diff --git a/features/cellular/UNITTESTS/target_h/cmsis_os.h b/features/cellular/UNITTESTS/target_h/cmsis_os.h
index 72bdbffc29..a40ab9e73b 100644
--- a/features/cellular/UNITTESTS/target_h/cmsis_os.h
+++ b/features/cellular/UNITTESTS/target_h/cmsis_os.h
@@ -1,3 +1,20 @@
+/*
+ * Copyright (c) , Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
 #ifndef CMSIS_OS_H_
 #define CMSIS_OS_H_
 
diff --git a/features/cellular/UNITTESTS/target_h/mbed_rtx_conf.h b/features/cellular/UNITTESTS/target_h/mbed_rtx_conf.h
index 7003861797..18d985fa49 100644
--- a/features/cellular/UNITTESTS/target_h/mbed_rtx_conf.h
+++ b/features/cellular/UNITTESTS/target_h/mbed_rtx_conf.h
@@ -1 +1,18 @@
+/*
+ * Copyright (c) , Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
 #define OS_STACK_SIZE 0
diff --git a/features/cellular/UNITTESTS/target_h/rtos/Mutex.h b/features/cellular/UNITTESTS/target_h/rtos/Mutex.h
index 2c60c99eb3..d67b376cca 100644
--- a/features/cellular/UNITTESTS/target_h/rtos/Mutex.h
+++ b/features/cellular/UNITTESTS/target_h/rtos/Mutex.h
@@ -1 +1,18 @@
+/*
+ * Copyright (c) , Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
 typedef void* Mutex;
diff --git a/features/cellular/UNITTESTS/target_h/rtos/Semaphore.h b/features/cellular/UNITTESTS/target_h/rtos/Semaphore.h
index cdc7ab0080..c0ca4c7c99 100644
--- a/features/cellular/UNITTESTS/target_h/rtos/Semaphore.h
+++ b/features/cellular/UNITTESTS/target_h/rtos/Semaphore.h
@@ -1 +1,18 @@
+/*
+ * Copyright (c) , Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
 typedef void* Semaphore;