diff --git a/src/test/java/xyz/zhouxy/plusone/commons/EnumerationTests.java b/src/test/java/xyz/zhouxy/plusone/commons/EnumerationTests.java
index 79ba044..1aaf835 100644
--- a/src/test/java/xyz/zhouxy/plusone/commons/EnumerationTests.java
+++ b/src/test/java/xyz/zhouxy/plusone/commons/EnumerationTests.java
@@ -3,17 +3,19 @@ package xyz.zhouxy.plusone.commons;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import com.google.common.collect.Lists;
-import lombok.extern.slf4j.Slf4j;
 import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import xyz.zhouxy.plusone.commons.util.Enumeration;
 
 import javax.annotation.Nonnull;
 import java.util.Collection;
 
-@Slf4j
 class EnumerationTests {
 
+    private static final Logger log = LoggerFactory.getLogger(EnumerationTests.class);
+
     @Test
     void testEnumeration() {
         assertTrue(EntityStatus.AVAILABLE == EntityStatus.of(0));
diff --git a/src/test/java/xyz/zhouxy/plusone/commons/util/NumberUtilTest.java b/src/test/java/xyz/zhouxy/plusone/commons/util/NumberUtilTest.java
index 3c42b12..1b71e08 100644
--- a/src/test/java/xyz/zhouxy/plusone/commons/util/NumberUtilTest.java
+++ b/src/test/java/xyz/zhouxy/plusone/commons/util/NumberUtilTest.java
@@ -3,11 +3,13 @@ package xyz.zhouxy.plusone.commons.util;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
-import lombok.extern.slf4j.Slf4j;
 import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
-@Slf4j
 class NumberUtilTest {
+    private static final Logger log = LoggerFactory.getLogger(NumberUtilTest.class);
+
     @Test
     void testSum() {
         long result = 0;