diff --git a/ast/search_test.go b/ast/search_test.go
index 4fa7306..2d86d64 100644
--- a/ast/search_test.go
+++ b/ast/search_test.go
@@ -37,7 +37,9 @@ func TestGC_Search(t *testing.T) {
         t.Fatal(err)
     }
     wg := &sync.WaitGroup{}
-    N := 10000
+    // A limitation of the race detecting is 8128.
+    // See https://github.com/golang/go/issues/43898
+    N := 5000
     for i:=0; i<N; i++ {
         wg.Add(1)
         go func (wg *sync.WaitGroup)  {
diff --git a/issue_test/issue128_test.go b/issue_test/issue128_test.go
index 96cf78e..f2af235 100644
--- a/issue_test/issue128_test.go
+++ b/issue_test/issue128_test.go
@@ -14,18 +14,16 @@
  * limitations under the License.
  */
 
- package issue_test
+package issue_test
 
 import (
-    `runtime/debug`
     `testing`
 
     `github.com/bytedance/sonic`
 )
 
 //NOTICE: only DEBUG mode can reproduce problem
-func TestDebug(t *testing.T) {
-    debug.SetGCPercent(-1)
+func TestIssue128_PanicInRecurseOP(t *testing.T) {
     data := &Data{
         Details: []*Detail{
             {
diff --git a/issue_test/testmain_test.go b/issue_test/testmain_test.go
new file mode 100644
index 0000000..c8457e1
--- /dev/null
+++ b/issue_test/testmain_test.go
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2021 ByteDance Inc.
+ *
+ * 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 issue_test
+
+import (
+    `runtime`
+    `runtime/debug`
+    `testing`
+)
+
+var debugAsyncGC = true
+
+func TestMain(m *testing.M) {
+    go func ()  {
+        if !debugAsyncGC {
+            return 
+        }
+        println("Begin GC looping...")
+        for {
+            runtime.GC()
+            debug.FreeOSMemory() 
+        }
+    }()
+    m.Run()
+}
\ No newline at end of file