diff --git a/src/tests/sample_output.rs b/src/tests/sample_output.rs
index d0e6b25..b554a3a 100644
--- a/src/tests/sample_output.rs
+++ b/src/tests/sample_output.rs
@@ -1,3 +1,18 @@
+// This file is part of Deja-vu.
+//
+// Deja-vu 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, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Deja-vu 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 Deja-vu. If not, see <https://www.gnu.org/licenses/>.
+//
 #[allow(dead_code)]
 pub static DETAIL_DISK_GPT: &str = "Disk 2 is now the selected disk.