diff --git a/dumux/common/parameters.cc b/dumux/common/parameters.cc
index 49049bc6114d7b6db0de98b98050774c0b29e41f..dadeb3cec0d286e37d52f373595767d90efc29ff 100644
--- a/dumux/common/parameters.cc
+++ b/dumux/common/parameters.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/examples/1protationsymmetry/main.cc b/examples/1protationsymmetry/main.cc
index 7e24bebd63e8aba4bd7eebe2baee614bea694e34..3b70b130d9180e6a2407f5a2e8a86aee26adc2ad 100644
--- a/examples/1protationsymmetry/main.cc
+++ b/examples/1protationsymmetry/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/examples/1ptracer/main.cc b/examples/1ptracer/main.cc
index 94cf78169e99afde1b4164286c091e15e7784268..3abe79103d506dc628efa7b5f0eaf43964f44c3c 100644
--- a/examples/1ptracer/main.cc
+++ b/examples/1ptracer/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/examples/2pinfiltration/main.cc b/examples/2pinfiltration/main.cc
index d8c06a1ebf036cb741a61b2259707b12982e34ba..fa4ebebd02bd72c449673c14220f32f4078550b4 100644
--- a/examples/2pinfiltration/main.cc
+++ b/examples/2pinfiltration/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/examples/biomineralization/main.cc b/examples/biomineralization/main.cc
index 98862b9c0a00088e33f07a86c8d7a5fb7b517a10..f609c82cb94ad94ab4eb2392cd2b2f63e2451866 100644
--- a/examples/biomineralization/main.cc
+++ b/examples/biomineralization/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/examples/cahn_hilliard/main.cc b/examples/cahn_hilliard/main.cc
index b91a6d9acbcb8e692f655330baead3f2f60f540e..cdcbaa11fe0e56117d340619bad4ab5c4007221f 100644
--- a/examples/cahn_hilliard/main.cc
+++ b/examples/cahn_hilliard/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/examples/diffusion/main.cc b/examples/diffusion/main.cc
index a3585e7eda6afad123933362147c9aeecd0bbbda..b32502e6e2f29e066fefa1e8a2d874fee7e22167 100644
--- a/examples/diffusion/main.cc
+++ b/examples/diffusion/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/examples/embedded_network_1d3d/main.cc b/examples/embedded_network_1d3d/main.cc
index efd32b4f13c1422e923d0d3bddec29e86de39e09..c94102f2fffdebdc795e8f27b15e3c54e9737566 100644
--- a/examples/embedded_network_1d3d/main.cc
+++ b/examples/embedded_network_1d3d/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/examples/freeflowchannel/main.cc b/examples/freeflowchannel/main.cc
index f96f530ca5518021989e6651fed0d512d69b708f..ef39b0188d592a8d2487b11e4df067de102f04e4 100644
--- a/examples/freeflowchannel/main.cc
+++ b/examples/freeflowchannel/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/examples/liddrivencavity/main.cc b/examples/liddrivencavity/main.cc
index ba809863f8248945d205ea03ae1fbf187a990d03..de6bc25af52e1fd63d5dc9b2075aef12c240a381 100644
--- a/examples/liddrivencavity/main.cc
+++ b/examples/liddrivencavity/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/examples/porenetwork_upscaling/main.cc b/examples/porenetwork_upscaling/main.cc
index 9b9e0151a5eb829a3f0fb901ae35586c38875069..6b151bc46bdb7673e31d52c6aac4a810e61c2bce 100644
--- a/examples/porenetwork_upscaling/main.cc
+++ b/examples/porenetwork_upscaling/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/examples/shallowwaterfriction/main.cc b/examples/shallowwaterfriction/main.cc
index e80c599ce2a080d7e6c941e663371a2b04afc419..b8bee9f095db1e1f2e35db0f113be1ff5d26afaf 100644
--- a/examples/shallowwaterfriction/main.cc
+++ b/examples/shallowwaterfriction/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/python/dumux/common/_common.cc b/python/dumux/common/_common.cc
index 921a20b442b469f5565548ab0c1b69c63f4f0ae6..2ae4d0082a3cc01154fa4995ab8b18a1b920acf7 100644
--- a/python/dumux/common/_common.cc
