diff --git a/src/test/java/com/alibaba/druid/bvt/pool/TestClose_2.java b/src/test/java/com/alibaba/druid/bvt/pool/TestClose_2.java
index ff1f3fcc9d..91c0100226 100644
--- a/src/test/java/com/alibaba/druid/bvt/pool/TestClose_2.java
+++ b/src/test/java/com/alibaba/druid/bvt/pool/TestClose_2.java
@@ -11,6 +11,9 @@ import com.alibaba.druid.pool.DruidDataSource;
 import com.alibaba.druid.stat.DruidDataSourceStatManager;
 
 public class TestClose_2 extends TestCase {
+    protected void setUp() throws Exception {
+        Assert.assertEquals(0, DruidDataSourceStatManager.getInstance().getDataSourceList().size());
+    }
     protected void tearDown() throws Exception {
         Assert.assertEquals(0, DruidDataSourceStatManager.getInstance().getDataSourceList().size());
     }
diff --git a/src/test/java/com/alibaba/druid/bvt/pool/TestConcurrent.java b/src/test/java/com/alibaba/druid/bvt/pool/TestConcurrent.java
index 5ecc0b2162..f7f61bbeb4 100644
--- a/src/test/java/com/alibaba/druid/bvt/pool/TestConcurrent.java
+++ b/src/test/java/com/alibaba/druid/bvt/pool/TestConcurrent.java
@@ -18,6 +18,8 @@ public class TestConcurrent extends TestCase {
     private DruidDataSource dataSource;
 
     protected void setUp() throws Exception {
+        Assert.assertEquals(0, DruidDataSourceStatManager.getInstance().getDataSourceList().size());
+        
         driver = new MockDriver();
         driver.setLogExecuteQueryEnable(false);