diff --git a/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java b/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
index 63b0326979..8e424e790b 100644
--- a/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
@@ -82,9 +82,9 @@ public abstract class DruidAbstractDataSource extends WrapperAdapter implements
     public final static int                            DEFAULT_MIN_IDLE                          = 0;
     public final static int                            DEFAULT_MAX_WAIT                          = -1;
     public final static String                         DEFAULT_VALIDATION_QUERY                  = null;                                                //
-    public final static boolean                        DEFAULT_TEST_ON_BORROW                    = true;
+    public final static boolean                        DEFAULT_TEST_ON_BORROW                    = false;
     public final static boolean                        DEFAULT_TEST_ON_RETURN                    = false;
-    public final static boolean                        DEFAULT_WHILE_IDLE                        = false;
+    public final static boolean                        DEFAULT_WHILE_IDLE                        = true;
     public static final long                           DEFAULT_TIME_BETWEEN_EVICTION_RUNS_MILLIS = -1L;
     public static final long                           DEFAULT_TIME_BETWEEN_CONNECT_ERROR_MILLIS = 30 * 1000;
     public static final int                            DEFAULT_NUM_TESTS_PER_EVICTION_RUN        = 3;
diff --git a/src/main/java/com/alibaba/druid/pool/DruidDataSource.java b/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
index 8c77c37aec..ffb6c3feac 100644
--- a/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
@@ -575,6 +575,10 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
         if (!(isTestOnBorrow() || isTestOnReturn() || isTestWhileIdle())) {
             return;
         }
+        
+        if (this.validConnectionChecker != null) {
+            return;
+        }
 
         if (this.getValidationQuery() != null && this.getValidationQuery().length() > 0) {
             return;
diff --git a/src/main/java/com/alibaba/druid/pool/vendor/MSSQLValidConnectionChecker.java b/src/main/java/com/alibaba/druid/pool/vendor/MSSQLValidConnectionChecker.java
index 5a896018a6..451f39a224 100644
--- a/src/main/java/com/alibaba/druid/pool/vendor/MSSQLValidConnectionChecker.java
+++ b/src/main/java/com/alibaba/druid/pool/vendor/MSSQLValidConnectionChecker.java
@@ -45,10 +45,6 @@ public class MSSQLValidConnectionChecker implements ValidConnectionChecker, Seri
             return false;
         }
 
-        if (valiateQuery == null) {
-            return true;
-        }
-
         Statement stmt = null;
 
         try {
diff --git a/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java b/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
index 190718dbd7..44303b63ed 100644
--- a/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
+++ b/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
@@ -61,10 +61,6 @@ public class MySqlValidConnectionChecker implements ValidConnectionChecker, Seri
             return false;
         }
 
-        if (valiateQuery == null) {
-            return true;
-        }
-
         if (driverHasPingMethod) {
             if (conn instanceof DruidPooledConnection) {
                 conn = ((DruidPooledConnection) conn).getConnection();
diff --git a/src/main/java/com/alibaba/druid/pool/vendor/OracleValidConnectionChecker.java b/src/main/java/com/alibaba/druid/pool/vendor/OracleValidConnectionChecker.java
index 9e283b835d..081071a4f8 100644
--- a/src/main/java/com/alibaba/druid/pool/vendor/OracleValidConnectionChecker.java
+++ b/src/main/java/com/alibaba/druid/pool/vendor/OracleValidConnectionChecker.java
@@ -62,10 +62,6 @@ public class OracleValidConnectionChecker implements ValidConnectionChecker, Ser
             return false;
         }
 
-        if (valiateQuery == null) {
-            return true;
-        }
-
         try {
             if (conn instanceof DruidPooledConnection) {
                 conn = ((DruidPooledConnection) conn).getConnection();
diff --git a/src/test/java/com/alibaba/druid/bvt/pool/basic/DataSourceTest3.java b/src/test/java/com/alibaba/druid/bvt/pool/basic/DataSourceTest3.java
index e0591fc37b..36e51aa321 100644
--- a/src/test/java/com/alibaba/druid/bvt/pool/basic/DataSourceTest3.java
+++ b/src/test/java/com/alibaba/druid/bvt/pool/basic/DataSourceTest3.java
@@ -21,9 +21,10 @@ import java.util.Properties;
 
 import javax.security.auth.callback.PasswordCallback;
 
-import junit.framework.Assert;
 import junit.framework.TestCase;
 
+import org.junit.Assert;
+
 import com.alibaba.druid.mock.MockDriver;
 import com.alibaba.druid.pool.DruidDataSource;
 import com.alibaba.druid.pool.DruidPooledConnection;
@@ -323,8 +324,17 @@ public class DataSourceTest3 extends TestCase {
     public void test_error_validateConnection_3() throws Exception {
         dataSource.setValidationQuery(null);
         dataSource.setValidConnectionChecker(new MySqlValidConnectionChecker());
-        DruidPooledConnection conn = dataSource.getConnection().unwrap(DruidPooledConnection.class);
 
-        dataSource.validateConnection(conn);
+        {
+            Exception error = null;
+            try {
+                DruidPooledConnection conn = dataSource.getConnection().unwrap(DruidPooledConnection.class);
+                dataSource.validateConnection(conn);
+            } catch (SQLException ex) {
+                error = ex;
+            }
+            Assert.assertNotNull(error);
+        }
+        
     }
 }
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlSelectTest_10.java b/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlSelectTest_10.java
index 74e760f1c2..9e8a4f1fb8 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlSelectTest_10.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlSelectTest_10.java
@@ -54,8 +54,8 @@ public class MySqlSelectTest_10 extends MysqlTest {
         Assert.assertEquals(1, visitor.getTables().size());
         Assert.assertEquals(2, visitor.getColumns().size());
         Assert.assertEquals(1, visitor.getConditions().size());
-        Assert.assertEquals(0, visitor.getOrderByColumns().size());
+        Assert.assertEquals(1, visitor.getOrderByColumns().size());
 
-        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("group")));
+        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("t_department")));
     }
 }
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/oracle/OracleSelectTest42.java b/src/test/java/com/alibaba/druid/bvt/sql/oracle/OracleSelectTest42.java
index 5ae58a4974..79ab54ffc9 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/oracle/OracleSelectTest42.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/oracle/OracleSelectTest42.java
@@ -49,9 +49,9 @@ public class OracleSelectTest42 extends OracleTest {
         System.out.println("relationships : " + visitor.getRelationships());
         System.out.println("orderBy : " + visitor.getOrderByColumns());
 
-        Assert.assertEquals(4, visitor.getTables().size());
+        Assert.assertEquals(1, visitor.getTables().size());
 
-        Assert.assertEquals(9, visitor.getColumns().size());
+        Assert.assertEquals(2, visitor.getColumns().size());
 
         // Assert.assertTrue(visitor.getColumns().contains(new TableStat.Column("acduser.vw_acd_info", "xzqh")));