diff --git a/phpunit/code/class-method-override-order.php b/phpunit/code/class-method-override-order.php
new file mode 100644
index 00000000..b1468ad5
--- /dev/null
+++ b/phpunit/code/class-method-override-order.php
@@ -0,0 +1,22 @@
+<?php
+// 子类先于父类定义，测试 classMethodOverride 的双向递归是否正确
+class ChildOverride extends ParentBase {
+    public function bar(): void {
+        echo "Child\n";
+    }
+}
+
+class ParentBase {
+    public function run(): void {
+        $this->bar();
+    }
+
+    public function bar(): void {
+        echo "Parent\n";
+    }
+}
+
+function main(): void {
+    $o = new ChildOverride();
+    $o->run();
+}
diff --git a/phpunit/src/ClassMethodOverrideTest.php b/phpunit/src/ClassMethodOverrideTest.php
new file mode 100644
index 00000000..f7f4e773
--- /dev/null
+++ b/phpunit/src/ClassMethodOverrideTest.php
@@ -0,0 +1,28 @@
+<?php
+
+use PhpAot\Php\CompilerTest;
+
+class ClassMethodOverrideTest extends \BaseTest
+{
+    public function testChildBeforeParentOverride(): void
+    {
+        $compiler = CompilerTest::create(ROOT_PATH);
+        $testFile = __DIR__ . '/../code/class-method-override-order.php';
+        $compiler->addFiles([$testFile]);
+        $compiler->prepareFile($testFile);
+
+        $ref = new ReflectionClass($compiler);
+        $prop = $ref->getProperty('classMethodOverride');
+        $classMethodOverride = $prop->getValue($compiler);
+
+        $parentMethodLower = strtolower('ParentBase::bar');
+        $childMethodLower = strtolower('ChildOverride::bar');
+
+        $this->assertArrayHasKey($parentMethodLower, $classMethodOverride, 'ParentBase::bar should be registered');
+        $this->assertArrayHasKey($childMethodLower, $classMethodOverride, 'ChildOverride::bar should be registered');
+        // 父类方法应被标记为已被子类覆盖
+        $this->assertTrue($classMethodOverride[$parentMethodLower], 'ParentBase::bar should be marked as overridden by child');
+        // 子类方法未被覆盖
+        $this->assertFalse($classMethodOverride[$childMethodLower], 'ChildOverride::bar should not be marked as overridden');
+    }
+}