diff --git a/plusone-validator/src/test/java/xyz/zhouxy/plusone/example/validator/BaseValidatorTest.java b/plusone-validator/src/test/java/xyz/zhouxy/plusone/example/validator/BaseValidatorTest.java
index 945bed3..36bfc5f 100644
--- a/plusone-validator/src/test/java/xyz/zhouxy/plusone/example/validator/BaseValidatorTest.java
+++ b/plusone-validator/src/test/java/xyz/zhouxy/plusone/example/validator/BaseValidatorTest.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023-2025 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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 xyz.zhouxy.plusone.example.validator;
 
 import static org.junit.jupiter.api.Assertions.*;
diff --git a/plusone-validator/src/test/java/xyz/zhouxy/plusone/example/validator/ValidatorTests.java b/plusone-validator/src/test/java/xyz/zhouxy/plusone/example/validator/ValidatorTests.java
index 57d3fb5..1ad07b5 100644
--- a/plusone-validator/src/test/java/xyz/zhouxy/plusone/example/validator/ValidatorTests.java
+++ b/plusone-validator/src/test/java/xyz/zhouxy/plusone/example/validator/ValidatorTests.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2024-2025 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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 xyz.zhouxy.plusone.example.validator;
 
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;