diff --git a/mybatis-plus-spring/build.gradle b/mybatis-plus-spring/build.gradle
index 443438f9e..6e47b15eb 100644
--- a/mybatis-plus-spring/build.gradle
+++ b/mybatis-plus-spring/build.gradle
@@ -1,7 +1,15 @@
 apply plugin: 'kotlin'
 
-compileKotlin{
-    kotlinOptions.jvmTarget = "1.8"
+compileKotlin {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
+compileTestKotlin {
+    kotlinOptions {
+        freeCompilerArgs = ['-Xjvm-default=all']
+    }
 }
 
 dependencies {
diff --git a/mybatis-plus-spring/src/test/kotlin/com/baomidou/mybatisplus/test/kotlin/ChainWrappersTest.kt b/mybatis-plus-spring/src/test/kotlin/com/baomidou/mybatisplus/test/kotlin/ChainWrappersTest.kt
index f4e80fde1..49b99238c 100644
--- a/mybatis-plus-spring/src/test/kotlin/com/baomidou/mybatisplus/test/kotlin/ChainWrappersTest.kt
+++ b/mybatis-plus-spring/src/test/kotlin/com/baomidou/mybatisplus/test/kotlin/ChainWrappersTest.kt
@@ -38,6 +38,15 @@ class ChainWrappersTest : BaseDbTest<UserMapper>() {
         Assertions.assertEquals(4, Db.ktQuery(User::class.java).eq(User::id, 2).one().roleId)
     }
 
+    @Test
+    fun testDefaultMethod() {
+        doTestAutoCommit(fun(m) {
+            Assertions.assertEquals("hello baomidou!", m.hello())
+            Assertions.assertNotNull(m.findById(1))
+            Assertions.assertNull(m.findById(-1))
+        })
+    }
+
     @Test
     fun testSetSql() {
         Assertions.assertTrue(
diff --git a/mybatis-plus-spring/src/test/kotlin/com/baomidou/mybatisplus/test/kotlin/UserMapper.kt b/mybatis-plus-spring/src/test/kotlin/com/baomidou/mybatisplus/test/kotlin/UserMapper.kt
index 4d9aad7b9..0f0eb41e9 100644
--- a/mybatis-plus-spring/src/test/kotlin/com/baomidou/mybatisplus/test/kotlin/UserMapper.kt
+++ b/mybatis-plus-spring/src/test/kotlin/com/baomidou/mybatisplus/test/kotlin/UserMapper.kt
@@ -1,5 +1,16 @@
 package com.baomidou.mybatisplus.test.kotlin
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper
+import com.baomidou.mybatisplus.extension.kotlin.KtQueryWrapper
 
-interface UserMapper : BaseMapper<User>
+interface UserMapper : BaseMapper<User> {
+
+    fun hello(): String {
+        return "hello baomidou!";
+    }
+
+    fun findById(id: Int): User? {
+        return selectOne(KtQueryWrapper(User::class.java).eq(User::id, id));
+    }
+
+}