diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/pom.xml b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/pom.xml
index d8b0d8c3b..07fd86498 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/pom.xml
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/pom.xml
@@ -63,22 +63,6 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
-
-        <!-- https://mvnrepository.com/artifact/org.powermock.modules.test.powermockito/powermock-modules-test-powermockito -->
-        <dependency>
-            <groupId>org.powermock</groupId>
-            <artifactId>powermock-module-junit4</artifactId>
-            <version>2.0.0</version>
-            <scope>test</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>org.powermock</groupId>
-            <artifactId>powermock-api-mockito2</artifactId>
-            <version>2.0.0</version>
-            <scope>test</scope>
-        </dependency>
-
     </dependencies>
 
 </project>
diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationExtConfigTests.java b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationExtConfigTests.java
index 11a515b89..f28b259a0 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationExtConfigTests.java
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationExtConfigTests.java
@@ -16,20 +16,14 @@
 
 package com.alibaba.cloud.nacos;
 
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.Method;
-
 import com.alibaba.cloud.nacos.client.NacosPropertySourceLocator;
 import com.alibaba.cloud.nacos.endpoint.NacosConfigEndpointAutoConfiguration;
+import com.alibaba.nacos.api.exception.NacosException;
 import com.alibaba.nacos.client.config.NacosConfigService;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.powermock.api.mockito.PowerMockito;
-import org.powermock.api.support.MethodProxy;
-import org.powermock.core.classloader.annotations.PowerMockIgnore;
-import org.powermock.core.classloader.annotations.PrepareForTest;
-import org.powermock.modules.junit4.PowerMockRunner;
-import org.powermock.modules.junit4.PowerMockRunnerDelegate;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -37,23 +31,20 @@ import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.env.Environment;
-import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.util.ReflectionTestUtils;
 
 import static com.alibaba.cloud.nacos.NacosConfigurationExtConfigTests.TestConfig;
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.Mockito.when;
 import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.NONE;
 
 /**
- * TODO refactor, remove powermock.
  *
  * @author xiaojing
  * @author freeman
  */
-
-@RunWith(PowerMockRunner.class)
-@PowerMockIgnore("javax.management.*")
-@PowerMockRunnerDelegate(SpringRunner.class)
-@PrepareForTest({ NacosConfigService.class })
 @SpringBootTest(classes = TestConfig.class, webEnvironment = NONE, properties = {
 		"spring.application.name=myTestService1", "spring.profiles.active=dev,test",
 		"spring.cloud.nacos.config.server-addr=127.0.0.1:8848",
@@ -66,63 +57,9 @@ import static org.springframework.boot.test.context.SpringBootTest.WebEnvironmen
 		"spring.cloud.nacos.config.shared-dataids=common1.properties,common2.properties",
 		"spring.cloud.nacos.config.accessKey=test-accessKey",
 		"spring.cloud.nacos.config.secretKey=test-secretKey",
-		"spring.cloud.bootstrap.enabled=true"
-})
+		"spring.cloud.bootstrap.enabled=true" })
 public class NacosConfigurationExtConfigTests {
 
-	static {
-
-		try {
-			// when(any(ConfigService.class).getConfig(eq("test-name.properties"),
-			// eq("test-group"), any())).thenReturn("user.name=hello");
-
-			Method method = PowerMockito.method(NacosConfigService.class, "getConfig",
-					String.class, String.class, long.class);
-			MethodProxy.proxy(method, new InvocationHandler() {
-				@Override
-				public Object invoke(Object proxy, Method method, Object[] args)
-						throws Throwable {
-
-					if ("test-name.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "user.name=hello\nuser.age=12";
-					}
-
-					if ("test-name-dev.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "user.name=dev";
-					}
-
-					if ("ext-config-common01.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "test-ext-config1=config1\ntest-ext-config2=config1";
-					}
-					if ("ext-config-common02.properties".equals(args[0])
-							&& "GLOBAL_GROUP".equals(args[1])) {
-						return "test-ext-config2=config2";
-					}
-
-					if ("common1.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "test-common1=common1\ntest-common2=common1";
-					}
-
-					if ("common2.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "test-common2=common2";
-					}
-
-					return "";
-				}
-			});
-
-		}
-		catch (Exception ignore) {
-			ignore.printStackTrace();
-
-		}
-	}
-
 	@Autowired
 	private Environment environment;
 
@@ -132,16 +69,69 @@ public class NacosConfigurationExtConfigTests {
 	@Autowired
 	private NacosConfigProperties properties;
 
