diff --git a/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDDLDefinition.java b/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDDLDefinition.java
index f4a25a7ec2a6b179d43ff7c8358fc542fab92e29..fe3ee5536304b3ec300812b4fa70e243d857c782 100644
--- a/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDDLDefinition.java
+++ b/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDDLDefinition.java
@@ -63,4 +63,9 @@ public class AssertDDLDefinition implements AssertDefinition {
     
     @XmlElement(name = "subAssert")
     private List<AssertSubDefinition> subAsserts = new ArrayList<>();
+    
+    @Override
+    public String toString() {
+        return id;
+    }
 }
diff --git a/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDMLDefinition.java b/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDMLDefinition.java
index 8f717c427a58b085a5d6cd5f334ae6e30ab21a7e..bd521729e98957fab06bdc629f1ca82dfdea134f 100644
--- a/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDMLDefinition.java
+++ b/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDMLDefinition.java
@@ -63,4 +63,9 @@ public class AssertDMLDefinition implements AssertDefinition {
     
     @XmlElement(name = "subAssert")
     private List<AssertSubDefinition> subAsserts = new ArrayList<>();
+    
+    @Override
+    public String toString() {
+        return id;
+    }
 }
diff --git a/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDQLDefinition.java b/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDQLDefinition.java
index c47ed5047ffa0e17fe6d3d8639cd48f0834eb455..4b909379174bcef5d5006f27df5b2ec362b69ca9 100644
--- a/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDQLDefinition.java
+++ b/sharding-jdbc-core/src/test/java/io/shardingjdbc/dbtest/config/bean/AssertDQLDefinition.java
@@ -54,4 +54,9 @@ public class AssertDQLDefinition implements AssertDefinition {
     
     @XmlElement(name = "subAssert")
     private List<AssertSubDefinition> subAsserts = new ArrayList<>();
+    
+    @Override
+    public String toString() {
+        return id;
+    }
 }