diff --git a/Chapter3-2-7/src/test/java/com/didispace/ApplicationTests.java b/Chapter3-2-7/src/test/java/com/didispace/ApplicationTests.java
index bba7b8b..5ea5a98 100644
--- a/Chapter3-2-7/src/test/java/com/didispace/ApplicationTests.java
+++ b/Chapter3-2-7/src/test/java/com/didispace/ApplicationTests.java
@@ -1,30 +1,31 @@
-package com.didispace;
-
-import com.didispace.domain.User;
-import com.didispace.domain.UserMapper;
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.SpringApplicationConfiguration;
-import org.springframework.test.annotation.Rollback;
-import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
-
-
-@RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = Application.class)
-public class ApplicationTests {
-
-	@Autowired
-	private UserMapper userMapper;
-
-	@Test
-	@Rollback
-	public void findByName() throws Exception {
-		userMapper.insert("AAA", 20);
-		User u = userMapper.findByName("AAA");
-		Assert.assertEquals(20, u.getAge().intValue());
-	}
-
-}
+package com.didispace;
+
+import com.didispace.domain.User;
+import com.didispace.domain.UserMapper;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.test.annotation.Rollback;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(classes = Application.class)
+@Transactional
+public class ApplicationTests {
+
+	@Autowired
+	private UserMapper userMapper;
+
+	@Test
+	@Rollback
+	public void findByName() throws Exception {
+		userMapper.insert("AAA", 20);
+		User u = userMapper.findByName("AAA");
+		Assert.assertEquals(20, u.getAge().intValue());
+	}
+
+}
\ No newline at end of file