+	static {
+		try {
+			NacosConfigService mockedNacosConfigService = Mockito
+					.mock(NacosConfigService.class);
+			when(mockedNacosConfigService.getConfig(any(), any(), anyLong()))
+					.thenAnswer(new Answer<String>() {
+						@Override
+						public String answer(InvocationOnMock invocationOnMock)
+								throws Throwable {
+							String dataId = invocationOnMock.getArgument(0, String.class);
+							String group = invocationOnMock.getArgument(1, String.class);
+							if ("test-name.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "user.name=hello\nuser.age=12";
+							}
+
+							if ("test-name-dev.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "user.name=dev";
+							}
+
+							if ("ext-config-common01.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "test-ext-config1=config1\ntest-ext-config2=config1";
+							}
+							if ("ext-config-common02.properties".equals(dataId)
+									&& "GLOBAL_GROUP".equals(group)) {
+								return "test-ext-config2=config2";
+							}
+
+							if ("common1.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "test-common1=common1\ntest-common2=common1";
+							}
+
+							if ("common2.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "test-common2=common2";
+							}
+
+							return "";
+						}
+
+					});
+
+			ReflectionTestUtils.setField(NacosConfigManager.class, "service",
+					mockedNacosConfigService);
+		}
+		catch (NacosException ignored) {
+			ignored.printStackTrace();
+		}
+	}
+
 	@Test
 	public void contextLoads() throws Exception {
 
 		assertThat(locator).isNotNull();
 		assertThat(properties).isNotNull();
 
-		assertThat("config1").isEqualTo(environment.getProperty("test-ext-config1"));
-		assertThat("config2").isEqualTo(environment.getProperty("test-ext-config2"));
-		assertThat("common1").isEqualTo(environment.getProperty("test-common1"));
-		assertThat("common2").isEqualTo(environment.getProperty("test-common2"));
+		assertThat(environment.getProperty("test-ext-config1")).isEqualTo("config1");
+		assertThat(environment.getProperty("test-ext-config2")).isEqualTo("config2");
+		assertThat(environment.getProperty("test-common1")).isEqualTo("common1");
+		assertThat(environment.getProperty("test-common2")).isEqualTo("common2");
 	}
 
 	@Configuration
diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationNewTest.java b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationNewTest.java
index 0ff3cfa94..c2c1255a2 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationNewTest.java
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationNewTest.java
@@ -16,8 +16,6 @@
 
 package com.alibaba.cloud.nacos;
 
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.Method;
 import java.util.Map;
 
 import com.alibaba.cloud.nacos.NacosConfigProperties.Config;
@@ -26,14 +24,10 @@ import com.alibaba.cloud.nacos.endpoint.NacosConfigEndpoint;
 import com.alibaba.cloud.nacos.endpoint.NacosConfigEndpointAutoConfiguration;
 import com.alibaba.cloud.nacos.refresh.NacosRefreshHistory;
 import com.alibaba.nacos.client.config.NacosConfigService;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.powermock.api.mockito.PowerMockito;
-import org.powermock.api.support.MethodProxy;
-import org.powermock.core.classloader.annotations.PowerMockIgnore;
-import org.powermock.core.classloader.annotations.PrepareForTest;
-import org.powermock.modules.junit4.PowerMockRunner;
-import org.powermock.modules.junit4.PowerMockRunnerDelegate;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -41,21 +35,19 @@ import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.env.Environment;
-import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.util.ReflectionTestUtils;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.Mockito.when;
 import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.NONE;
 
 /**
- * TODO refactor, remove powermock.
  *
  * @author xiaojing
  * @author freeman
  */
-@RunWith(PowerMockRunner.class)
-@PowerMockIgnore("javax.management.*")
-@PowerMockRunnerDelegate(SpringRunner.class)
-@PrepareForTest({ NacosConfigService.class })
 @SpringBootTest(classes = NacosConfigurationNewTest.TestConfig.class, webEnvironment = NONE, properties = {
 		"spring.application.name=myTestService1", "spring.profiles.active=dev,test",
 		"spring.cloud.nacos.config.server-addr=127.0.0.1:8848",
@@ -74,58 +66,61 @@ import static org.springframework.boot.test.context.SpringBootTest.WebEnvironmen
 		"spring.cloud.nacos.config.shared-configs[1]=common2.properties",
 		"spring.cloud.nacos.config.accessKey=test-accessKey",
 		"spring.cloud.nacos.config.secretKey=test-secretKey",
-		"spring.cloud.bootstrap.enabled=true"
-})
+		"spring.cloud.bootstrap.enabled=true" })
 public class NacosConfigurationNewTest {
 
