diff --git a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/credentials/CertPemCredentialsTest.java b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/credentials/CertPemCredentialsTest.java
index 132b60554b..904f470001 100644
--- a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/credentials/CertPemCredentialsTest.java
+++ b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/credentials/CertPemCredentialsTest.java
@@ -1,3 +1,18 @@
+/**
+ * Copyright © 2016-2023 The Thingsboard 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
+ *
+ *     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 org.thingsboard.rule.engine.credentials;
 
 import org.apache.commons.io.FileUtils;