diff --git a/skywalking-storage-center/skywalking-storage/src/test/java/StorageThread.java b/skywalking-storage-center/skywalking-storage/src/test/java/StorageThread.java
index 30e0614cc..6cc2ce705 100644
--- a/skywalking-storage-center/skywalking-storage/src/test/java/StorageThread.java
+++ b/skywalking-storage-center/skywalking-storage/src/test/java/StorageThread.java
@@ -42,12 +42,12 @@ public class StorageThread extends Thread {
                 client.sendACKSpan(ackSpanList);
                 client.sendRequestSpan(requestSpanList);
                 cycle = 0;
-            } else {
-                requestSpanList[cycle] = requestSpan;
-                ackSpanList[cycle] = ackSpan;
-                cycle++;
             }
 
+            requestSpanList[cycle] = requestSpan;
+            ackSpanList[cycle] = ackSpan;
+            cycle++;
+
             if (i % 10_000 == 0) {
                 System.out.println(i + " " + value);
             }