 	static {
 
 		try {
-
-			Method method = PowerMockito.method(NacosConfigService.class, "getConfig",
-					String.class, String.class, long.class);
-			MethodProxy.proxy(method, new InvocationHandler() {
-				@Override
-				public Object invoke(Object proxy, Method method, Object[] args)
-						throws Throwable {
-
-					if ("test-name.properties".equals(args[0])
-							&& "test-group".equals(args[1])) {
-						return "user.name=hello\nuser.age=12";
-					}
-
-					if ("test-name-dev.properties".equals(args[0])
-							&& "test-group".equals(args[1])) {
-						return "user.name=dev";
-					}
-
-					if ("ext-config-common01.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "test-ext-config1=config1\ntest-ext-config2=config1";
-					}
-					if ("ext-config-common02.properties".equals(args[0])
-							&& "GLOBAL_GROUP".equals(args[1])) {
-						return "test-ext-config2=config2";
-					}
-
-					if ("common1.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "test-common1=common1\ntest-common2=common1";
-					}
-
-					if ("common2.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "test-common2=common2";
-					}
-
-					return "";
-				}
-			});
+			NacosConfigService mockedNacosConfigService = Mockito
+					.mock(NacosConfigService.class);
+			when(mockedNacosConfigService.getConfig(any(), any(), anyLong()))
+					.thenAnswer(new Answer<String>() {
+						@Override
+						public String answer(InvocationOnMock invocationOnMock)
+								throws Throwable {
+							String dataId = invocationOnMock.getArgument(0, String.class);
+							String group = invocationOnMock.getArgument(1, String.class);
+							if ("test-name.properties".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "user.name=hello\nuser.age=12";
+							}
+
+							if ("test-name-dev.properties".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "user.name=dev";
+							}
+
+							if ("ext-config-common01.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "test-ext-config1=config1\ntest-ext-config2=config1";
+							}
+							if ("ext-config-common02.properties".equals(dataId)
+									&& "GLOBAL_GROUP".equals(group)) {
+								return "test-ext-config2=config2";
+							}
+
+							if ("common1.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "test-common1=common1\ntest-common2=common1";
+							}
+
+							if ("common2.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "test-common2=common2";
+							}
+
+							return "";
+						}
+
+					});
+
+			ReflectionTestUtils.setField(NacosConfigManager.class, "service",
+					mockedNacosConfigService);
 
 		}
 		catch (Exception ignore) {
 			ignore.printStackTrace();
-
 		}
 	}
 
diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationNoSuffixTest.java b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationNoSuffixTest.java
index 073093c70..640a25a91 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationNoSuffixTest.java
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationNoSuffixTest.java
@@ -16,8 +16,6 @@
 
 package com.alibaba.cloud.nacos;
 
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.Method;
 import java.util.Map;
 
 import com.alibaba.cloud.nacos.client.NacosPropertySourceLocator;
@@ -25,14 +23,10 @@ import com.alibaba.cloud.nacos.endpoint.NacosConfigEndpoint;
 import com.alibaba.cloud.nacos.endpoint.NacosConfigEndpointAutoConfiguration;
 import com.alibaba.cloud.nacos.refresh.NacosRefreshHistory;
 import com.alibaba.nacos.client.config.NacosConfigService;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.powermock.api.mockito.PowerMockito;
-import org.powermock.api.support.MethodProxy;
-import org.powermock.core.classloader.annotations.PowerMockIgnore;
-import org.powermock.core.classloader.annotations.PrepareForTest;
-import org.powermock.modules.junit4.PowerMockRunner;
-import org.powermock.modules.junit4.PowerMockRunnerDelegate;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -40,23 +34,19 @@ import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.env.Environment;
-import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.util.ReflectionTestUtils;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.Mockito.when;
 import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.NONE;
 
 /**
- * TODO refactor, remove powermock.
  *
  * @author zkz
  * @author freeman
  */
-
-@RunWith(PowerMockRunner.class)
-@PowerMockIgnore({ "javax.management.*", "javax.xml.parsers.*",
-		"com.sun.org.apache.xerces.internal.jaxp.*", "org.w3c.dom.*" })
-@PowerMockRunnerDelegate(SpringRunner.class)
-@PrepareForTest({ NacosConfigService.class })
 @SpringBootTest(classes = NacosConfigurationNoSuffixTest.TestConfig.class, webEnvironment = NONE, properties = {
 		"spring.application.name=app-no-suffix", "spring.profiles.active=dev",
 		"spring.cloud.nacos.config.server-addr=127.0.0.1:8848",
@@ -73,87 +63,93 @@ import static org.springframework.boot.test.context.SpringBootTest.WebEnvironmen
 		"spring.cloud.nacos.config.shared-dataids=shared-data1.properties,shared-data2.xml",
 		"spring.cloud.nacos.config.accessKey=test-accessKey",
 		"spring.cloud.nacos.config.secretKey=test-secretKey",
-		"spring.cloud.bootstrap.enabled=true"
-})
+		"spring.cloud.bootstrap.enabled=true" })
 public class NacosConfigurationNoSuffixTest {
 
