diff --git a/db/test_helper.go b/db/test_helper.go
index 9e6a2637..2779a583 100644
--- a/db/test_helper.go
+++ b/db/test_helper.go
@@ -17,3 +17,12 @@ func ConnectBlocks(w *SyncWorker, onNewBlock bchain.OnNewBlockFunc, initialSync
 func HandleFork(w *SyncWorker, localBestHeight uint32, localBestHash string, onNewBlock bchain.OnNewBlockFunc, initialSync bool) error {
 	return w.handleFork(localBestHeight, localBestHash, onNewBlock, initialSync)
 }
+
+// ConnectBlocksParallel keeps legacy integration tests compiling against the new API.
+func (w *SyncWorker) ConnectBlocksParallel(lower, higher uint32) error {
+	workers := w.syncWorkers
+	if workers < 1 {
+		workers = 1
+	}
+	return w.ParallelConnectBlocks(nil, lower, higher, uint32(workers))
+}