diff --git a/parser/src/diagnostics.rs b/parser/src/diagnostics.rs
index 51fe014..a7a9709 100644
--- a/parser/src/diagnostics.rs
+++ b/parser/src/diagnostics.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 use ariadne::{Color, Label, Report, ReportKind, Source};
 use lexer::{LexingError, Span};
 use thiserror::Error;
diff --git a/parser/src/idempotency.rs b/parser/src/idempotency.rs
index a7f1ed2..81b9ff1 100644
--- a/parser/src/idempotency.rs
+++ b/parser/src/idempotency.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 use std::fmt::{Debug, Display, Formatter, Result, Write};
 
 use crate::{
diff --git a/parser/src/lib.rs b/parser/src/lib.rs
index d6cde5c..7ae7032 100644
--- a/parser/src/lib.rs
+++ b/parser/src/lib.rs
@@ -2,6 +2,7 @@
 //
 // For the full copyright and license information, please view the LICENSE
 // files that was distributed with this source code.
+
 #![forbid(unsafe_code)]
 
 mod ast;
diff --git a/parser/src/pratt.rs b/parser/src/pratt.rs
index 50661ec..43e296c 100644
--- a/parser/src/pratt.rs
+++ b/parser/src/pratt.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 use lexer::Token;
 
 use crate::{
diff --git a/parser/src/tests.rs b/parser/src/tests.rs
index 9b292a2..6ac51fd 100644
--- a/parser/src/tests.rs
+++ b/parser/src/tests.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 use std::fmt::Debug;
 
 use bumpalo::Bump;
diff --git a/tests/awk.rs b/tests/awk.rs
index e3fb16c..e216261 100644
--- a/tests/awk.rs
+++ b/tests/awk.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 use std::env;
 
 use uutests::util::TestScenario;
diff --git a/tests/by-util/test_awk.rs b/tests/by-util/test_awk.rs
index f451bb9..e10b92e 100644
--- a/tests/by-util/test_awk.rs
+++ b/tests/by-util/test_awk.rs
@@ -1,3 +1,8 @@
+// This file is part of the uutils awk package.
+//
+// For the full copyright and license information, please view the LICENSE
+// files that was distributed with this source code.
+
 use crate::ucmd;
 
 #[test]