diff --git a/phpunit.xml b/phpunit.xml
index e7a03b02..ada6b8e4 100755
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,17 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit backupGlobals="false"
-         backupStaticAttributes="false"
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         backupGlobals="false"
+         backupStaticProperties="false"
          bootstrap="vendor/autoload.php"
          colors="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
+
          processIsolation="false"
-         stopOnFailure="false">
-    <testsuites>
-        <testsuite name="overtrue/pinyin Test Suite (All PHP version)">
-            <directory>./tests/</directory>
-            <exclude>./tests/*.php</exclude>
-        </testsuite>
-    </testsuites>
+         stopOnFailure="false"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.4/phpunit.xsd"
+         cacheDirectory=".phpunit.result.cache"
+         >
+  <testsuites>
+    <testsuite name="overtrue/pinyin Test Suite (All PHP version)">
+      <directory>./tests/</directory>
+      <exclude>./tests/*.php</exclude>
+    </testsuite>
+  </testsuites>
 </phpunit>
diff --git a/src/Collection.php b/src/Collection.php
index 478cd748..cf21ba78 100644
--- a/src/Collection.php
+++ b/src/Collection.php
@@ -56,7 +56,7 @@ public function offsetGet(mixed $offset): mixed
 
     public function offsetSet(mixed $offset, mixed $value): void
     {
-        if (null === $offset) {
+        if ($offset === null) {
             $this->items[] = $value;
         } else {
             $this->items[$offset] = $value;
diff --git a/src/Converter.php b/src/Converter.php
index 9a8c39c6..ffa4f0f0 100644
--- a/src/Converter.php
+++ b/src/Converter.php
@@ -174,7 +174,7 @@ public function convert(string $string, callable $beforeSplit = null): Collectio
         }, $string);
 
         // 过滤掉不保留的字符
-        if (!$this->keepOtherCharacters) {
+        if (! $this->keepOtherCharacters) {
             $string = \preg_replace(\sprintf('~[^%s]~u', \implode($this->regexps)), '', $string);
         }
 
diff --git a/tests/benchmark.php b/tests/benchmark.php
index 9f9ea40d..e3fd77f0 100644
--- a/tests/benchmark.php
+++ b/tests/benchmark.php
@@ -3,6 +3,7 @@
 require __DIR__.'/../vendor/autoload.php';
 
 use Overtrue\Pinyin\Pinyin;
+
 use function Termwind\{render};
 
 $totalStart = microtime(true);