+++ b/python/dumux/common/_common.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/common/functions/test_function_l2norm.cc b/test/common/functions/test_function_l2norm.cc
index 676ce78f58bfa420ced4f191e555499fbf14eda1..2de4dc90ed24914d67ac6c652833a5f0d61e8158 100644
--- a/test/common/functions/test_function_l2norm.cc
+++ b/test/common/functions/test_function_l2norm.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <dune/common/fvector.hh>
diff --git a/test/common/integrate/test_integratescalar.cc b/test/common/integrate/test_integratescalar.cc
index 21be225b9487d262d4f4a70efe21c729fa73a0cd..91be095e6f4867de4a1d1cab416035ad311d79be 100644
--- a/test/common/integrate/test_integratescalar.cc
+++ b/test/common/integrate/test_integratescalar.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/common/math/test_math.cc b/test/common/math/test_math.cc
index 8d93b35fa6ccc88530f0e7a7b5355f0a26c0d762..2a8d9d1c51746c3cfa5839ef32f34eb85453480c 100644
--- a/test/common/math/test_math.cc
+++ b/test/common/math/test_math.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/common/metadata/test_metadata.cc b/test/common/metadata/test_metadata.cc
index 0382a445606f4e670763cf379979a0fd98e4746a..34d512e0c00c5c7832260733306f02a720f82d7a 100644
--- a/test/common/metadata/test_metadata.cc
+++ b/test/common/metadata/test_metadata.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/common/parameters/test_loggingparametertree.cc b/test/common/parameters/test_loggingparametertree.cc
index 62532a407ee9aed0f97cc002bab748f426598a92..23a6fd19223196ca099f39dc00641558d6da6292 100644
--- a/test/common/parameters/test_loggingparametertree.cc
+++ b/test/common/parameters/test_loggingparametertree.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 #include <iostream>
 
diff --git a/test/common/propertysystem/test_propertysystem.cc b/test/common/propertysystem/test_propertysystem.cc
index fbc8d185258294487fc379a4ed8d476fd5c3f708..3a7a5474efb6ba3729e5c172bdf65632e78ce03d 100644
--- a/test/common/propertysystem/test_propertysystem.cc
+++ b/test/common/propertysystem/test_propertysystem.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/common/propertysystem/test_propertysystem_aliases.cc b/test/common/propertysystem/test_propertysystem_aliases.cc
index c02c1f852301e01613ac7887a038ba1220275b2f..dd9a031ecbc8c8dc8abcf79a901f3995a52eb7ba 100644
--- a/test/common/propertysystem/test_propertysystem_aliases.cc
+++ b/test/common/propertysystem/test_propertysystem_aliases.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/common/propertysystem/test_propertysystem_example.cc b/test/common/propertysystem/test_propertysystem_example.cc
index 395aaa42219c7ba0b3a8a6131996f9ce78fe19b5..41664717003f600e347a734bfd5918118dc7e575 100644
--- a/test/common/propertysystem/test_propertysystem_example.cc
+++ b/test/common/propertysystem/test_propertysystem_example.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/common/spline/test_cubicspline.cc b/test/common/spline/test_cubicspline.cc
index cb5127e97686460e968b5aa3e179c2c72b7e7155..68a484bd0df068ec285018efc47b728d5db5f81a 100644
--- a/test/common/spline/test_cubicspline.cc
+++ b/test/common/spline/test_cubicspline.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/common/spline/test_monotonecubicspline.cc b/test/common/spline/test_monotonecubicspline.cc
index 3eaae6617fbc8a20342b6cad1eddef39393e6491..8393a9e9bae6a354ded57fc0cd0169992d37ae13 100644
--- a/test/common/spline/test_monotonecubicspline.cc
+++ b/test/common/spline/test_monotonecubicspline.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/common/spline/test_spline.cc b/test/common/spline/test_spline.cc