 	static {
 
 		try {
-
-			Method method = PowerMockito.method(NacosConfigService.class, "getConfig",
-					String.class, String.class, long.class);
-			MethodProxy.proxy(method, new InvocationHandler() {
-				@Override
-				public Object invoke(Object proxy, Method method, Object[] args)
-						throws Throwable {
-
-					if ("app-no-suffix".equals(args[0]) && "test-group".equals(args[1])) {
-						return "test-no-suffix=value-no-suffix-1";
-					}
-					if ("app-no-suffix.properties".equals(args[0])
-							&& "test-group".equals(args[1])) {
-						return "test-no-suffix=value-no-suffix-2";
-					}
-
-					if ("test-no-suffix-name".equals(args[0])
-							&& "test-group".equals(args[1])) {
-						return "test-no-suffix-assign=assign-value-no-suffix-111";
-					}
-					if ("test-no-suffix-name.properties".equals(args[0])
-							&& "test-group".equals(args[1])) {
-						return "test-no-suffix-assign=assign-value-no-suffix-222";
-					}
-					if ("test-no-suffix-name-dev.properties".equals(args[0])
-							&& "test-group".equals(args[1])) {
-						return "test-no-suffix-assign=assign-dev-value-no-suffix-333";
-					}
-
-					if ("ext-json-test.json".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "{\n" + "    \"people\":{\n"
-								+ "        \"firstName\":\"Brett\",\n"
-								+ "        \"lastName\":\"McLaughlin\"\n" + "    }\n"
-								+ "}";
-					}
-
-					if ("ext-config-common02.properties".equals(args[0])
-							&& "GLOBAL_GROUP".equals(args[1])) {
-						return "global-ext-config=global-config-value-2";
-					}
-
-					if ("shared-data1.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "shared-name=shared-value-1";
-					}
-
-					if ("shared-data2.xml".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "<Server port=\"8005\" shutdown=\"SHUTDOWN\"> \n"
-								+ "    <Service name=\"Catalina\"> \n"
-								+ "        <Connector value=\"第二个连接器\"> \n"
-								+ "            <open>开启服务</open> \n"
-								+ "            <init>初始化一下</init> \n"
-								+ "            <process>\n" + "                <top>\n"
-								+ "                    <first>one</first>\n"
-								+ "                    <sencond value=\"two\">\n"
-								+ "                        <third>three</third>\n"
-								+ "                    </sencond>\n"
-								+ "                </top>\n" + "            </process> \n"
-								+ "            <destory>销毁一下</destory> \n"
-								+ "            <close>关闭服务</close> \n"
-								+ "        </Connector> \n" + "    </Service> \n"
-								+ "</Server> ";
-					}
-
-					return "";
-				}
-			});
+			NacosConfigService mockedNacosConfigService = Mockito
+					.mock(NacosConfigService.class);
+			when(mockedNacosConfigService.getConfig(any(), any(), anyLong()))
+					.thenAnswer(new Answer<String>() {
+						@Override
+						public String answer(InvocationOnMock invocationOnMock)
+								throws Throwable {
+							String dataId = invocationOnMock.getArgument(0, String.class);
+							String group = invocationOnMock.getArgument(1, String.class);
+							if ("app-no-suffix".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "test-no-suffix=value-no-suffix-1";
+							}
+							if ("app-no-suffix.properties".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "test-no-suffix=value-no-suffix-2";
+							}
+
+							if ("test-no-suffix-name".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "test-no-suffix-assign=assign-value-no-suffix-111";
+							}
+							if ("test-no-suffix-name.properties".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "test-no-suffix-assign=assign-value-no-suffix-222";
+							}
+							if ("test-no-suffix-name-dev.properties".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "test-no-suffix-assign=assign-dev-value-no-suffix-333";
+							}
+
+							if ("ext-json-test.json".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "{\n" + "    \"people\":{\n"
+										+ "        \"firstName\":\"Brett\",\n"
+										+ "        \"lastName\":\"McLaughlin\"\n"
+										+ "    }\n" + "}";
+							}
+
+							if ("ext-config-common02.properties".equals(dataId)
+									&& "GLOBAL_GROUP".equals(group)) {
+								return "global-ext-config=global-config-value-2";
+							}
+
+							if ("shared-data1.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "shared-name=shared-value-1";
+							}
+
+							if ("shared-data2.xml".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "<Server port=\"8005\" shutdown=\"SHUTDOWN\"> \n"
+										+ "    <Service name=\"Catalina\"> \n"
+										+ "        <Connector value=\"第二个连接器\"> \n"
+										+ "            <open>开启服务</open> \n"
+										+ "            <init>初始化一下</init> \n"
+										+ "            <process>\n"
+										+ "                <top>\n"
+										+ "                    <first>one</first>\n"
+										+ "                    <sencond value=\"two\">\n"
+										+ "                        <third>three</third>\n"
+										+ "                    </sencond>\n"
+										+ "                </top>\n"
+										+ "            </process> \n"
+										+ "            <destory>销毁一下</destory> \n"
+										+ "            <close>关闭服务</close> \n"
+										+ "        </Connector> \n" + "    </Service> \n"
+										+ "</Server> ";
+							}
+
+							return "";
+						}
+
+					});
+
+			ReflectionTestUtils.setField(NacosConfigManager.class, "service",
+					mockedNacosConfigService);
 
 		}
 		catch (Exception ignore) {
 			ignore.printStackTrace();
-
 		}
 	}
 
diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationTests.java b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationTests.java
index 1975d6b48..763c4a4cf 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationTests.java
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationTests.java
@@ -16,8 +16,6 @@
 
 package com.alibaba.cloud.nacos;
 
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.Method;
 import java.util.Map;
 
 import com.alibaba.cloud.nacos.client.NacosPropertySourceLocator;
@@ -25,14 +23,10 @@ import com.alibaba.cloud.nacos.endpoint.NacosConfigEndpoint;
 import com.alibaba.cloud.nacos.endpoint.NacosConfigEndpointAutoConfiguration;
 import com.alibaba.cloud.nacos.refresh.NacosRefreshHistory;
 import com.alibaba.nacos.client.config.NacosConfigService;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.powermock.api.mockito.PowerMockito;
-import org.powermock.api.support.MethodProxy;
-import org.powermock.core.classloader.annotations.PowerMockIgnore;
-import org.powermock.core.classloader.annotations.PrepareForTest;
-import org.powermock.modules.junit4.PowerMockRunner;
-import org.powermock.modules.junit4.PowerMockRunnerDelegate;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -40,21 +34,19 @@ import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.env.Environment;
-import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.util.ReflectionTestUtils;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.Mockito.when;
 import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.NONE;
 
