diff --git a/itests/deals_invalid_utf8_label_test.go b/itests/deals_invalid_utf8_label_test.go
new file mode 100644
index 000000000..7a4e79150
--- /dev/null
+++ b/itests/deals_invalid_utf8_label_test.go
@@ -0,0 +1,78 @@
+package itests
+
+import (
+	"context"
+	"encoding/hex"
+	"testing"
+	"time"
+
+	"github.com/filecoin-project/go-state-types/builtin"
+	"github.com/filecoin-project/go-state-types/network"
+	"github.com/filecoin-project/lotus/chain/types"
+	"github.com/filecoin-project/lotus/itests/kit"
+	"github.com/stretchr/testify/require"
+)
+
+// The following function will generate and print out the hex encoding of PublishStorageDealsParams with a dealLabel with invalid utf8 encoding.
+// This is not possible with our current code structure, so this was run with a modified NewLabelFromString() function in go-state-types
+// The result is recorded in the function below for submission.
+//func generateInvalidDealProposal(t *testing.T) {
+//	ctx := context.Background()
+//
+//	kit.QuietMiningLogs()
+//
+//	client16, _, ens := kit.EnsembleMinimal(t, kit.MockProofs(), kit.GenesisNetworkVersion(network.Version16))
+//	ens.InterconnectAll().BeginMining(10 * time.Millisecond)
+//
+//	dealLabel, err := market.NewLabelFromString(string([]byte{0xde, 0xad, 0xbe, 0xef}))
+//	require.NoError(t, err)
+//
+//	dummyCid, err := cid.Parse("bafkqaaa")
+//	require.NoError(t, err)
+//
+//	proposal := market.DealProposal{
+//		PieceCID: dummyCid,
+//		Client:   client16.DefaultKey.Address,
+//		Provider: client16.DefaultKey.Address,
+//		Label:    dealLabel,
+//	}
+//
+//	proposalBytes := new(bytes.Buffer)
+//	err = proposal.MarshalCBOR(proposalBytes)
+//	require.NoError(t, err)
+//
+//	signature, err := client16.WalletSign(ctx, client16.DefaultKey.Address, proposalBytes.Bytes())
+//	require.NoError(t, err)
+//
+//	params, err := actors.SerializeParams(&market.PublishStorageDealsParams{
+//		Deals: []market.ClientDealProposal{{
+//			Proposal:        proposal,
+//			ClientSignature: *signature,
+//		}},
+//	})
+//	require.NoError(t, err)
+//
+//	fmt.Println(hex.EncodeToString(params))
+//}
+
+func TestSubmitInvalidDealLabel(t *testing.T) {
+	ctx := context.Background()
+
+	kit.QuietMiningLogs()
+
+	client16, _, ens := kit.EnsembleMinimal(t, kit.MockProofs(), kit.GenesisNetworkVersion(network.Version16))
+	ens.InterconnectAll().BeginMining(10 * time.Millisecond)
+
+	// This hex string is generated by using the commented function above.
+	serializedParams, err := hex.DecodeString("8181828bd82a45000155000000f458310394345a1393a5665772ae97456fdc00cf8f537960eeb3838c297da0d60546252d98469cc68b56eb45081e5c959c8cf4fa58310394345a1393a5665772ae97456fdc00cf8f537960eeb3838c297da0d60546252d98469cc68b56eb45081e5c959c8cf4fa64deadbeef00004040405861029927585cf250656cb3ddf337aed516e6393829389e52c45a4fbbe297b8ad3b7a008b3675a5b5c4df43657ff53bcb6c670b4bd83911867ba90b2b14da856a0ecb36782a7d87232272e3b9cd98dd959b2851602fea30c414a4dc1ea12057d31f81")
+	require.NoError(t, err)
+
+	_, err = client16.MpoolPushMessage(ctx, &types.Message{
+		To:     builtin.StorageMarketActorAddr,
+		From:   client16.DefaultKey.Address,
+		Value:  types.NewInt(0),
+		Method: builtin.MethodsMarket.PublishStorageDeals,
+		Params: serializedParams,
+	}, nil)
+	require.Contains(t, err.Error(), "Serialization error for Cbor protocol: InvalidUtf8")
+}