index b55adf99560806d8bfb835bf06828221d838da7e..c5689ec28ed17dd0dacf10f41b94d8f929e5a743 100644
--- a/test/common/spline/test_spline.cc
+++ b/test/common/spline/test_spline.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/common/stringutilities/test_stringutilities.cc b/test/common/stringutilities/test_stringutilities.cc
index 7958cf1bc72bb560356ab79876539df450e664f8..56b9df1222b00fe2e8fa7f283318ef846a5e26b4 100644
--- a/test/common/stringutilities/test_stringutilities.cc
+++ b/test/common/stringutilities/test_stringutilities.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/common/test_enumerate.cc b/test/common/test_enumerate.cc
index c8c5790afc76a6bb5c8900d31267800cc527786e..c84679244d7ab2751462b9d453568de24ffbf2dc 100644
--- a/test/common/test_enumerate.cc
+++ b/test/common/test_enumerate.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <vector>
diff --git a/test/common/test_partial.cc b/test/common/test_partial.cc
index ca33e3a6da6f51823514214533602bb136298771..361784e44dc2b100a6d3e88bbdfd472dd97cfa10 100644
--- a/test/common/test_partial.cc
+++ b/test/common/test_partial.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/common/test_tag.cc b/test/common/test_tag.cc
index 09f8b73a57dd6481a87d1a886e85b0ad898c1986..7e4d1d1c4c469b2c902ca05d3aa8e40a3a558577 100644
--- a/test/common/test_tag.cc
+++ b/test/common/test_tag.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 #include <iostream>
 
diff --git a/test/common/timeloop/test_timeloop.cc b/test/common/timeloop/test_timeloop.cc
index 37e9d71828c3db1512617b1ed69b00ebf45ccbbc..177e6a7d0527d7c6f190853c7b0265fa993bad04 100644
--- a/test/common/timeloop/test_timeloop.cc
+++ b/test/common/timeloop/test_timeloop.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 // time loop test
 #include <config.h>
 
diff --git a/test/common/typetraits/test_isvalid.cc b/test/common/typetraits/test_isvalid.cc
index a593eeed107bd22c7990990421521724f6326795..ca79282ba4aca5a6373f495284494bf5d6a461cd 100644
--- a/test/common/typetraits/test_isvalid.cc
+++ b/test/common/typetraits/test_isvalid.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/discretization/box/test_boxfvgeometry.cc b/test/discretization/box/test_boxfvgeometry.cc
index 7550d624eda1eb8de9837e3776c915b3f43d47d6..9eb855e5e8073d525ea4ee6bc14bd9a9f54f92b9 100644
--- a/test/discretization/box/test_boxfvgeometry.cc
+++ b/test/discretization/box/test_boxfvgeometry.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/discretization/cellcentered/tpfa/test_tpfafvgeometry.cc b/test/discretization/cellcentered/tpfa/test_tpfafvgeometry.cc
index 2c6d4b1d04dd59158ff3ad8a650202882213f49f..5b08fdcf3bbe663361b1e6d809a27b8c4b3c2c7c 100644
--- a/test/discretization/cellcentered/tpfa/test_tpfafvgeometry.cc
+++ b/test/discretization/cellcentered/tpfa/test_tpfafvgeometry.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/discretization/cellcentered/tpfa/test_tpfafvgeometry_nonconforming.cc b/test/discretization/cellcentered/tpfa/test_tpfafvgeometry_nonconforming.cc
index de1c1d61a612a39d386caa9e221264af2bfdf14c..bf489ac4c42b00267ac93459bd61ae41c9cb0b50 100644
--- a/test/discretization/cellcentered/tpfa/test_tpfafvgeometry_nonconforming.cc
+++ b/test/discretization/cellcentered/tpfa/test_tpfafvgeometry_nonconforming.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/discretization/facecentered/diamond/test_diamondgridgeometry.cc b/test/discretization/facecentered/diamond/test_diamondgridgeometry.cc
index f992d839986cf7ad804ded8efc15c9efce612b07..246debd28c89ddb6522f9936c6e381fb05424688 100644
--- a/test/discretization/facecentered/diamond/test_diamondgridgeometry.cc