 /**
- * TODO refactor, remove powermock.
  *
  * @author xiaojing
  * @author freeman
  */
-@RunWith(PowerMockRunner.class)
-@PowerMockIgnore("javax.management.*")
-@PowerMockRunnerDelegate(SpringRunner.class)
-@PrepareForTest({ NacosConfigService.class })
 @SpringBootTest(classes = NacosConfigurationTests.TestConfig.class, webEnvironment = NONE, properties = {
 		"spring.application.name=myTestService1", "spring.profiles.active=dev,test",
 		"spring.cloud.nacos.config.server-addr=127.0.0.1:8848",
@@ -72,53 +64,57 @@ import static org.springframework.boot.test.context.SpringBootTest.WebEnvironmen
 		"spring.cloud.nacos.config.shared-dataids=common1.properties,common2.properties",
 		"spring.cloud.nacos.config.accessKey=test-accessKey",
 		"spring.cloud.nacos.config.secretKey=test-secretKey",
-		"spring.cloud.bootstrap.enabled=true"
-})
+		"spring.cloud.bootstrap.enabled=true" })
 public class NacosConfigurationTests {
 
 	static {
 
 		try {
-
-			Method method = PowerMockito.method(NacosConfigService.class, "getConfig",
-					String.class, String.class, long.class);
-			MethodProxy.proxy(method, new InvocationHandler() {
-				@Override
-				public Object invoke(Object proxy, Method method, Object[] args)
-						throws Throwable {
-
-					if ("test-name.properties".equals(args[0])
-							&& "test-group".equals(args[1])) {
-						return "user.name=hello\nuser.age=12";
-					}
-
-					if ("test-name-dev.properties".equals(args[0])
-							&& "test-group".equals(args[1])) {
-						return "user.name=dev";
-					}
-
-					if ("ext-config-common01.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "test-ext-config1=config1\ntest-ext-config2=config1";
-					}
-					if ("ext-config-common02.properties".equals(args[0])
-							&& "GLOBAL_GROUP".equals(args[1])) {
-						return "test-ext-config2=config2";
-					}
-
-					if ("common1.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "test-common1=common1\ntest-common2=common1";
-					}
-
-					if ("common2.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "test-common2=common2";
-					}
-
-					return "";
-				}
-			});
+			NacosConfigService mockedNacosConfigService = Mockito
+					.mock(NacosConfigService.class);
+			when(mockedNacosConfigService.getConfig(any(), any(), anyLong()))
+					.thenAnswer(new Answer<String>() {
+						@Override
+						public String answer(InvocationOnMock invocationOnMock)
+								throws Throwable {
+							String dataId = invocationOnMock.getArgument(0, String.class);
+							String group = invocationOnMock.getArgument(1, String.class);
+							if ("test-name.properties".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "user.name=hello\nuser.age=12";
+							}
+
+							if ("test-name-dev.properties".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "user.name=dev";
+							}
+
+							if ("ext-config-common01.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "test-ext-config1=config1\ntest-ext-config2=config1";
+							}
+							if ("ext-config-common02.properties".equals(dataId)
+									&& "GLOBAL_GROUP".equals(group)) {
+								return "test-ext-config2=config2";
+							}
+
+							if ("common1.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "test-common1=common1\ntest-common2=common1";
+							}
+
+							if ("common2.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "test-common2=common2";
+							}
+
+							return "";
+						}
+
+					});
+
+			ReflectionTestUtils.setField(NacosConfigManager.class, "service",
+					mockedNacosConfigService);
 
 		}
 		catch (Exception ignore) {
diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationXmlJsonTest.java b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationXmlJsonTest.java
index 5accbcc91..e5350e608 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationXmlJsonTest.java
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosConfigurationXmlJsonTest.java
@@ -16,8 +16,6 @@
 
 package com.alibaba.cloud.nacos;
 
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.Method;
 import java.util.Map;
 
 import com.alibaba.cloud.nacos.client.NacosPropertySourceLocator;
@@ -25,14 +23,10 @@ import com.alibaba.cloud.nacos.endpoint.NacosConfigEndpoint;
 import com.alibaba.cloud.nacos.endpoint.NacosConfigEndpointAutoConfiguration;
 import com.alibaba.cloud.nacos.refresh.NacosRefreshHistory;
 import com.alibaba.nacos.client.config.NacosConfigService;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.powermock.api.mockito.PowerMockito;
-import org.powermock.api.support.MethodProxy;
-import org.powermock.core.classloader.annotations.PowerMockIgnore;
-import org.powermock.core.classloader.annotations.PrepareForTest;
-import org.powermock.modules.junit4.PowerMockRunner;
-import org.powermock.modules.junit4.PowerMockRunnerDelegate;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -40,22 +34,19 @@ import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.env.Environment;
-import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.util.ReflectionTestUtils;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.Mockito.when;
 import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.NONE;
 
