diff --git a/protocol/localtxsubmission/client_test.go b/protocol/localtxsubmission/client_test.go
new file mode 100644
index 00000000..f67fb301
--- /dev/null
+++ b/protocol/localtxsubmission/client_test.go
@@ -0,0 +1,150 @@
+// Copyright 2024 Blink Labs Software
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package localtxsubmission_test
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	ouroboros "github.com/blinklabs-io/gouroboros"
+	"github.com/blinklabs-io/gouroboros/internal/test"
+	"github.com/blinklabs-io/gouroboros/ledger"
+	"github.com/blinklabs-io/gouroboros/protocol"
+	"github.com/blinklabs-io/gouroboros/protocol/localtxsubmission"
+	ouroboros_mock "github.com/blinklabs-io/ouroboros-mock"
+	"go.uber.org/goleak"
+)
+
+var conversationHandshakeSubmitTx = []ouroboros_mock.ConversationEntry{
+	ouroboros_mock.ConversationEntryHandshakeRequestGeneric,
+	ouroboros_mock.ConversationEntryHandshakeNtCResponse,
+	ouroboros_mock.ConversationEntryInput{
+		ProtocolId:  localtxsubmission.ProtocolId,
+		MessageType: localtxsubmission.MessageTypeSubmitTx,
+	},
+}
+
+type testInnerFunc func(*testing.T, *ouroboros.Connection)
+
+func runTest(t *testing.T, conversation []ouroboros_mock.ConversationEntry, innerFunc testInnerFunc) {
+	defer goleak.VerifyNone(t)
+	mockConn := ouroboros_mock.NewConnection(
+		ouroboros_mock.ProtocolRoleClient,
+		conversation,
+	)
+	// Async mock connection error handler
+	asyncErrChan := make(chan error, 1)
+	go func() {
+		err := <-mockConn.(*ouroboros_mock.Connection).ErrorChan()
+		if err != nil {
+			asyncErrChan <- fmt.Errorf("received unexpected error: %s", err)
+		}
+		close(asyncErrChan)
+	}()
+	oConn, err := ouroboros.New(
+		ouroboros.WithConnection(mockConn),
+		ouroboros.WithNetworkMagic(ouroboros_mock.MockNetworkMagic),
+	)
+	if err != nil {
+		t.Fatalf("unexpected error when creating Ouroboros object: %s", err)
+	}
+	// Async error handler
+	go func() {
+		err, ok := <-oConn.ErrorChan()
+		if !ok {
+			return
+		}
+		// We can't call t.Fatalf() from a different Goroutine, so we panic instead
+		panic(fmt.Sprintf("unexpected Ouroboros error: %s", err))
+	}()
+	// Run test inner function
+	innerFunc(t, oConn)
+	// Wait for mock connection shutdown
+	select {
+	case err, ok := <-asyncErrChan:
+		if ok {
+			t.Fatal(err.Error())
+		}
+	case <-time.After(2 * time.Second):
+		t.Fatalf("did not complete within timeout")
+	}
+	// Close Ouroboros connection
+	if err := oConn.Close(); err != nil {
+		t.Fatalf("unexpected error when closing Ouroboros object: %s", err)
+	}
+	// Wait for connection shutdown
+	select {
+	case <-oConn.ErrorChan():
+	case <-time.After(10 * time.Second):
+		t.Errorf("did not shutdown within timeout")
+	}
+}
+
+func TestSubmitTxAccept(t *testing.T) {
+	testTx := test.DecodeHexString("abcdef0123456789")
+	conversation := append(
+		conversationHandshakeSubmitTx,
+		ouroboros_mock.ConversationEntryOutput{
+			ProtocolId: localtxsubmission.ProtocolId,
+			IsResponse: true,
+			Messages: []protocol.Message{
+				localtxsubmission.NewMsgAcceptTx(),
+			},
+		},
+	)
+	runTest(
+		t,
+		conversation,
+		func(t *testing.T, oConn *ouroboros.Connection) {
+			err := oConn.LocalTxSubmission().Client.SubmitTx(ledger.TxTypeBabbage, testTx)
+			if err != nil {
+				t.Fatalf("received unexpected error: %s", err)
+			}
+		},
+	)
+}
+
+func TestSubmitTxRject(t *testing.T) {
+	testTx := test.DecodeHexString("abcdef0123456789")
+	expectedErr := localtxsubmission.TransactionRejectedError{
+		// [0, [1, ["foo"]]]
+		ReasonCbor: test.DecodeHexString("820082018163666f6f"),
+		Reason:     fmt.Errorf("GenericError ([0 [1 [foo]]])"),
+	}
+	conversation := append(
+		conversationHandshakeSubmitTx,
+		ouroboros_mock.ConversationEntryOutput{
+			ProtocolId: localtxsubmission.ProtocolId,
+			IsResponse: true,
+			Messages: []protocol.Message{
+				localtxsubmission.NewMsgRejectTx(expectedErr.ReasonCbor),
+			},
+		},
+	)
+	runTest(
+		t,
+		conversation,
+		func(t *testing.T, oConn *ouroboros.Connection) {
+			err := oConn.LocalTxSubmission().Client.SubmitTx(ledger.TxTypeBabbage, testTx)
+			if err == nil {
+				t.Fatalf("did not receive expected error")
+			}
+			if err.Error() != expectedErr.Error() {
+				t.Fatalf("did not receive expected error\n  got:    %s\n  wanted: %s", err, expectedErr)
+			}
+		},
+	)
+}