+++ b/test/discretization/facecentered/diamond/test_diamondgridgeometry.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/discretization/facecentered/staggered/test_staggeredfvgeometry.cc b/test/discretization/facecentered/staggered/test_staggeredfvgeometry.cc
index c337b726aa839cfabe90fa972019a0d36a83bc69..04f6c8889c83dcb8740f21a8b68e004a6d4a935d 100644
--- a/test/discretization/facecentered/staggered/test_staggeredfvgeometry.cc
+++ b/test/discretization/facecentered/staggered/test_staggeredfvgeometry.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/discretization/pq1bubble/test_pq1bubblefvgeometry.cc b/test/discretization/pq1bubble/test_pq1bubblefvgeometry.cc
index 8810070a95871d28156c0823c681e42045759897..4128712978d07d14e7204fb48797bf64f6431bb7 100644
--- a/test/discretization/pq1bubble/test_pq1bubblefvgeometry.cc
+++ b/test/discretization/pq1bubble/test_pq1bubblefvgeometry.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/discretization/projection/test_l2_projection.cc b/test/discretization/projection/test_l2_projection.cc
index c4a3921009f503cb75d550e74e1ac9bc3801baed..9c2a399c51710f2c40d729091fc1812cc5f376db 100644
--- a/test/discretization/projection/test_l2_projection.cc
+++ b/test/discretization/projection/test_l2_projection.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/discretization/projection/test_projection_2d1d.cc b/test/discretization/projection/test_projection_2d1d.cc
index 0ec08137bd303a698dbf29e085abb093cd775457..73f5e1131c0ba075ee794fbc668fd55b3525052b 100644
--- a/test/discretization/projection/test_projection_2d1d.cc
+++ b/test/discretization/projection/test_projection_2d1d.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/discretization/rotationsymmetry/test_rotationsymmetric_gridgeometry.cc b/test/discretization/rotationsymmetry/test_rotationsymmetric_gridgeometry.cc
index fa54ce4cadc6904041554e5945b439dd1daec5ef..681c8055cf39b6e665403034f5355cce3b077e0c 100644
--- a/test/discretization/rotationsymmetry/test_rotationsymmetric_gridgeometry.cc
+++ b/test/discretization/rotationsymmetry/test_rotationsymmetric_gridgeometry.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/discretization/staggered/test_staggered_free_flow_geometry.cc b/test/discretization/staggered/test_staggered_free_flow_geometry.cc
index fbe6a7a195973216b3621d51b5237dcab25038da..434635f2f95810f568420f0b3d74e2a7a424daf8 100644
--- a/test/discretization/staggered/test_staggered_free_flow_geometry.cc
+++ b/test/discretization/staggered/test_staggered_free_flow_geometry.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/discretization/staggered/test_staggeredfvgeometry.cc b/test/discretization/staggered/test_staggeredfvgeometry.cc
index 1639c4d065e16697bbf62561a36b9f9b433a75a7..c7346a155e03dcd1315bddfa927b1022e2513cbb 100644
--- a/test/discretization/staggered/test_staggeredfvgeometry.cc
+++ b/test/discretization/staggered/test_staggeredfvgeometry.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/discretization/test_walldistance.cc b/test/discretization/test_walldistance.cc
index b66f94422789eaffa3f71b03b8f111d8faacd6a7..3d6a30d64c879748b98030900ed92736d8c35e11 100644
--- a/test/discretization/test_walldistance.cc
+++ b/test/discretization/test_walldistance.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/experimental/discretization/test_fvgridvariables.cc b/test/experimental/discretization/test_fvgridvariables.cc
index 0587dfe3039abe1f9e42587df9a4b63b604c8971..70e4fcf2be86533bc3ff8cfb74db24f567d8b467 100644
--- a/test/experimental/discretization/test_fvgridvariables.cc
+++ b/test/experimental/discretization/test_fvgridvariables.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/experimental/timestepping/test_timestepmethods.cc b/test/experimental/timestepping/test_timestepmethods.cc