 /**
- * TODO refactor, remove powermock.
  *
  * @author zkz
  * @author freeman
  */
-@RunWith(PowerMockRunner.class)
-@PowerMockIgnore({ "javax.management.*", "javax.xml.parsers.*",
-		"com.sun.org.apache.xerces.internal.jaxp.*", "org.w3c.dom.*" })
-@PowerMockRunnerDelegate(SpringRunner.class)
-@PrepareForTest({ NacosConfigService.class })
 @SpringBootTest(classes = NacosConfigurationXmlJsonTest.TestConfig.class, webEnvironment = NONE, properties = {
 		"spring.application.name=xmlApp", "spring.profiles.active=dev",
 		"spring.cloud.nacos.config.server-addr=127.0.0.1:8848",
@@ -73,97 +64,106 @@ import static org.springframework.boot.test.context.SpringBootTest.WebEnvironmen
 		"spring.cloud.nacos.config.shared-dataids=shared-data1.properties,shared-data.json",
 		"spring.cloud.nacos.config.accessKey=test-accessKey",
 		"spring.cloud.nacos.config.secretKey=test-secretKey",
-		"spring.cloud.bootstrap.enabled=true"
-})
+		"spring.cloud.bootstrap.enabled=true" })
 public class NacosConfigurationXmlJsonTest {
 
 	static {
 
 		try {
-
-			Method method = PowerMockito.method(NacosConfigService.class, "getConfig",
-					String.class, String.class, long.class);
-			MethodProxy.proxy(method, new InvocationHandler() {
-				@Override
-				public Object invoke(Object proxy, Method method, Object[] args)
-						throws Throwable {
-
-					if ("xmlApp.xml".equals(args[0]) && "test-group".equals(args[1])) {
-						return "<?xml version=\"1.0\" encoding=\"utf-8\"?>" + "<top>\n"
-								+ "    <first>one</first>\n"
-								+ "    <sencond value=\"two\">\n"
-								+ "        <third>three</third>\n" + "    </sencond>\n"
-								+ "</top>";
-					}
-					if ("test-name.xml".equals(args[0]) && "test-group".equals(args[1])) {
-						return "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
-								+ "<Server port=\"8005\" shutdown=\"SHUTDOWN\"> \n"
-								+ "    <Service name=\"Catalina\"> \n"
-								+ "        <Connector value=\"第二个连接器\"> \n"
-								+ "            <open>开启服务</open> \n"
-								+ "            <init>初始化一下</init> \n"
-								+ "            <process>\n" + "                <top>\n"
-								+ "                    <first>one</first>\n"
-								+ "                    <sencond value=\"two\">\n"
-								+ "                        <third>three</third>\n"
-								+ "                    </sencond>\n"
-								+ "                </top>\n" + "            </process> \n"
-								+ "            <destory>销毁一下</destory> \n"
-								+ "            <close>关闭服务</close> \n"
-								+ "        </Connector> \n" + "    </Service> \n"
-								+ "</Server> ";
-					}
-
-					if ("test-name-dev.xml".equals(args[0])
-							&& "test-group".equals(args[1])) {
-						return "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
-								+ "<application android:label=\"@string/app_name\" android:icon=\"@drawable/osg\">\n"
-								+ "    <activity android:name=\".osgViewer\"\n"
-								+ "              android:label=\"@string/app_name\" android:screenOrientation=\"landscape\">\n"
-								+ "        <intent-filter>\n"
-								+ "            <action android:name=\"android.intent.action.MAIN\" />\n"
-								+ "            <category android:name=\"android.intent.category.LAUNCHER\" />\n"
-								+ "        </intent-filter>\n" + "    </activity>\n"
-								+ "</application>";
-					}
-
-					if ("ext-json-test.json".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "{\n" + "    \"people\":{\n"
-								+ "        \"firstName\":\"Brett\",\n"
-								+ "        \"lastName\":\"McLaughlin\"\n" + "    }\n"
-								+ "}";
-					}
-
-					if ("ext-config-common02.properties".equals(args[0])
-							&& "GLOBAL_GROUP".equals(args[1])) {
-						return "global-ext-config=global-config-value-2";
-					}
-
-					if ("shared-data1.properties".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "shared-name=shared-value-1";
-					}
-
-					if ("shared-data.json".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "{\n" + "    \"test\" : {\n"
-								+ "        \"name\" : \"test\",\n"
-								+ "        \"list\" : [\n" + "            {\n"
-								+ "                \"name\" :\"listname1\",\n"
-								+ "                \"age\":1\n" + "            },\n"
