diff --git a/microsphere-spring-cloud-commons/pom.xml b/microsphere-spring-cloud-commons/pom.xml
index a9e9c7f..f4ce6fa 100644
--- a/microsphere-spring-cloud-commons/pom.xml
+++ b/microsphere-spring-cloud-commons/pom.xml
@@ -86,10 +86,22 @@
         </dependency>
 
         <!-- Testing -->
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.junit.vintage</groupId>
+                    <artifactId>junit-vintage-engine</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
 
         <!-- Testcontainers -->
diff --git a/microsphere-spring-cloud-commons/src/main/java/io/microsphere/spring/cloud/client/event/ServiceInstancesChangedEvent.java b/microsphere-spring-cloud-commons/src/main/java/io/microsphere/spring/cloud/client/event/ServiceInstancesChangedEvent.java
index e13600c..95e6c25 100644
--- a/microsphere-spring-cloud-commons/src/main/java/io/microsphere/spring/cloud/client/event/ServiceInstancesChangedEvent.java
+++ b/microsphere-spring-cloud-commons/src/main/java/io/microsphere/spring/cloud/client/event/ServiceInstancesChangedEvent.java
@@ -16,24 +16,19 @@
  */
 package io.microsphere.spring.cloud.client.event;
 
-/**
- * TODO Comment
- *
- * @author <a href="mailto:mercyblitz@gmail.com">Mercy</a>
- * @since TODO
- */
-
 import org.springframework.cloud.client.ServiceInstance;
 import org.springframework.context.ApplicationEvent;
 import org.springframework.context.event.ApplicationEventMulticaster;
 import org.springframework.context.event.SimpleApplicationEventMulticaster;
+import org.springframework.util.Assert;
 
 import java.util.List;
 
 import static java.util.Collections.unmodifiableList;
+import static org.springframework.util.Assert.notEmpty;
 
 /**
- * An event raised after the {@link ServiceInstance instances} of one service has been
+ * An event raised when the {@link ServiceInstance instances} of one service has been
  * changed.
  *
  * @author <a href="mailto:mercyblitz@gmail.com">Mercy</a>
@@ -58,6 +53,7 @@ public class ServiceInstancesChangedEvent extends ApplicationEvent {
     public ServiceInstancesChangedEvent(String serviceName,
                                         List<ServiceInstance> serviceInstances) {
         super(serviceName);
+        notEmpty(serviceInstances, () -> "The arguments 'serviceInstances' must not be empty!");
         this.serviceInstances = unmodifiableList(serviceInstances);
     }
 
