diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 8a83ceeaf2..da69d6f09c 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 if(FREECAD_USE_EXTERNAL_GTEST)
     find_package(GTest REQUIRED)
     set(Google_Tests_LIBS ${GTEST_LIBRARIES} ${GMOCK_LIBRARIES})
diff --git a/tests/src/App/Application.cpp b/tests/src/App/Application.cpp
index 8ec0873601..8ef65ecb78 100644
--- a/tests/src/App/Application.cpp
+++ b/tests/src/App/Application.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 #define FC_OS_MACOSX 1
 #include "App/ProgramOptionsUtilities.h"
diff --git a/tests/src/App/ApplicationDirectories.cpp b/tests/src/App/ApplicationDirectories.cpp
index b23cc9c4ca..ecd3c3a020 100644
--- a/tests/src/App/ApplicationDirectories.cpp
+++ b/tests/src/App/ApplicationDirectories.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 #include <App/ApplicationDirectories.h>
 
diff --git a/tests/src/App/Branding.cpp b/tests/src/App/Branding.cpp
index 1b0ff52df4..e2e5e87c29 100644
--- a/tests/src/App/Branding.cpp
+++ b/tests/src/App/Branding.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 
 #include "App/Branding.h"
diff --git a/tests/src/App/CMakeLists.txt b/tests/src/App/CMakeLists.txt
index c99750e30c..23691f92fd 100644
--- a/tests/src/App/CMakeLists.txt
+++ b/tests/src/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(App_tests_run
         Application.cpp
         ApplicationDirectories.cpp
diff --git a/tests/src/App/ExpressionParser.cpp b/tests/src/App/ExpressionParser.cpp
index fe27e45002..c46098ed85 100644
--- a/tests/src/App/ExpressionParser.cpp
+++ b/tests/src/App/ExpressionParser.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 
 #include "Base/Quantity.h"
diff --git a/tests/src/App/InitApplication.h b/tests/src/App/InitApplication.h
index 53cc4f5b13..1f363be7ee 100644
--- a/tests/src/App/InitApplication.h
+++ b/tests/src/App/InitApplication.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #ifndef TEST_APPLICATION_H
 #define TEST_APPLICATION_H
 
