diff --git a/miner/worker_test.go b/miner/worker_test.go
index 859495d7bf169..9c7961f7866d5 100644
--- a/miner/worker_test.go
+++ b/miner/worker_test.go
@@ -328,7 +328,7 @@ func TestStreamUncleBlock(t *testing.T) {
 	w, b := newTestWorker(t, ethashChainConfig, ethash, rawdb.NewMemoryDatabase(), 1)
 	defer w.close()
 
-	var taskCh = make(chan struct{})
+	var taskCh = make(chan struct{}, 3)
 
 	taskIndex := 0
 	w.newTaskHook = func(task *task) {