-								+ "            {\n"
-								+ "                \"name\" :\"listname2\",\n"
-								+ "                \"age\":2\n" + "            }\n"
-								+ "        ],\n" + "        \"metadata\" : {\n"
-								+ "            \"intKey\" : 123,\n"
-								+ "            \"booleanKey\" : true\n" + "        }\n"
-								+ "    }\n" + "}";
-					}
-
-					return "";
-				}
-			});
+			NacosConfigService mockedNacosConfigService = Mockito
+					.mock(NacosConfigService.class);
+			when(mockedNacosConfigService.getConfig(any(), any(), anyLong()))
+					.thenAnswer(new Answer<String>() {
+						@Override
+						public String answer(InvocationOnMock invocationOnMock)
+								throws Throwable {
+							String dataId = invocationOnMock.getArgument(0, String.class);
+							String group = invocationOnMock.getArgument(1, String.class);
+							if ("xmlApp.xml".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
+										+ "<top>\n" + "    <first>one</first>\n"
+										+ "    <sencond value=\"two\">\n"
+										+ "        <third>three</third>\n"
+										+ "    </sencond>\n" + "</top>";
+							}
+							if ("test-name.xml".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
+										+ "<Server port=\"8005\" shutdown=\"SHUTDOWN\"> \n"
+										+ "    <Service name=\"Catalina\"> \n"
+										+ "        <Connector value=\"第二个连接器\"> \n"
+										+ "            <open>开启服务</open> \n"
+										+ "            <init>初始化一下</init> \n"
+										+ "            <process>\n"
+										+ "                <top>\n"
+										+ "                    <first>one</first>\n"
+										+ "                    <sencond value=\"two\">\n"
+										+ "                        <third>three</third>\n"
+										+ "                    </sencond>\n"
+										+ "                </top>\n"
+										+ "            </process> \n"
+										+ "            <destory>销毁一下</destory> \n"
+										+ "            <close>关闭服务</close> \n"
+										+ "        </Connector> \n" + "    </Service> \n"
+										+ "</Server> ";
+							}
+
+							if ("test-name-dev.xml".equals(dataId)
+									&& "test-group".equals(group)) {
+								return "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
+										+ "<application android:label=\"@string/app_name\" android:icon=\"@drawable/osg\">\n"
+										+ "    <activity android:name=\".osgViewer\"\n"
+										+ "              android:label=\"@string/app_name\" android:screenOrientation=\"landscape\">\n"
+										+ "        <intent-filter>\n"
+										+ "            <action android:name=\"android.intent.action.MAIN\" />\n"
+										+ "            <category android:name=\"android.intent.category.LAUNCHER\" />\n"
+										+ "        </intent-filter>\n"
+										+ "    </activity>\n" + "</application>";
+							}
+
+							if ("ext-json-test.json".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "{\n" + "    \"people\":{\n"
+										+ "        \"firstName\":\"Brett\",\n"
+										+ "        \"lastName\":\"McLaughlin\"\n"
+										+ "    }\n" + "}";
+							}
+
+							if ("ext-config-common02.properties".equals(dataId)
+									&& "GLOBAL_GROUP".equals(group)) {
+								return "global-ext-config=global-config-value-2";
+							}
+
+							if ("shared-data1.properties".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "shared-name=shared-value-1";
+							}
+
+							if ("shared-data.json".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "{\n" + "    \"test\" : {\n"
+										+ "        \"name\" : \"test\",\n"
+										+ "        \"list\" : [\n" + "            {\n"
+										+ "                \"name\" :\"listname1\",\n"
+										+ "                \"age\":1\n"
+										+ "            },\n" + "            {\n"
+										+ "                \"name\" :\"listname2\",\n"
+										+ "                \"age\":2\n"
+										+ "            }\n" + "        ],\n"
+										+ "        \"metadata\" : {\n"
+										+ "            \"intKey\" : 123,\n"
+										+ "            \"booleanKey\" : true\n"
+										+ "        }\n" + "    }\n" + "}";
+							}
+
+							return "";
+						}
+
+					});
+
+			ReflectionTestUtils.setField(NacosConfigManager.class, "service",
+					mockedNacosConfigService);
 
