diff --git a/pkg/util/testutil/racedetection/off.go b/pkg/util/testutil/racedetection/off.go
index 73620f67f3f..d57125bfd03 100644
--- a/pkg/util/testutil/racedetection/off.go
+++ b/pkg/util/testutil/racedetection/off.go
@@ -1,8 +1,10 @@
+// Copyright 2020 The Swarm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 //go:build !race
 // +build !race
 
 package racedetection
 
 const On = false
-
-
diff --git a/pkg/util/testutil/racedetection/on.go b/pkg/util/testutil/racedetection/on.go
index 4a304ad0adf..92438ecfdc3 100644
--- a/pkg/util/testutil/racedetection/on.go
+++ b/pkg/util/testutil/racedetection/on.go
@@ -1,3 +1,7 @@
+// Copyright 2020 The Swarm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 //go:build race
 // +build race
 
diff --git a/pkg/util/testutil/racedetection/race.go b/pkg/util/testutil/racedetection/race.go
index 14baac2349f..411295e87f6 100644
--- a/pkg/util/testutil/racedetection/race.go
+++ b/pkg/util/testutil/racedetection/race.go
@@ -1,3 +1,7 @@
+// Copyright 2020 The Swarm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package racedetection
 
 func IsOn() bool {