diff --git a/argi-graph-core/src/test/java/io/github/agentic/ai/graph/CloneStateKeyStrategyPollutionTest.java b/argi-graph-core/src/test/java/io/github/agentic/ai/graph/CloneStateKeyStrategyPollutionTest.java
index 46f0e8640..9a5f8f856 100644
--- a/argi-graph-core/src/test/java/io/github/agentic/ai/graph/CloneStateKeyStrategyPollutionTest.java
+++ b/argi-graph-core/src/test/java/io/github/agentic/ai/graph/CloneStateKeyStrategyPollutionTest.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2024-2026 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 io.github.agentic.ai.graph;
 
 import io.github.agentic.ai.graph.action.NodeAction;