diff --git a/core/src/test/java/com/alibaba/nacos/core/remote/grpc/negotiator/tls/DefaultTlsContextBuilderTest.java b/core/src/test/java/com/alibaba/nacos/core/remote/grpc/negotiator/tls/DefaultTlsContextBuilderTest.java
index 7a8224bb779..f947a367a83 100644
--- a/core/src/test/java/com/alibaba/nacos/core/remote/grpc/negotiator/tls/DefaultTlsContextBuilderTest.java
+++ b/core/src/test/java/com/alibaba/nacos/core/remote/grpc/negotiator/tls/DefaultTlsContextBuilderTest.java
@@ -18,14 +18,23 @@
 
 import com.alibaba.nacos.api.exception.runtime.NacosRuntimeException;
 import com.alibaba.nacos.core.remote.tls.RpcServerTlsConfig;
+import com.alibaba.nacos.sys.env.EnvUtil;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.mock.env.MockEnvironment;
+
+import java.lang.reflect.Field;
 
 public class DefaultTlsContextBuilderTest {
     
+    private ConfigurableEnvironment environment;
+    
     @Before
     public void setUp() throws Exception {
+        environment = new MockEnvironment();
+        EnvUtil.setEnvironment(environment);
         RpcServerTlsConfig.getInstance().setEnableTls(true);
     }
     
@@ -40,6 +49,7 @@ public void tearDown() throws Exception {
         RpcServerTlsConfig.getInstance().setProtocols(null);
         RpcServerTlsConfig.getInstance().setTrustCollectionCertFile(null);
         RpcServerTlsConfig.getInstance().setSslProvider("");
+        clearRpcServerTlsConfigInstance();
     }
     
     @Test(expected = IllegalArgumentException.class)
@@ -101,4 +111,10 @@ public void testGetSslContextForNonExistFile() {
         grpcServerConfig.setCertChainFile("non-exist-cert.pem");
         DefaultTlsContextBuilder.getSslContext(RpcServerTlsConfig.getInstance());
     }
+    
+    private static void clearRpcServerTlsConfigInstance() throws Exception {
+        Field instanceField = RpcServerTlsConfig.class.getDeclaredField("instance");
+        instanceField.setAccessible(true);
+        instanceField.set(null, null);
+    }
 }
\ No newline at end of file
diff --git a/core/src/test/java/com/alibaba/nacos/core/remote/grpc/negotiator/tls/DefaultTlsProtocolNegotiatorBuilderTest.java b/core/src/test/java/com/alibaba/nacos/core/remote/grpc/negotiator/tls/DefaultTlsProtocolNegotiatorBuilderTest.java
index ac8be81b618..24e0a6fd782 100644
--- a/core/src/test/java/com/alibaba/nacos/core/remote/grpc/negotiator/tls/DefaultTlsProtocolNegotiatorBuilderTest.java
+++ b/core/src/test/java/com/alibaba/nacos/core/remote/grpc/negotiator/tls/DefaultTlsProtocolNegotiatorBuilderTest.java
@@ -17,19 +17,28 @@
 package com.alibaba.nacos.core.remote.grpc.negotiator.tls;
 
 import com.alibaba.nacos.core.remote.tls.RpcServerTlsConfig;
+import com.alibaba.nacos.sys.env.EnvUtil;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.mock.env.MockEnvironment;
+
+import java.lang.reflect.Field;
 
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 
 public class DefaultTlsProtocolNegotiatorBuilderTest {
     
+    private ConfigurableEnvironment environment;
+    
     private DefaultTlsProtocolNegotiatorBuilder builder;
     
     @Before
     public void setUp() throws Exception {
+        environment = new MockEnvironment();
+        EnvUtil.setEnvironment(environment);
         builder = new DefaultTlsProtocolNegotiatorBuilder();
     }
     
@@ -38,6 +47,7 @@ public void tearDown() throws Exception {
         RpcServerTlsConfig.getInstance().setEnableTls(false);
         RpcServerTlsConfig.getInstance().setCertChainFile(null);
         RpcServerTlsConfig.getInstance().setCertPrivateKey(null);
+        clearRpcServerTlsConfigInstance();
     }
     
     @Test
@@ -52,4 +62,10 @@ public void testBuildEnabled() {
         RpcServerTlsConfig.getInstance().setCertChainFile("test-server-cert.pem");
         assertNotNull(builder.build());
     }
+    
+    private static void clearRpcServerTlsConfigInstance() throws Exception {
+        Field instanceField = RpcServerTlsConfig.class.getDeclaredField("instance");
+        instanceField.setAccessible(true);
+        instanceField.set(null, null);
+    }
 }
\ No newline at end of file