diff --git a/arbnode/inbox_test.go b/arbnode/inbox_test.go
index dc80cd20d9..0c8f00a3d4 100644
--- a/arbnode/inbox_test.go
+++ b/arbnode/inbox_test.go
@@ -90,6 +90,14 @@ func (w *execClientWrapper) ResultAtPos(pos arbutil.MessageIndex) containers.Pro
 	return containers.NewReadyPromise(w.ExecutionEngine.ResultAtPos(pos))
 }
 
+func (w *execClientWrapper) Start(ctx context.Context) error {
+	return nil
+}
+
+func (w *execClientWrapper) StopAndWait() {
+	return
+}
+
 func NewTransactionStreamerForTest(t *testing.T, ownerAddress common.Address) (*gethexec.ExecutionEngine, *TransactionStreamer, ethdb.Database, *core.BlockChain) {
 	chainConfig := chaininfo.ArbitrumDevTestChainConfig()