diff --git a/tests/src/App/License.cpp b/tests/src/App/License.cpp
index 972a225d5c..5429eeca33 100644
--- a/tests/src/App/License.cpp
+++ b/tests/src/App/License.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 
 #include "App/License.h"
diff --git a/tests/src/App/Metadata.cpp b/tests/src/App/Metadata.cpp
index c444b4eb75..581d22525a 100644
--- a/tests/src/App/Metadata.cpp
+++ b/tests/src/App/Metadata.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /**************************************************************************
  *                                                                         *
  *   Copyright (c) 2021-2023 FreeCAD Project Association                   *
diff --git a/tests/src/App/ProjectFile.cpp b/tests/src/App/ProjectFile.cpp
index 5ed8042476..576de9e90a 100644
--- a/tests/src/App/ProjectFile.cpp
+++ b/tests/src/App/ProjectFile.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 
 #include "InitApplication.h"
diff --git a/tests/src/App/Property.cpp b/tests/src/App/Property.cpp
index 0006f4cf12..96e5d7c0d1 100644
--- a/tests/src/App/Property.cpp
+++ b/tests/src/App/Property.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /****************************************************************************
  *   Copyright (c) 2024 Werner Mayer <wmayer[at]users.sourceforge.net>      *
  *   Copyright (c) 2025 Pieter Hijma <info@pieterhijma.net>                 *
diff --git a/tests/src/App/Property.h b/tests/src/App/Property.h
index 0e83bc4348..38ab09c4cc 100644
--- a/tests/src/App/Property.h
+++ b/tests/src/App/Property.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /****************************************************************************
  *   Copyright (c) 2025 Pieter Hijma <info@pieterhijma.net>                 *
  *                                                                          *
diff --git a/tests/src/App/PropertyExpressionEngine.cpp b/tests/src/App/PropertyExpressionEngine.cpp
index 582d80bf3a..ed2accf08a 100644
--- a/tests/src/App/PropertyExpressionEngine.cpp
+++ b/tests/src/App/PropertyExpressionEngine.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 
 #include "Base/Quantity.h"
diff --git a/tests/src/App/VarSet.cpp b/tests/src/App/VarSet.cpp
index 7ba3dc665a..89ed405d20 100644
--- a/tests/src/App/VarSet.cpp
+++ b/tests/src/App/VarSet.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /****************************************************************************
  *   Copyright (c) 2024 Ondsel <development@ondsel.com>                     *
  *                                                                          *
diff --git a/tests/src/CMakeLists.txt b/tests/src/CMakeLists.txt
index 9531af5dc6..7e077183ef 100644
--- a/tests/src/CMakeLists.txt
+++ b/tests/src/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(Base)
 add_subdirectory(App)
 add_subdirectory(Gui)
diff --git a/tests/src/Gui/Assistant.cpp b/tests/src/Gui/Assistant.cpp
index 2b8df4060c..0b637995fd 100644
--- a/tests/src/Gui/Assistant.cpp
+++ b/tests/src/Gui/Assistant.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 
 #include "Gui/Assistant.h"
diff --git a/tests/src/Gui/CMakeLists.txt b/tests/src/Gui/CMakeLists.txt
index 7b18d4662d..aa7ed73357 100644
--- a/tests/src/Gui/CMakeLists.txt
+++ b/tests/src/Gui/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # Standard C++ GTest tests
 add_executable(Gui_tests_run
         Assistant.cpp
diff --git a/tests/src/Gui/Camera.cpp b/tests/src/Gui/Camera.cpp
index 8521efd180..3968e027f8 100644
--- a/tests/src/Gui/Camera.cpp
+++ b/tests/src/Gui/Camera.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 
 #include <array>
diff --git a/tests/src/Gui/InputHintTest.cpp b/tests/src/Gui/InputHintTest.cpp
index fa1f511f9b..7aa543a604 100644
--- a/tests/src/Gui/InputHintTest.cpp
+++ b/tests/src/Gui/InputHintTest.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 
 #include "Gui/InputHint.h"
diff --git a/tests/src/Misc/CMakeLists.txt b/tests/src/Misc/CMakeLists.txt
index 33cf8f1d8d..1e7b085c71 100644
--- a/tests/src/Misc/CMakeLists.txt
+++ b/tests/src/Misc/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(Misc_tests_run
         fmt.cpp
 )
diff --git a/tests/src/Misc/fmt.cpp b/tests/src/Misc/fmt.cpp
index 8113745a74..62bcf67022 100644
--- a/tests/src/Misc/fmt.cpp
+++ b/tests/src/Misc/fmt.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <fmt/format.h>
 #include <fmt/printf.h>
 #include <gtest/gtest.h>
diff --git a/tests/src/Mod/Assembly/App/CMakeLists.txt b/tests/src/Mod/Assembly/App/CMakeLists.txt
index 8b9a91cceb..8f41d9e9fb 100644
--- a/tests/src/Mod/Assembly/App/CMakeLists.txt
+++ b/tests/src/Mod/Assembly/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(Assembly_tests_run
         AssemblyObject.cpp
 )
diff --git a/tests/src/Mod/Assembly/CMakeLists.txt b/tests/src/Mod/Assembly/CMakeLists.txt
index 42fbe630be..1d3bb763b3 100644
--- a/tests/src/Mod/Assembly/CMakeLists.txt
+++ b/tests/src/Mod/Assembly/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(App)
 
 if (NOT FREECAD_USE_EXTERNAL_ONDSELSOLVER)
diff --git a/tests/src/Mod/CMakeLists.txt b/tests/src/Mod/CMakeLists.txt
index 4b1ae053d3..16bded34d3 100644
--- a/tests/src/Mod/CMakeLists.txt
+++ b/tests/src/Mod/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 if(BUILD_ASSEMBLY)
   add_subdirectory(Assembly)
 endif(BUILD_ASSEMBLY)
diff --git a/tests/src/Mod/Material/App/CMakeLists.txt b/tests/src/Mod/Material/App/CMakeLists.txt
index 8e9b748285..d246d292cb 100644
--- a/tests/src/Mod/Material/App/CMakeLists.txt
+++ b/tests/src/Mod/Material/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(Material_tests_run
         TestMaterialCards.cpp
         TestMaterialFilter.cpp
diff --git a/tests/src/Mod/Material/CMakeLists.txt b/tests/src/Mod/Material/CMakeLists.txt
index 4e309e4f55..502697a0e6 100644
--- a/tests/src/Mod/Material/CMakeLists.txt
+++ b/tests/src/Mod/Material/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(App)
 
