diff --git a/tests/formatter/test_formatter.qml b/tests/formatter/test_formatter.qml
index e536be3..afa563b 100644
--- a/tests/formatter/test_formatter.qml
+++ b/tests/formatter/test_formatter.qml
@@ -1,64 +1,83 @@
+/*
+    Copyright (C) 2020 Arjen Hiemstra <ahiemstra@heimr.nl>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
 import QtQuick 2.12
 import QtQuick.Controls 2.12
 import QtQuick.Layouts 1.12
 
 import org.kde.ksysguard.formatter 1.0 as Formatter
 
 Pane {
     width: 400
     height: 400
 
     ColumnLayout {
         anchors.fill: parent
 
         TextField {
             id: input
             Layout.fillWidth: true
         }
 
         ComboBox {
             id: unitCombo
 
             Layout.fillWidth: true
 
             textRole: "key"
 
             model: [
                 { key: "Bytes", value: Formatter.Units.UnitByte },
                 { key: "Kilobytes", value: Formatter.Units.UnitKiloByte },
                 { key: "Megabytes", value: Formatter.Units.UnitMegaByte },
                 { key: "Bytes per Second", value: Formatter.Units.UnitByteRate },
                 { key: "Hertz", value: Formatter.Units.UnitHertz },
                 { key: "Second", value: Formatter.Units.UnitSecond },
                 { key: "Celcius", value: Formatter.Units.UnitCelsius },
                 { key: "Volt", value: Formatter.Units.UnitVolt },
                 { key: "Watt", value: Formatter.Units.UnitWatt }
             ]
         }
 
         ComboBox {
             id: prefixCombo
 
             Layout.fillWidth: true
 
             textRole: "key"
 
             model: [
                 { key: "None", value: Formatter.Units.MetricPrefixUnity },
                 { key: "Auto-adjust", value: Formatter.Units.MetricPrefixAutoAdjust },
                 { key: "Kilo", value: Formatter.Units.MetricPrefixKilo },
                 { key: "Mega", value: Formatter.Units.MetricPrefixMega },
                 { key: "Giga", value: Formatter.Units.MetricPrefixGiga },
                 { key: "Tera", value: Formatter.Units.MetricPrefixTera },
                 { key: "Peta", value: Formatter.Units.MetricPrefixPeta }
             ]
         }
 
         Label {
             text: Formatter.Formatter.formatValueShowNull(input.text,
                                                           unitCombo.model[unitCombo.currentIndex].value,
                                                           prefixCombo.model[prefixCombo.currentIndex].value
                                                          )
         }
     }
 }