2000)
-		ret, state := h.SendFunds(t, creatorAddr, multSigAddr, sendVal)
+		ret, state := h.SendFunds(t, creatorAddr, multSigAddr, curVal)
 		ApplyOK(t, ret)
 		ms, err := state.GetActor(multSigAddr)
 		assert.NoError(t, err)
-		assert.Equal(t, sendVal, ms.Balance)
+		assert.Equal(t, curVal, ms.Balance)
 	}
 
 	{
@@ -72,9 +81,21 @@ func TestMultiSigOps(t *testing.T) {
 				Value: sendVal,
 			})
 		ApplyOK(t, ret)
-		var txIdParam actors.MultiSigTxID
-		err := cbor.DecodeInto(ret.Return, &txIdParam.TxID)
+		var txIDParam actors.MultiSigTxID
+		err := cbor.DecodeInto(ret.Return, &txIDParam.TxID)
 		assert.NoError(t, err, "decoding txid")
+		ret, state := h.Invoke(t, sig1Addr, multSigAddr, actors.MultiSigMethods.Approve,
+			txIDParam)
+		ApplyOK(t, ret)
+		curVal = types.BigSub(curVal, sendVal)
+
+		outAct, err := state.GetActor(outsideAddr)
+		assert.NoError(t, err)
+		assert.Equal(t, sendVal, outAct.Balance)
+
+		msAct, err := state.GetActor(multSigAddr)
+		assert.NoError(t, err)
+		assert.Equal(t, curVal, msAct.Balance)
 	}
 
 }
diff --git a/chain/actors/harness2_test.go b/chain/actors/harness2_test.go
index abae41f4f..614e827d1 100644
--- a/chain/actors/harness2_test.go
+++ b/chain/actors/harness2_test.go
@@ -41,9 +41,10 @@ type Harness2 struct {
 	Stage  HarnessStage
 	Nonces map[address.Address]uint64
 
-	bs blockstore.Blockstore
-	vm *vm.VM
-	cs *store.ChainStore
+	ctx context.Context
+	bs  blockstore.Blockstore
+	vm  *vm.VM
+	cs  *store.ChainStore
 }
 
 var HarnessMinerFunds = types.NewInt(1000000)
@@ -99,20 +100,28 @@ func HarnessActor(actor *address.Address, creator *address.Address, code cid.Cid
 
 }
 
+func HarnessCtx(ctx context.Context) HarnessOpt {
+	return func(t testing.TB, h *Harness2) error {
+		h.ctx = ctx
+		return nil
+	}
+}
+
 func NewHarness2(t *testing.T, options ...HarnessOpt) *Harness2 {
 	h := &Harness2{
 		Stage:  HarnessPreInit,
 		Nonces: make(map[address.Address]uint64),
-	}
-	h.bs = bstore.NewBlockstore(dstore.NewMapDatastore())
-	h.HI = HarnessInit{
-		NAddrs: 1,
-		Miner:  blsaddr(0),
-		Addrs: map[address.Address]types.BigInt{
-			blsaddr(0): HarnessMinerFunds,
+		HI: HarnessInit{
+			NAddrs: 1,
+			Miner:  blsaddr(0),
+			Addrs: map[address.Address]types.BigInt{
+				blsaddr(0): HarnessMinerFunds,
+			},
 		},
-	}
 
+		ctx: context.Background(),
+		bs:  bstore.NewBlockstore(dstore.NewMapDatastore()),
+	}
 	for _, opt := range options {
 		err := opt(t, h)
 		if err != nil {
@@ -152,7 +161,7 @@ func (h *Harness2) Apply(t testing.TB, msg types.Message) (*vm.ApplyRet, *state.
 		h.Nonces[msg.From] = msg.Nonce + 1
 	}
 
-	ret, err := h.vm.ApplyMessage(context.TODO(), &msg)
+	ret, err := h.vm.ApplyMessage(h.ctx, &msg)
 	if err != nil {
 		t.Fatalf("Applying message: %+v", err)
 	}