diff --git a/skywalking-sniffer/skywalking-api/src/test/java/com/a/eye/skywalking/api/conf/SnifferConfigInitializerTest.java b/skywalking-sniffer/skywalking-api/src/test/java/com/a/eye/skywalking/api/conf/SnifferConfigInitializerTest.java
index da1bc5e01..64ae18e7d 100644
--- a/skywalking-sniffer/skywalking-api/src/test/java/com/a/eye/skywalking/api/conf/SnifferConfigInitializerTest.java
+++ b/skywalking-sniffer/skywalking-api/src/test/java/com/a/eye/skywalking/api/conf/SnifferConfigInitializerTest.java
@@ -1,9 +1,10 @@
 package com.a.eye.skywalking.api.conf;
 
+import org.junit.AfterClass;
 import org.junit.Assert;
 import org.junit.Test;
 
-import static com.a.eye.skywalking.api.logging.LogLevel.INFO;
+import static com.a.eye.skywalking.api.logging.LogLevel.*;
 
 /**
  * @author wusheng
@@ -24,4 +25,9 @@ public class SnifferConfigInitializerTest {
         Assert.assertNotNull(Config.Logging.FILE_NAME);
         Assert.assertEquals(INFO, Config.Logging.LEVEL);
     }
+
+    @AfterClass
+    public static void clear(){
+        Config.Logging.LEVEL = DEBUG;
+    }
 }