diff --git a/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java b/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
index 4d6544b0f5..e340425e9a 100644
--- a/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
@@ -728,9 +728,9 @@ public abstract class DruidAbstractDataSource implements DruidAbstractDataSource
 
     protected boolean testConnection(Connection conn) {
         try {
-//            if (validConnectionChecker != null) {
-//                return validConnectionChecker.isValidConnection(conn);
-//            }
+            if (validConnectionChecker != null) {
+                return validConnectionChecker.isValidConnection(conn);
+            }
 
             String query = getValidationQuery();
             if (conn.isClosed()) {