index 244fbe66e9b9e81c2bc9138b9998d57a2e6c89f1..41add0a105ad07c7f258232d08a20f35bb1bef51 100644
--- a/test/experimental/timestepping/test_timestepmethods.cc
+++ b/test/experimental/timestepping/test_timestepmethods.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <cmath>
diff --git a/test/flux/test_diffusioncontainers.cc b/test/flux/test_diffusioncontainers.cc
index eb2c1cf676a484ca17194f7e9f24e1e7d5d0e630..26c4ffca929af6c8ae0d3a97624761fb829cbeac 100644
--- a/test/flux/test_diffusioncontainers.cc
+++ b/test/flux/test_diffusioncontainers.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/angeli/main.cc b/test/freeflow/navierstokes/angeli/main.cc
index 923d3cb7f6791940f06e340bc94ca5beb746b7d3..48cb490ea3c12a1cc0907d6bab496b47cc0a586c 100644
--- a/test/freeflow/navierstokes/angeli/main.cc
+++ b/test/freeflow/navierstokes/angeli/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/channel/1d/main.cc b/test/freeflow/navierstokes/channel/1d/main.cc
index ee97c68e78f51458850874f10f95d9113274900f..c0ba0471cb4c2b74b1780d3c2e85621038ca3c49 100644
--- a/test/freeflow/navierstokes/channel/1d/main.cc
+++ b/test/freeflow/navierstokes/channel/1d/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/channel/2d/main.cc b/test/freeflow/navierstokes/channel/2d/main.cc
index e5aad4e5cf03f9d72ba72563979d72a6ff45871c..762786f5dca2d00190680af45993112fd9c7789c 100644
--- a/test/freeflow/navierstokes/channel/2d/main.cc
+++ b/test/freeflow/navierstokes/channel/2d/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/channel/3d/main.cc b/test/freeflow/navierstokes/channel/3d/main.cc
index e330e0e858af0875ce9e79da2f3a80e1820aab9e..481ca42e3f1c3f8b45da404fbeb2f33d2f49f5d7 100644
--- a/test/freeflow/navierstokes/channel/3d/main.cc
+++ b/test/freeflow/navierstokes/channel/3d/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/channel/3d_nonuniform/main.cc b/test/freeflow/navierstokes/channel/3d_nonuniform/main.cc
index 3ce16c8ab19a035e327d3138398b7682b07e4955..c17569c0e2ff851a515c20a16ffb3db5437b09f5 100644
--- a/test/freeflow/navierstokes/channel/3d_nonuniform/main.cc
+++ b/test/freeflow/navierstokes/channel/3d_nonuniform/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/channel/pipe/main.cc b/test/freeflow/navierstokes/channel/pipe/main.cc
index a62d710d3b5c6cb2835aab0571a657ff0e8fb20f..3174f391140db811a6c983de24a9ccd3f535cc79 100644
--- a/test/freeflow/navierstokes/channel/pipe/main.cc
+++ b/test/freeflow/navierstokes/channel/pipe/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/channel/pipe/momentum/main.cc b/test/freeflow/navierstokes/channel/pipe/momentum/main.cc
index 075685cd00097e55f75631081397c23259e0361b..e68b36175d5e18684423995a53e7997e5cb69e62 100644
--- a/test/freeflow/navierstokes/channel/pipe/momentum/main.cc
+++ b/test/freeflow/navierstokes/channel/pipe/momentum/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/donea/main.cc b/test/freeflow/navierstokes/donea/main.cc
index 94a527dddc13f1765eaeb517c30e43f10efcbc9a..895ef0bd90a2025e2354b0adf37b55ca6af46bea 100644
--- a/test/freeflow/navierstokes/donea/main.cc
+++ b/test/freeflow/navierstokes/donea/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/donea/main_momentum.cc b/test/freeflow/navierstokes/donea/main_momentum.cc
index d26f055d2686da82fe21de4b8ab18ba9c5c637bc..66574385b5723f8675ae6c075abd3c68c76929cd 100644
--- a/test/freeflow/navierstokes/donea/main_momentum.cc
+++ b/test/freeflow/navierstokes/donea/main_momentum.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/kovasznay/main.cc b/test/freeflow/navierstokes/kovasznay/main.cc
