diff --git a/tests/plugins/Qukeys/basic/sketch.h b/tests/plugins/Qukeys/basic/sketch.h
index d7b0e42c..9293eb83 100644
--- a/tests/plugins/Qukeys/basic/sketch.h
+++ b/tests/plugins/Qukeys/basic/sketch.h
@@ -1,5 +1,21 @@
 // -*- mode: c++ -*-
 
+/* Kaleidoscope - Firmware for computer input devices
+ * Copyright (C) 2020  Keyboard.io, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #pragma once
 
 #include <cstdint>
diff --git a/tests/plugins/Qukeys/basic/sketch.ino b/tests/plugins/Qukeys/basic/sketch.ino
index 3bdc6c92..5ab6d23d 100644
--- a/tests/plugins/Qukeys/basic/sketch.ino
+++ b/tests/plugins/Qukeys/basic/sketch.ino
@@ -1,4 +1,18 @@
-// -*- mode: c++ -*-
+/* -*- mode: c++ -*-
+ * Copyright (C) 2020  Keyboard.io, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #include <Kaleidoscope.h>
 #include <Kaleidoscope-Qukeys.h>