diff --git a/fine-hibernate/pom.xml b/fine-hibernate/pom.xml
index 85a8d335c..a8d68fb1b 100644
--- a/fine-hibernate/pom.xml
+++ b/fine-hibernate/pom.xml
@@ -107,5 +107,12 @@
             <scope>system</scope>
             <systemPath>${basedir}/lib/validation-api-1.1.0.Final.jar</systemPath>
         </dependency>
+        <dependency>
+            <groupId>com.fr.third</groupId>
+            <artifactId>junit</artifactId>
+            <version>local</version>
+            <scope>system</scope>
+            <systemPath>${basedir}/lib/junit-4.12.jar</systemPath>
+        </dependency>
     </dependencies>
 </project>
\ No newline at end of file
diff --git a/fine-hibernate/src/test/java/com/fr/third/org/hibernate/dialect/MySQLDialectTest.java b/fine-hibernate/src/test/java/com/fr/third/org/hibernate/dialect/MySQLDialectTest.java
new file mode 100644
index 000000000..329de6788
--- /dev/null
+++ b/fine-hibernate/src/test/java/com/fr/third/org/hibernate/dialect/MySQLDialectTest.java
@@ -0,0 +1,38 @@
+package com.fr.third.org.hibernate.dialect;
+
+import com.fr.third.org.hibernate.mapping.Column;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author lidongy
+ * @version 10.0
+ * Created by lidongy on 2020/9/18
+ */
+public class MySQLDialectTest {
+    @Test
+    public void testSqlConstraintString() {
+        List<Column> columnList = new ArrayList<>();
+        Column column1 = new Column();
+        column1.setName("id1");
+        column1.setLength(1000);
+        Column column2 = new Column();
+        column2.setName("id2");
+        column2.setLength(200);
+        Column column3 = new Column();
+        column3.setName("id3");
+        column3.setLength(255);
+
+        columnList.add(column1);
+        columnList.add(column2);
+        columnList.add(column3);
+
+        Assert.assertEquals(new MySQLDialect().sqlConstraintString(columnList), "primary key (id1, id2, id3)");
+        Assert.assertEquals(new MySQL5Dialect().sqlConstraintString(columnList), "key (id1(255), id2, id3)");
+        Assert.assertEquals(new MySQL8Dialect().sqlConstraintString(columnList), "primary key (id1, id2, id3)");
+
+    }
+}