diff --git a/test/cable_unittest.cpp b/test/cable_unittest.cpp
index 2eeb486..06b4706 100644
--- a/test/cable_unittest.cpp
+++ b/test/cable_unittest.cpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #include "cable.hpp"
 #include "commands.hpp"
 #include "handler_mock.hpp"
diff --git a/test/common.cpp b/test/common.cpp
index f8f635f..ced6eef 100644
--- a/test/common.cpp
+++ b/test/common.cpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #include <cstdint>
 #include <string>
 
diff --git a/test/cpld_unittest.cpp b/test/cpld_unittest.cpp
index 2054df7..f9ab539 100644
--- a/test/cpld_unittest.cpp
+++ b/test/cpld_unittest.cpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #include "commands.hpp"
 #include "cpld.hpp"
 #include "handler_mock.hpp"
diff --git a/test/entity_unittest.cpp b/test/entity_unittest.cpp
index 7091cb1..a939a8a 100644
--- a/test/entity_unittest.cpp
+++ b/test/entity_unittest.cpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #include "commands.hpp"
 #include "entity_name.hpp"
 #include "handler_mock.hpp"
diff --git a/test/eth_unittest.cpp b/test/eth_unittest.cpp
index 9807c91..2b5192a 100644
--- a/test/eth_unittest.cpp
+++ b/test/eth_unittest.cpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #include "commands.hpp"
 #include "eth.hpp"
 #include "handler_mock.hpp"
diff --git a/test/flash_unittest.cpp b/test/flash_unittest.cpp
index 36f5d4a..f4337f7 100644
--- a/test/flash_unittest.cpp
+++ b/test/flash_unittest.cpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #include "commands.hpp"
 #include "flash_size.hpp"
 #include "handler_mock.hpp"
diff --git a/test/handler_mock.hpp b/test/handler_mock.hpp
index 841d986..cd85418 100644
--- a/test/handler_mock.hpp
+++ b/test/handler_mock.hpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #pragma once
 
 #include "handler.hpp"
diff --git a/test/handler_unittest.cpp b/test/handler_unittest.cpp
index b93e877..1dda3ce 100644
--- a/test/handler_unittest.cpp
+++ b/test/handler_unittest.cpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #include "errors.hpp"
 #include "handler.hpp"
 #include "handler_impl.hpp"
diff --git a/test/machine_unittest.cpp b/test/machine_unittest.cpp
index 0e50a69..924c25a 100644
--- a/test/machine_unittest.cpp
+++ b/test/machine_unittest.cpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #include "commands.hpp"
 #include "errors.hpp"
 #include "handler_mock.hpp"
diff --git a/test/pcie_unittest.cpp b/test/pcie_unittest.cpp
index 5f7130f..1eb8fd8 100644
--- a/test/pcie_unittest.cpp
+++ b/test/pcie_unittest.cpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #include "commands.hpp"
 #include "handler_mock.hpp"
 #include "pcie_i2c.hpp"
diff --git a/test/poweroff_unittest.cpp b/test/poweroff_unittest.cpp
index ce9501b..4bbd40a 100644
--- a/test/poweroff_unittest.cpp
+++ b/test/poweroff_unittest.cpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #include "commands.hpp"
 #include "handler_mock.hpp"
 #include "host_power_off.hpp"
diff --git a/test/psu_unittest.cpp b/test/psu_unittest.cpp
index adf3278..257baad 100644
--- a/test/psu_unittest.cpp
+++ b/test/psu_unittest.cpp
@@ -1,3 +1,17 @@
+// Copyright 2021 Google LLC
+//
+// 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.
+
 #include "commands.hpp"
 #include "handler_mock.hpp"
 #include "psu.hpp"