 target_link_libraries(Material_tests_run
diff --git a/tests/src/Mod/Measure/App/CMakeLists.txt b/tests/src/Mod/Measure/App/CMakeLists.txt
index 523974b8e2..8cae188ec4 100644
--- a/tests/src/Mod/Measure/App/CMakeLists.txt
+++ b/tests/src/Mod/Measure/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(Measure_tests_run
         MeasureDistance.cpp
 )
diff --git a/tests/src/Mod/Measure/App/MeasureDistance.cpp b/tests/src/Mod/Measure/App/MeasureDistance.cpp
index c88a6fd7d0..20168b6554 100644
--- a/tests/src/Mod/Measure/App/MeasureDistance.cpp
+++ b/tests/src/Mod/Measure/App/MeasureDistance.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <src/App/InitApplication.h>
 #include <App/Document.h>
 #include <Mod/Measure/App/MeasureDistance.h>
diff --git a/tests/src/Mod/Measure/CMakeLists.txt b/tests/src/Mod/Measure/CMakeLists.txt
index 12bce0f024..27bc3a00df 100644
--- a/tests/src/Mod/Measure/CMakeLists.txt
+++ b/tests/src/Mod/Measure/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(App)
 
 target_link_libraries(Measure_tests_run
diff --git a/tests/src/Mod/Mesh/App/CMakeLists.txt b/tests/src/Mod/Mesh/App/CMakeLists.txt
index b4f6a04ca6..1980bb6097 100644
--- a/tests/src/Mod/Mesh/App/CMakeLists.txt
+++ b/tests/src/Mod/Mesh/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(Mesh_tests_run
         Core/KDTree.cpp
         Exporter.cpp
diff --git a/tests/src/Mod/Mesh/App/Core/KDTree.cpp b/tests/src/Mod/Mesh/App/Core/KDTree.cpp
index 5ffe3ad088..69651f6cc5 100644
--- a/tests/src/Mod/Mesh/App/Core/KDTree.cpp
+++ b/tests/src/Mod/Mesh/App/Core/KDTree.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 #include <Mod/Mesh/App/Core/KDTree.h>
 
diff --git a/tests/src/Mod/Mesh/App/Exporter.cpp b/tests/src/Mod/Mesh/App/Exporter.cpp
index cb63eff7b1..4dc95e9563 100644
--- a/tests/src/Mod/Mesh/App/Exporter.cpp
+++ b/tests/src/Mod/Mesh/App/Exporter.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 #include <Base/FileInfo.h>
 #include <Base/Interpreter.h>
diff --git a/tests/src/Mod/Mesh/App/Importer.cpp b/tests/src/Mod/Mesh/App/Importer.cpp
index 31f4e5c793..b0d1b8a0cf 100644
--- a/tests/src/Mod/Mesh/App/Importer.cpp
+++ b/tests/src/Mod/Mesh/App/Importer.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 #include <Base/FileInfo.h>
 #include <Mod/Mesh/App/Core/IO/Reader3MF.h>
diff --git a/tests/src/Mod/Mesh/App/Mesh.cpp b/tests/src/Mod/Mesh/App/Mesh.cpp
index e7b0bd315d..93f26e0a86 100644
--- a/tests/src/Mod/Mesh/App/Mesh.cpp
+++ b/tests/src/Mod/Mesh/App/Mesh.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 #include <Mod/Mesh/App/Mesh.h>
 #include <Mod/Mesh/App/Core/Grid.h>
diff --git a/tests/src/Mod/Mesh/App/MeshFeature.cpp b/tests/src/Mod/Mesh/App/MeshFeature.cpp
index 09305b8802..88ca3f1d64 100644
--- a/tests/src/Mod/Mesh/App/MeshFeature.cpp
+++ b/tests/src/Mod/Mesh/App/MeshFeature.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include "gtest/gtest.h"
 #include <src/App/InitApplication.h>
 #include <Mod/Mesh/App/MeshFeature.h>
diff --git a/tests/src/Mod/Mesh/CMakeLists.txt b/tests/src/Mod/Mesh/CMakeLists.txt
index a1b44216ee..679301d789 100644
--- a/tests/src/Mod/Mesh/CMakeLists.txt
+++ b/tests/src/Mod/Mesh/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(App)
 