 		}
 		catch (Exception ignore) {
diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosFileExtensionTest.java b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosFileExtensionTest.java
index 11b2732c6..e5a6c17e1 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosFileExtensionTest.java
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/NacosFileExtensionTest.java
@@ -16,20 +16,13 @@
 
 package com.alibaba.cloud.nacos;
 
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.Method;
-
 import com.alibaba.cloud.nacos.endpoint.NacosConfigEndpointAutoConfiguration;
 import com.alibaba.nacos.client.config.NacosConfigService;
-import org.junit.Assert;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.powermock.api.mockito.PowerMockito;
-import org.powermock.api.support.MethodProxy;
-import org.powermock.core.classloader.annotations.PowerMockIgnore;
-import org.powermock.core.classloader.annotations.PrepareForTest;
-import org.powermock.modules.junit4.PowerMockRunner;
-import org.powermock.modules.junit4.PowerMockRunnerDelegate;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -37,45 +30,48 @@ import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.env.Environment;
-import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.util.ReflectionTestUtils;
 
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.Mockito.when;
 import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.NONE;
 
 /**
- * TODO refactor, remove powermock.
  *
  * @author xiaojing
  * @author freeman
  */
-
-@RunWith(PowerMockRunner.class)
-@PowerMockIgnore("javax.management.*")
-@PowerMockRunnerDelegate(SpringRunner.class)
-@PrepareForTest({ NacosConfigService.class })
 @SpringBootTest(classes = NacosFileExtensionTest.TestConfig.class, webEnvironment = NONE, properties = {
 		"spring.application.name=test-name",
 		"spring.cloud.nacos.config.server-addr=127.0.0.1:8848",
 		"spring.cloud.nacos.config.file-extension=yaml",
-		"spring.cloud.bootstrap.enabled=true"
-})
+		"spring.cloud.bootstrap.enabled=true" })
 public class NacosFileExtensionTest {
 
 	static {
 
 		try {
-			Method method = PowerMockito.method(NacosConfigService.class, "getConfig",
-					String.class, String.class, long.class);
-			MethodProxy.proxy(method, new InvocationHandler() {
-				@Override
-				public Object invoke(Object proxy, Method method, Object[] args)
-						throws Throwable {
-					if ("test-name.yaml".equals(args[0])
-							&& "DEFAULT_GROUP".equals(args[1])) {
-						return "user:\n  name: hello\n  age: 12\n---\nuser:\n  gender: male";
-					}
-					return "";
-				}
-			});
+			NacosConfigService mockedNacosConfigService = Mockito
+					.mock(NacosConfigService.class);
+			when(mockedNacosConfigService.getConfig(any(), any(), anyLong()))
+					.thenAnswer(new Answer<String>() {
+						@Override
+						public String answer(InvocationOnMock invocationOnMock)
+								throws Throwable {
+							String dataId = invocationOnMock.getArgument(0, String.class);
+							String group = invocationOnMock.getArgument(1, String.class);
+							if ("test-name.yaml".equals(dataId)
+									&& "DEFAULT_GROUP".equals(group)) {
+								return "user:\n  name: hello\n  age: 12\n---\nuser:\n  gender: male";
+							}
+							return "";
+						}
+
+					});
+
+			ReflectionTestUtils.setField(NacosConfigManager.class, "service",
+					mockedNacosConfigService);
 
 		}
 		catch (Exception ignore) {
@@ -90,9 +86,9 @@ public class NacosFileExtensionTest {
 	@Test
 	public void contextLoads() throws Exception {
 
-		Assert.assertEquals(environment.getProperty("user.name"), "hello");
-		Assert.assertEquals(environment.getProperty("user.age"), "12");
-		Assert.assertEquals(environment.getProperty("user.gender"), "male");
+		Assertions.assertEquals(environment.getProperty("user.name"), "hello");
+		Assertions.assertEquals(environment.getProperty("user.age"), "12");
+		Assertions.assertEquals(environment.getProperty("user.gender"), "male");
 	}
 
 	@Configuration
diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/endpoint/NacosConfigEndpointTests.java b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/endpoint/NacosConfigEndpointTests.java
index f1c364f05..c278ad1f4 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/endpoint/NacosConfigEndpointTests.java
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-nacos-config/src/test/java/com/alibaba/cloud/nacos/endpoint/NacosConfigEndpointTests.java
@@ -16,22 +16,13 @@
 
 package com.alibaba.cloud.nacos.endpoint;
 
-import java.lang.reflect.Method;
 import java.util.Map;
 
 import com.alibaba.cloud.nacos.NacosConfigAutoConfiguration;
 import com.alibaba.cloud.nacos.NacosConfigBootstrapConfiguration;
 import com.alibaba.cloud.nacos.NacosConfigProperties;
 import com.alibaba.cloud.nacos.refresh.NacosRefreshHistory;
-import com.alibaba.nacos.client.config.NacosConfigService;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.powermock.api.mockito.PowerMockito;
-import org.powermock.api.support.MethodProxy;
-import org.powermock.core.classloader.annotations.PowerMockIgnore;
-import org.powermock.core.classloader.annotations.PrepareForTest;
-import org.powermock.modules.junit4.PowerMockRunner;
-import org.powermock.modules.junit4.PowerMockRunnerDelegate;
+import org.junit.jupiter.api.Test;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.actuate.health.Health.Builder;
@@ -39,44 +30,22 @@ import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.test.context.junit4.SpringRunner;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.NONE;
 
 /**
- * TODO refactor, remove powermock.
  *
  * @author xiaojing
  * @author freeman
  */
-@RunWith(PowerMockRunner.class)
-@PowerMockIgnore("javax.management.*")
-@PowerMockRunnerDelegate(SpringRunner.class)
-@PrepareForTest({ NacosConfigService.class })
 @SpringBootTest(classes = NacosConfigEndpointTests.TestConfig.class, webEnvironment = NONE, properties = {
 		"spring.application.name=test-name",
 		"spring.cloud.nacos.config.server-addr=127.0.0.1:8848",
 		"spring.cloud.nacos.config.file-extension=properties",
-		"spring.cloud.bootstrap.enabled=true"
-})
+		"spring.cloud.bootstrap.enabled=true" })
 public class NacosConfigEndpointTests {
 
-	static {
-
-		try {
-
-			Method method = PowerMockito.method(NacosConfigService.class,
-					"getServerStatus");
-			MethodProxy.proxy(method, (proxy, method1, args) -> "UP");
-
-		}
-		catch (Exception ignore) {
-			ignore.printStackTrace();
-
-		}
-	}
-
 	@Autowired
 	private NacosConfigProperties properties;