diff --git a/infra/common/src/main/java/cn/hippo4j/common/toolkit/JoinerTest.java b/infra/common/src/main/java/cn/hippo4j/common/toolkit/JoinerTest.java
deleted file mode 100644
index e8df954a..00000000
--- a/infra/common/src/main/java/cn/hippo4j/common/toolkit/JoinerTest.java
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package cn.hippo4j.common.toolkit;
-
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.Test;
-import java.io.IOException;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.Iterator;
-
-public class JoinerTest {
-
-    private Joiner joiner;
-
-    @Before
-    public void init() {
-        joiner = Joiner.on(",");
-    }
-
-    @Test
-    public void testJoinWithSeparator() {
-        Assert.assertEquals("a,b,c", joiner.join(Arrays.asList("a", "b", "c")));
-        Assert.assertEquals("1,2,3", joiner.join(Arrays.asList(1, 2, 3)));
-        Assert.assertEquals("true,false,true", joiner.join(Arrays.asList(true, false, true)));
-    }
-
-    @Test
-    public void testJoinWithEmptyIterable() {
-        Assert.assertEquals("", joiner.join(Collections.emptyList()));
-    }
-
-    @Test
-    public void testJoinWithSingleElement() {
-        Assert.assertEquals("a", joiner.join(Collections.singletonList("a")));
-        Assert.assertEquals("1", joiner.join(Collections.singletonList(1)));
-        Assert.assertEquals("true", joiner.join(Collections.singletonList(true)));
-    }
-
-    @Test
-    public void testJoinWithCustomObject() {
-        Person person1 = new Person("Alice", 18);
-        Person person2 = new Person("Bob", 20);
-        Assert.assertEquals("Alice(18),Bob(20)", Joiner.on(",").join(Arrays.asList(person1, person2)));
-    }
-
-    private static class Person {
-        private String name;
-        private int age;
-
-        public Person(String name, int age) {
-            this.name = name;
-            this.age = age;
-        }
-
-        @Override
-        public String toString() {
-            return name + "(" + age + ")";
-        }
-    }
-
-    @Test(expected = NullPointerException.class)
-    public void testJoinWithNullIterator() {
-        Joiner.on(", ").join((Iterator<?>) null);
-    }
-
-    @Test(expected = NullPointerException.class)
-    public void testAppendToWithNullStringBuilder() throws IOException {
-        Joiner.on(", ").appendTo(null, Arrays.asList("a", "b").iterator());
-    }
-
-    @Test(expected = NullPointerException.class)
-    public void testAppendToWithNullAppendable() throws IOException {
-        Joiner.on(", ").appendTo(null, Arrays.asList("a", "b").iterator());
-    }
-}