diff --git a/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/ArrayUtilTest.java b/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/ArrayUtilTest.java
index 358dfd9f..3a314c4d 100644
--- a/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/ArrayUtilTest.java
+++ b/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/ArrayUtilTest.java
@@ -19,11 +19,8 @@ package cn.hippo4j.common.toolkit;
 
 import cn.hippo4j.common.function.Matcher;
 import com.google.common.base.Strings;
-import org.checkerframework.checker.units.qual.A;
 import org.junit.Test;
 
-import java.lang.reflect.Array;
-
 public class ArrayUtilTest {
 
     @Test
@@ -41,13 +38,10 @@ public class ArrayUtilTest {
     @Test
     public void assertFirstMatch() {
         Matcher<String> matcher = (str) -> "1".equalsIgnoreCase(str);
-
         String[] array = new String[0];
         Assert.isTrue(Strings.isNullOrEmpty(ArrayUtil.firstMatch(matcher, array)));
-
         array = new String[]{"0"};
         Assert.isTrue(Strings.isNullOrEmpty(ArrayUtil.firstMatch(matcher, array)));
-
         array = new String[]{"1"};
         Assert.isTrue(!Strings.isNullOrEmpty(ArrayUtil.firstMatch(matcher, array)));
     }
@@ -57,14 +51,12 @@ public class ArrayUtilTest {
         String[] array = new String[]{"1"};
         Assert.isTrue(ArrayUtil.addAll(array, null).length == 1);
         Assert.isTrue(ArrayUtil.addAll(null, array).length == 1);
-
         Assert.isTrue(ArrayUtil.addAll(array, new String[]{"1"}).length == 2);
     }
 
     @Test
     public void assertClone() {
         Assert.isNull(ArrayUtil.clone(null));
-
         String[] array = new String[0];
         Assert.isTrue(array != ArrayUtil.clone(array));
         Assert.isTrue(array.length == ArrayUtil.clone(array).length);
diff --git a/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/CollectionUtilTest.java b/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/CollectionUtilTest.java
index b0be6add..78715122 100644
--- a/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/CollectionUtilTest.java
+++ b/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/CollectionUtilTest.java
@@ -30,7 +30,6 @@ public class CollectionUtilTest {
     @Test
     public void assertGetFirst() {
         Assert.isNull(CollectionUtil.getFirst(null));
-
         String first = CollectionUtil.getFirst(Lists.newArrayList("1", "2"));
         Assert.notEmpty(first);
     }
@@ -39,28 +38,20 @@ public class CollectionUtilTest {
     public void assertIsEmpty() {
         List list = null;
         Assert.isTrue(CollectionUtil.isEmpty(list));
-
         list = Lists.newArrayList();
         Assert.isTrue(CollectionUtil.isEmpty(list));
-
         list = Lists.newArrayList("1");
         Assert.isTrue(!CollectionUtil.isEmpty(list));
-
         Map map = null;
         Assert.isTrue(CollectionUtil.isEmpty(map));
-
         map = Maps.newHashMap();
         Assert.isTrue(CollectionUtil.isEmpty(map));
-
         map.put("key", "value");
         Assert.isTrue(!CollectionUtil.isEmpty(map));
-
         Iterator iterator = null;
         Assert.isTrue(CollectionUtil.isEmpty(iterator));
-
         iterator = Lists.emptyList().iterator();
         Assert.isTrue(CollectionUtil.isEmpty(iterator));
-
         iterator = Lists.newArrayList("1").iterator();
         Assert.isTrue(!CollectionUtil.isEmpty(iterator));
     }
@@ -69,28 +60,20 @@ public class CollectionUtilTest {
     public void assertIsNotEmpty() {
         List list = null;
         Assert.isTrue(!CollectionUtil.isNotEmpty(list));
-
         list = Lists.newArrayList();
         Assert.isTrue(!CollectionUtil.isNotEmpty(list));
-
         list = Lists.newArrayList("1");
         Assert.isTrue(CollectionUtil.isNotEmpty(list));
-
         Map map = null;
         Assert.isTrue(!CollectionUtil.isNotEmpty(map));
-
         map = Maps.newHashMap();
         Assert.isTrue(!CollectionUtil.isNotEmpty(map));
-
         map.put("key", "value");
         Assert.isTrue(CollectionUtil.isNotEmpty(map));
-
         Iterator iterator = null;
         Assert.isTrue(!CollectionUtil.isNotEmpty(iterator));
-
         iterator = Lists.emptyList().iterator();
         Assert.isTrue(!CollectionUtil.isNotEmpty(iterator));
-
         iterator = Lists.newArrayList("1").iterator();
         Assert.isTrue(CollectionUtil.isNotEmpty(iterator));
     }
diff --git a/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/JSONUtilTest.java b/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/JSONUtilTest.java
index d52a684f..1bb988d0 100644
--- a/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/JSONUtilTest.java
+++ b/hippo4j-common/src/test/java/cn/hippo4j/common/toolkit/JSONUtilTest.java
@@ -31,8 +31,11 @@ import java.util.List;
 public class JSONUtilTest {
 
     private static final Foo EXPECTED_FOO = new Foo(1, "foo1", new Foo(2, "foo2", null));
+
     private static final List<Foo> EXPECTED_FOO_ARRAY = Arrays.asList(EXPECTED_FOO, EXPECTED_FOO);
+
     private static final String EXPECTED_FOO_JSON = "{\"id\":1,\"name\":\"foo1\",\"foo\":{\"id\":2,\"name\":\"foo2\"}}";
+
     private static final String EXPECTED_FOO_JSON_ARRAY = "[" + EXPECTED_FOO_JSON + "," + EXPECTED_FOO_JSON + "]";
 
     @Test
@@ -76,8 +79,9 @@ public class JSONUtilTest {
     private static class Foo {
 
         private Integer id;
+
         private String name;
+
         private Foo foo;
     }
-
 }