diff --git a/src/test/java/com/alibaba/druid/bvt/pool/TestIdle3_Concurrent_MaxActive.java b/src/test/java/com/alibaba/druid/bvt/pool/TestIdle3_Concurrent_MaxActive.java
index f7388db40d..68de4b8aed 100644
--- a/src/test/java/com/alibaba/druid/bvt/pool/TestIdle3_Concurrent_MaxActive.java
+++ b/src/test/java/com/alibaba/druid/bvt/pool/TestIdle3_Concurrent_MaxActive.java
@@ -12,6 +12,7 @@ import junit.framework.TestCase;
 
 import com.alibaba.druid.mock.MockDriver;
 import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.stat.DruidDataSourceStatManager;
 
 public class TestIdle3_Concurrent_MaxActive extends TestCase {
 
@@ -19,6 +20,8 @@ public class TestIdle3_Concurrent_MaxActive extends TestCase {
     private DruidDataSource dataSource;
 
     protected void setUp() throws Exception {
+        Assert.assertEquals(0, DruidDataSourceStatManager.getInstance().getDataSourceList().size());
+        
         driver = new MockDriver();
 
         dataSource = new DruidDataSource();
@@ -39,6 +42,7 @@ public class TestIdle3_Concurrent_MaxActive extends TestCase {
 
     protected void tearDown() throws Exception {
         dataSource.close();
+        Assert.assertEquals(0, DruidDataSourceStatManager.getInstance().getDataSourceList().size());
     }
 
     public void test_idle2() throws Exception {
diff --git a/src/test/java/com/alibaba/druid/bvt/pool/TestRemoveAbandoned.java b/src/test/java/com/alibaba/druid/bvt/pool/TestRemoveAbandoned.java
index 501a7806b1..c8106dd597 100644
--- a/src/test/java/com/alibaba/druid/bvt/pool/TestRemoveAbandoned.java
+++ b/src/test/java/com/alibaba/druid/bvt/pool/TestRemoveAbandoned.java
@@ -32,6 +32,8 @@ public class TestRemoveAbandoned extends TestCase {
         dataSource.setTestOnBorrow(false);
         dataSource.setValidationQuery("SELECT 1");
         dataSource.setFilters("stat");
+
+        Assert.assertEquals(0, DruidDataSourceStatManager.getInstance().getDataSourceList().size());
     }
     
     protected void tearDown() throws Exception {