diff --git a/microsphere-spring-cloud-commons/src/test/java/io/microsphere/spring/cloud/client/event/ServiceInstancesChangedEventTest.java b/microsphere-spring-cloud-commons/src/test/java/io/microsphere/spring/cloud/client/event/ServiceInstancesChangedEventTest.java
new file mode 100644
index 0000000..63d6403
--- /dev/null
+++ b/microsphere-spring-cloud-commons/src/test/java/io/microsphere/spring/cloud/client/event/ServiceInstancesChangedEventTest.java
@@ -0,0 +1,68 @@
+package io.microsphere.spring.cloud.client.event;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.cloud.client.DefaultServiceInstance;
+import org.springframework.cloud.client.ServiceInstance;
+
+import java.net.URI;
+import java.util.Arrays;
+import java.util.UUID;
+
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * {@link ServiceInstancesChangedEvent} Test
+ *
+ * @author <a href="mailto:mercyblitz@gmail.com">Mercy<a/>
+ * @see ServiceInstancesChangedEvent
+ * @since 1.0.0
+ */
+public class ServiceInstancesChangedEventTest {
+
+    private String serviceName = "testService";
+
+    private ServiceInstancesChangedEvent event;
+
+    private ServiceInstance instance;
+
+    @BeforeEach
+    public void init() {
+        this.instance = createInstance(serviceName);
+        this.event = new ServiceInstancesChangedEvent(serviceName, Arrays.asList(instance));
+    }
+
+    private ServiceInstance createInstance(String serviceName) {
+        DefaultServiceInstance instance = new DefaultServiceInstance();
+        instance.setServiceId(serviceName);
+        instance.setServiceId(UUID.randomUUID().toString());
+        instance.setHost("127.0.0.1");
+        instance.setPort(8080);
+        instance.setUri(URI.create("http://127.0.0.1:8080/info"));
+        return instance;
+    }
+
+    @Test
+    public void testGetServiceName() {
+        assertEquals(this.serviceName, this.event.getServiceName());
+        assertEquals(this.serviceName, this.event.getSource());
+    }
+
+    @Test
+    public void testGetServiceInstances() {
+        assertEquals(Arrays.asList(this.instance), this.event.getServiceInstances());
+        assertEquals(this.instance, this.event.getServiceInstances().get(0));
+        assertSame(this.instance, this.event.getServiceInstances().get(0));
+    }
+
+    @Test
+    public void testProcessed() {
+        assertFalse(this.event.isProcessed());
+        this.event.processed();
+        assertTrue(this.event.isProcessed());
+    }
+}
\ No newline at end of file
diff --git a/microsphere-spring-cloud-commons/src/test/java/io/microsphere/spring/cloud/client/service/registry/autoconfigure/ServiceRegistryAutoConfigurationTest.java b/microsphere-spring-cloud-commons/src/test/java/io/microsphere/spring/cloud/client/service/registry/autoconfigure/ServiceRegistryAutoConfigurationTest.java
new file mode 100644
index 0000000..5b09845
--- /dev/null
+++ b/microsphere-spring-cloud-commons/src/test/java/io/microsphere/spring/cloud/client/service/registry/autoconfigure/ServiceRegistryAutoConfigurationTest.java
@@ -0,0 +1,14 @@
+package io.microsphere.spring.cloud.client.service.registry.autoconfigure;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * {@link ServiceRegistryAutoConfiguration} Test
+ *
+ * @author <a href="mailto:mercyblitz@gmail.com">Mercy<a/>
+ * @see ServiceRegistryAutoConfiguration
+ * @since 1.0.0
+ */
+public class ServiceRegistryAutoConfigurationTest {
+
+}
\ No newline at end of file
diff --git a/microsphere-spring-cloud-openfeign/pom.xml b/microsphere-spring-cloud-openfeign/pom.xml
index be05c2c..d750450 100644
--- a/microsphere-spring-cloud-openfeign/pom.xml
+++ b/microsphere-spring-cloud-openfeign/pom.xml
@@ -50,16 +50,23 @@
             <optional>true</optional>
         </dependency>
 
+        <!-- Testing -->
         <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-test</artifactId>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
             <scope>test</scope>
         </dependency>
 
         <dependency>
-            <groupId>org.springframework.cloud</groupId>
-            <artifactId>spring-cloud-starter-loadbalancer</artifactId>
-            <optional>true</optional>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.junit.vintage</groupId>
+                    <artifactId>junit-vintage-engine</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
 
     </dependencies>
diff --git a/microsphere-spring-cloud-openfeign/src/main/java/io/microsphere/spring/cloud/openfeign/autoconfigure/EnableFeignAutoRefresh.java b/microsphere-spring-cloud-openfeign/src/main/java/io/microsphere/spring/cloud/openfeign/autoconfigure/EnableFeignAutoRefresh.java
index 1587b12..7433fb0 100644
--- a/microsphere-spring-cloud-openfeign/src/main/java/io/microsphere/spring/cloud/openfeign/autoconfigure/EnableFeignAutoRefresh.java
+++ b/microsphere-spring-cloud-openfeign/src/main/java/io/microsphere/spring/cloud/openfeign/autoconfigure/EnableFeignAutoRefresh.java
@@ -19,7 +19,7 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE})
 @Documented
-@Import(FeignClientAutoRefreshAutoConfiguration.class)
+@Import(EnableFeignAutoRefresh.Marker.class)
 public @interface EnableFeignAutoRefresh {
 
     class Marker {