index f552eb33abea9155512b04f4d77ce6982a9682b2..e6e5d137c6523fb34226fd306ae50f185150f5be 100644
--- a/test/freeflow/navierstokes/kovasznay/main.cc
+++ b/test/freeflow/navierstokes/kovasznay/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/periodic/main.cc b/test/freeflow/navierstokes/periodic/main.cc
index 5b2a0defa675fc9b4654dbd403dbb909f3991667..12383096d4ef5fd6dcfc514e2ff5d6ec0e9eb8c8 100644
--- a/test/freeflow/navierstokes/periodic/main.cc
+++ b/test/freeflow/navierstokes/periodic/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/sincos/main.cc b/test/freeflow/navierstokes/sincos/main.cc
index 54ede4c803d5bdb3b53059e4a2f78b525ff2278e..4f6ed54b32b7a1063c18f0e5718390b5a3fe94b8 100644
--- a/test/freeflow/navierstokes/sincos/main.cc
+++ b/test/freeflow/navierstokes/sincos/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokes/unstructured/main.cc b/test/freeflow/navierstokes/unstructured/main.cc
index 563f829921ab5c3310f04564a07266f3648323d7..eb35f99b8720497c9f220031064e0bc5ffa41f45 100644
--- a/test/freeflow/navierstokes/unstructured/main.cc
+++ b/test/freeflow/navierstokes/unstructured/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokesnc/channel/main.cc b/test/freeflow/navierstokesnc/channel/main.cc
index 96d817b8cc725daaa8979f3df215686736a4867c..0c656a673239ecc10bdd5280966a4a72d64ff5a3 100644
--- a/test/freeflow/navierstokesnc/channel/main.cc
+++ b/test/freeflow/navierstokesnc/channel/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokesnc/densitydrivenflow/main.cc b/test/freeflow/navierstokesnc/densitydrivenflow/main.cc
index b016fa05120c1951ba953a03a0d3644027b8bb8b..9ce622850c12a236ec588af3f62956aac7cb2775 100644
--- a/test/freeflow/navierstokesnc/densitydrivenflow/main.cc
+++ b/test/freeflow/navierstokesnc/densitydrivenflow/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/navierstokesnc/maxwellstefan/main.cc b/test/freeflow/navierstokesnc/maxwellstefan/main.cc
index 04ce698b92d25b62933da78636dd26587ad45471..a7b324d27bd4f0014817a78a8cf16bd06631d640 100644
--- a/test/freeflow/navierstokesnc/maxwellstefan/main.cc
+++ b/test/freeflow/navierstokesnc/maxwellstefan/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/rans/main.cc b/test/freeflow/rans/main.cc
index 685a32fae0c4043136d7a7e220715f64abfff605..f32bb77d119ae8bd833faee5e94566c3c522c59e 100644
--- a/test/freeflow/rans/main.cc
+++ b/test/freeflow/rans/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/ransnc/main.cc b/test/freeflow/ransnc/main.cc
index 168596ca5886ff238d06633b7f054186bd4d1a8b..650f055162f46c9bfd0338cc1aa71f3c4658f2c6 100644
--- a/test/freeflow/ransnc/main.cc
+++ b/test/freeflow/ransnc/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/shallowwater/bowl/main.cc b/test/freeflow/shallowwater/bowl/main.cc
index dd6df53ec5e580ab3f03f829540ad50ce65067e6..33f6943886c0079b3f29bc327642b7364f452fa3 100644
--- a/test/freeflow/shallowwater/bowl/main.cc
+++ b/test/freeflow/shallowwater/bowl/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/shallowwater/dambreak/main.cc b/test/freeflow/shallowwater/dambreak/main.cc
index 26a7f840712bf7ea79d743979a2786386eb3d14a..5e34a275c8e6be088c0a9afff83b5bfae713700a 100644
--- a/test/freeflow/shallowwater/dambreak/main.cc
+++ b/test/freeflow/shallowwater/dambreak/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/shallowwater/poiseuilleflow/main.cc b/test/freeflow/shallowwater/poiseuilleflow/main.cc
index 3563cbbc9604ff868bf527c55896c5e2f678b00b..e9c7a3eb44668e0e04f90ed12769a3a19483a1a7 100644
--- a/test/freeflow/shallowwater/poiseuilleflow/main.cc
+++ b/test/freeflow/shallowwater/poiseuilleflow/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/shallowwater/poiseuilleflow/vertical/main.cc b/test/freeflow/shallowwater/poiseuilleflow/vertical/main.cc