 target_link_libraries(Mesh_tests_run
diff --git a/tests/src/Mod/MeshPart/App/CMakeLists.txt b/tests/src/Mod/MeshPart/App/CMakeLists.txt
index 96f4eadc4f..f11ad63738 100644
--- a/tests/src/Mod/MeshPart/App/CMakeLists.txt
+++ b/tests/src/Mod/MeshPart/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(MeshPart_tests_run
         MeshPart.cpp
 )
diff --git a/tests/src/Mod/MeshPart/App/MeshPart.cpp b/tests/src/Mod/MeshPart/App/MeshPart.cpp
index 6614c5d9b6..c842ce07c4 100644
--- a/tests/src/Mod/MeshPart/App/MeshPart.cpp
+++ b/tests/src/Mod/MeshPart/App/MeshPart.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 #include <BRepPrimAPI_MakeBox.hxx>
 #include <TopoDS_Solid.hxx>
diff --git a/tests/src/Mod/MeshPart/CMakeLists.txt b/tests/src/Mod/MeshPart/CMakeLists.txt
index 019097ca2c..70008fbfd0 100644
--- a/tests/src/Mod/MeshPart/CMakeLists.txt
+++ b/tests/src/Mod/MeshPart/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(App)
 
 target_link_libraries(MeshPart_tests_run
diff --git a/tests/src/Mod/Part/App/CMakeLists.txt b/tests/src/Mod/Part/App/CMakeLists.txt
index 958db78e7d..0b51838a96 100644
--- a/tests/src/Mod/Part/App/CMakeLists.txt
+++ b/tests/src/Mod/Part/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(Part_tests_run
         Attacher.cpp
         AttachExtension.cpp
diff --git a/tests/src/Mod/Part/CMakeLists.txt b/tests/src/Mod/Part/CMakeLists.txt
index e5ca397145..5177651c6e 100644
--- a/tests/src/Mod/Part/CMakeLists.txt
+++ b/tests/src/Mod/Part/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(App)
 
 target_link_libraries(Part_tests_run
diff --git a/tests/src/Mod/PartDesign/App/CMakeLists.txt b/tests/src/Mod/PartDesign/App/CMakeLists.txt
index 9957f510f0..e81b4382d0 100644
--- a/tests/src/Mod/PartDesign/App/CMakeLists.txt
+++ b/tests/src/Mod/PartDesign/App/CMakeLists.txt
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 add_executable(PartDesign_tests_run
         BackwardCompatibility.cpp
diff --git a/tests/src/Mod/PartDesign/CMakeLists.txt b/tests/src/Mod/PartDesign/CMakeLists.txt
index 328b79e8c7..7ae5654c23 100644
--- a/tests/src/Mod/PartDesign/CMakeLists.txt
+++ b/tests/src/Mod/PartDesign/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(App)
 
 target_link_libraries(PartDesign_tests_run
diff --git a/tests/src/Mod/Points/App/CMakeLists.txt b/tests/src/Mod/Points/App/CMakeLists.txt
index 29a688a6bb..36de709ea1 100644
--- a/tests/src/Mod/Points/App/CMakeLists.txt
+++ b/tests/src/Mod/Points/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(Points_tests_run
         Points.cpp
         PointsFeature.cpp
diff --git a/tests/src/Mod/Points/App/Points.cpp b/tests/src/Mod/Points/App/Points.cpp
index cf82496747..a3948c0c54 100644
--- a/tests/src/Mod/Points/App/Points.cpp
+++ b/tests/src/Mod/Points/App/Points.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 #include <Base/FileInfo.h>
 #include <Mod/Points/App/Points.h>
diff --git a/tests/src/Mod/Points/App/PointsFeature.cpp b/tests/src/Mod/Points/App/PointsFeature.cpp
index bf03f293c4..da411ebb98 100644
--- a/tests/src/Mod/Points/App/PointsFeature.cpp
+++ b/tests/src/Mod/Points/App/PointsFeature.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include "gtest/gtest.h"
 #include <src/App/InitApplication.h>
 #include <Mod/Points/App/PointsFeature.h>
diff --git a/tests/src/Mod/Points/CMakeLists.txt b/tests/src/Mod/Points/CMakeLists.txt
index a6cf99b6ed..5d90e94ed0 100644
--- a/tests/src/Mod/Points/CMakeLists.txt
+++ b/tests/src/Mod/Points/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(App)
 
 target_link_libraries(Points_tests_run
diff --git a/tests/src/Mod/Sketcher/App/CMakeLists.txt b/tests/src/Mod/Sketcher/App/CMakeLists.txt
index 470ff7adfb..ea7679b5b1 100644
--- a/tests/src/Mod/Sketcher/App/CMakeLists.txt
+++ b/tests/src/Mod/Sketcher/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(Sketcher_tests_run
         Constraint.cpp
         SketcherTestHelpers.cpp
diff --git a/tests/src/Mod/Sketcher/App/Constraint.cpp b/tests/src/Mod/Sketcher/App/Constraint.cpp
index 265c39da69..73599c8f74 100644
--- a/tests/src/Mod/Sketcher/App/Constraint.cpp
+++ b/tests/src/Mod/Sketcher/App/Constraint.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 
 #include <FCConfig.h>
 
