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 8dff3dfc3b..ff1f3fcc9d 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
@@ -8,8 +8,12 @@ import junit.framework.Assert;
 import junit.framework.TestCase;
 
 import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.stat.DruidDataSourceStatManager;
 
 public class TestClose_2 extends TestCase {
+    protected void tearDown() throws Exception {
+        Assert.assertEquals(0, DruidDataSourceStatManager.getInstance().getDataSourceList().size());
+    }
 
     public void test_close() throws Exception {
         DruidDataSource dataSource = new DruidDataSource();
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 f4447814ff..d6c21d58c3 100644
--- a/src/test/java/com/alibaba/druid/bvt/pool/TestConcurrent.java
+++ b/src/test/java/com/alibaba/druid/bvt/pool/TestConcurrent.java
@@ -10,6 +10,7 @@ import junit.framework.TestCase;
 
 import com.alibaba.druid.mock.MockDriver;
 import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.stat.DruidDataSourceStatManager;
 
 public class TestConcurrent extends TestCase {
 
@@ -41,6 +42,7 @@ public class TestConcurrent extends TestCase {
 
     protected void tearDown() throws Exception {
         dataSource.close();
+        Assert.assertEquals(0, DruidDataSourceStatManager.getInstance().getDataSourceList().size());
     }
 
     public void test_0() throws Exception {
@@ -79,7 +81,7 @@ public class TestConcurrent extends TestCase {
         }
 
         // 使用单个线程模拟并发打开10个连接
-        for (int i = 0; i < 1000 * 10; ++i) {
+        for (int i = 0; i < 1000 * 1; ++i) {
             final int COUNT = 10;
             Connection[] connections = new Connection[COUNT];