diff --git a/ncsid/test/iface_test.cpp b/ncsid/test/iface_test.cpp
index 70eef05..267194c 100644
--- a/ncsid/test/iface_test.cpp
+++ b/ncsid/test/iface_test.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 "net_iface_mock.h"
 
 #include <gtest/gtest.h>
diff --git a/ncsid/test/meson.build b/ncsid/test/meson.build
index 169b33f..27c2f8b 100644
--- a/ncsid/test/meson.build
+++ b/ncsid/test/meson.build
@@ -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.
+
 gtest = dependency('gtest', main: true, disabler: true, required: false)
 gmock = dependency('gmock', disabler: true, required: false)
 if not gtest.found() or not gmock.found()
diff --git a/ncsid/test/ncsi_test.cpp b/ncsid/test/ncsi_test.cpp
index 9808da6..39b8378 100644
--- a/ncsid/test/ncsi_test.cpp
+++ b/ncsid/test/ncsi_test.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 "net_iface_mock.h"
 #include "nic_mock.h"
 #include "platforms/nemora/portable/default_addresses.h"
diff --git a/ncsid/test/net_iface_mock.cpp b/ncsid/test/net_iface_mock.cpp
index 4c72ef2..4b071ed 100644
--- a/ncsid/test/net_iface_mock.cpp
+++ b/ncsid/test/net_iface_mock.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 "net_iface_mock.h"
 
 namespace mock
diff --git a/ncsid/test/net_iface_mock.h b/ncsid/test/net_iface_mock.h
index 5fcbcc9..bcf9209 100644
--- a/ncsid/test/net_iface_mock.h
+++ b/ncsid/test/net_iface_mock.h
@@ -1,3 +1,19 @@
+/*
+ * 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 <net_iface.h>
diff --git a/ncsid/test/nic_mock.cpp b/ncsid/test/nic_mock.cpp
index 8996125..01b154b 100644
--- a/ncsid/test/nic_mock.cpp
+++ b/ncsid/test/nic_mock.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 "nic_mock.h"
 
 #include "platforms/nemora/portable/ncsi.h"
diff --git a/ncsid/test/nic_mock.h b/ncsid/test/nic_mock.h
index 97a6737..13e5959 100644
--- a/ncsid/test/nic_mock.h
+++ b/ncsid/test/nic_mock.h
@@ -1,3 +1,19 @@
+/*
+ * 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 "platforms/nemora/portable/ncsi.h"
diff --git a/ncsid/test/normalize_ip_test.sh b/ncsid/test/normalize_ip_test.sh
index cb520ef..fbd703a 100755
--- a/ncsid/test/normalize_ip_test.sh
+++ b/ncsid/test/normalize_ip_test.sh
@@ -1,4 +1,18 @@
 #!/bin/bash
+# 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.
+
 TEST_DIR="$(dirname "${BASH_SOURCE[0]}")"
 source "$TEST_DIR"/test_lib.sh
 
diff --git a/ncsid/test/normalize_mac_test.sh b/ncsid/test/normalize_mac_test.sh
index 4c94570..734d4a5 100755
--- a/ncsid/test/normalize_mac_test.sh
+++ b/ncsid/test/normalize_mac_test.sh
@@ -1,4 +1,18 @@
 #!/bin/bash
+# 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.
+
 TEST_DIR="$(dirname "${BASH_SOURCE[0]}")"
 source "$TEST_DIR"/test_lib.sh
 
diff --git a/ncsid/test/sock_test.cpp b/ncsid/test/sock_test.cpp
index 2ff2638..6e034de 100644
--- a/ncsid/test/sock_test.cpp
+++ b/ncsid/test/sock_test.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 "ncsi_sockio.h"
 #include "net_iface_mock.h"
 
diff --git a/ncsid/test/test_lib.sh b/ncsid/test/test_lib.sh
index 9e6c882..4159a53 100644
--- a/ncsid/test/test_lib.sh
+++ b/ncsid/test/test_lib.sh
@@ -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.
+
 # Compares two strings and prints out an error message if they are not equal
 StrEq() {
   if [ "$1" != "$2" ]; then