diff --git a/tests/src/Mod/Sketcher/App/planegcs/CMakeLists.txt b/tests/src/Mod/Sketcher/App/planegcs/CMakeLists.txt
index 6fe9208a12..b3842c9793 100644
--- a/tests/src/Mod/Sketcher/App/planegcs/CMakeLists.txt
+++ b/tests/src/Mod/Sketcher/App/planegcs/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 target_sources(Sketcher_tests_run PRIVATE
         GCS.cpp
 )
diff --git a/tests/src/Mod/Sketcher/CMakeLists.txt b/tests/src/Mod/Sketcher/CMakeLists.txt
index e034c91afb..2320f82afa 100644
--- a/tests/src/Mod/Sketcher/CMakeLists.txt
+++ b/tests/src/Mod/Sketcher/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(App)
 
 target_link_libraries(Sketcher_tests_run
diff --git a/tests/src/Mod/Spreadsheet/App/CMakeLists.txt b/tests/src/Mod/Spreadsheet/App/CMakeLists.txt
index c3f8330a34..01bff9da5e 100644
--- a/tests/src/Mod/Spreadsheet/App/CMakeLists.txt
+++ b/tests/src/Mod/Spreadsheet/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(Spreadsheet_tests_run
             PropertySheet.cpp
             RenameProperty.cpp
diff --git a/tests/src/Mod/Spreadsheet/App/RenameProperty.cpp b/tests/src/Mod/Spreadsheet/App/RenameProperty.cpp
index ff182addb4..6ae1793101 100644
--- a/tests/src/Mod/Spreadsheet/App/RenameProperty.cpp
+++ b/tests/src/Mod/Spreadsheet/App/RenameProperty.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /****************************************************************************
  *   Copyright (c) 2025 Pieter Hijma <info@pieterhijma.net>                 *
  *                                                                          *
diff --git a/tests/src/Mod/Spreadsheet/CMakeLists.txt b/tests/src/Mod/Spreadsheet/CMakeLists.txt
index 2bfcf5a276..441e80d542 100644
--- a/tests/src/Mod/Spreadsheet/CMakeLists.txt
+++ b/tests/src/Mod/Spreadsheet/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(App)
 
 target_link_libraries(Spreadsheet_tests_run
diff --git a/tests/src/Mod/Start/App/CMakeLists.txt b/tests/src/Mod/Start/App/CMakeLists.txt
index 1bc72689e7..54d721374a 100644
--- a/tests/src/Mod/Start/App/CMakeLists.txt
+++ b/tests/src/Mod/Start/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(Start_tests_run
         FileUtilities.cpp
         ThumbnailSource.cpp
diff --git a/tests/src/Mod/Start/CMakeLists.txt b/tests/src/Mod/Start/CMakeLists.txt
index 24fe58429a..0cbcb07bdb 100644
--- a/tests/src/Mod/Start/CMakeLists.txt
+++ b/tests/src/Mod/Start/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_subdirectory(App)
 
 target_include_directories(Start_tests_run PUBLIC
diff --git a/tests/src/zipios++/CMakeLists.txt b/tests/src/zipios++/CMakeLists.txt
index cbf5ac19c5..f9cf31f0c3 100644
--- a/tests/src/zipios++/CMakeLists.txt
+++ b/tests/src/zipios++/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 add_executable(Zipios_tests_run
         collectioncollection.cpp
         zipfile.cpp
diff --git a/tests/src/zipios++/collectioncollection.cpp b/tests/src/zipios++/collectioncollection.cpp
index a2168cea7f..1efe494bfa 100644
--- a/tests/src/zipios++/collectioncollection.cpp
+++ b/tests/src/zipios++/collectioncollection.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 #include <memory>
 #include <zipios++/collcoll.h>
diff --git a/tests/src/zipios++/zipfile.cpp b/tests/src/zipios++/zipfile.cpp
index 62095337b3..f22e2d8fbb 100644
--- a/tests/src/zipios++/zipfile.cpp
+++ b/tests/src/zipios++/zipfile.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <gtest/gtest.h>
 #include <cstdio>
 #include <memory>