index f0eb49655bac47c45c5ff382e964760b629b16e9..51c87eecab735e782265b462bc247408d5953bb2 100644
--- a/test/freeflow/shallowwater/poiseuilleflow/vertical/main.cc
+++ b/test/freeflow/shallowwater/poiseuilleflow/vertical/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/shallowwater/roughchannel/limitednikuradse/main.cc b/test/freeflow/shallowwater/roughchannel/limitednikuradse/main.cc
index c6e463649a76ae2f22dc8c18798e1f0e9aea5a35..3a93d97706c6af5474e73919e7a8233f1d58dd35 100644
--- a/test/freeflow/shallowwater/roughchannel/limitednikuradse/main.cc
+++ b/test/freeflow/shallowwater/roughchannel/limitednikuradse/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/freeflow/shallowwater/roughchannel/main.cc b/test/freeflow/shallowwater/roughchannel/main.cc
index b77d42e5d762f34e78d2a6d54429ccfe0c642f94..8cbee1c97f5d3bbf2502c0e148666c163cf682b1 100644
--- a/test/freeflow/shallowwater/roughchannel/main.cc
+++ b/test/freeflow/shallowwater/roughchannel/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/geomechanics/elastic/main.cc b/test/geomechanics/elastic/main.cc
index d0ca937992900dd47331dbaacd2bdce420277309..bd93e5a017a5abab1c9f46096d6eebb71162746c 100644
--- a/test/geomechanics/elastic/main.cc
+++ b/test/geomechanics/elastic/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/geomechanics/poroelastic/main.cc b/test/geomechanics/poroelastic/main.cc
index 4f0ec0aca123579ee3d318f03c762d51c1369be9..d5f9981dd06f01a9824d9279641bb48a146b398f 100644
--- a/test/geomechanics/poroelastic/main.cc
+++ b/test/geomechanics/poroelastic/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/geometry/boundingboxtree/test_3d3d_grid_intersection.cc b/test/geometry/boundingboxtree/test_3d3d_grid_intersection.cc
index 673629837a559886c5452c762e30466a03e9c6ff..7c5fe2b985af418ae84c10e303c09f72ac588bf8 100644
--- a/test/geometry/boundingboxtree/test_3d3d_grid_intersection.cc
+++ b/test/geometry/boundingboxtree/test_3d3d_grid_intersection.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/geometry/boundingboxtree/test_bboxtree.cc b/test/geometry/boundingboxtree/test_bboxtree.cc
index 97800e9a2547a9a902562ce73d66f9a5a31b958f..e21cde963c58e662593bfb79549f30bf1806f891 100644
--- a/test/geometry/boundingboxtree/test_bboxtree.cc
+++ b/test/geometry/boundingboxtree/test_bboxtree.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 #include <iostream>
 #include <algorithm>
diff --git a/test/geometry/boundingboxtree/test_geometry_fracture.cc b/test/geometry/boundingboxtree/test_geometry_fracture.cc
index 30e7414fb1ac46742245826273a4026d829ec57a..89c9b0ddf2e3ee403490a93fb1fc0e6ac11c6ef9 100644
--- a/test/geometry/boundingboxtree/test_geometry_fracture.cc
+++ b/test/geometry/boundingboxtree/test_geometry_fracture.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/geometry/test_0d1d_intersection.cc b/test/geometry/test_0d1d_intersection.cc
index 391e21e902243804d5a4345cee94c215086b1f50..1c8ac4720ab632b6b4ad1d809033f2481cddd534 100644
--- a/test/geometry/test_0d1d_intersection.cc
+++ b/test/geometry/test_0d1d_intersection.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/geometry/test_0d2d_intersection.cc b/test/geometry/test_0d2d_intersection.cc
index a9209b13da2065a62c111b27c0500a548519c7b1..2e27da76feff17d636e16efb40744f8dc20856e2 100644
--- a/test/geometry/test_0d2d_intersection.cc
+++ b/test/geometry/test_0d2d_intersection.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/geometry/test_0d3d_intersection.cc b/test/geometry/test_0d3d_intersection.cc
index 66335e81d1b70607a0daa104fe9db12fcce9de40..7a59fdb2a062e59c0795ca755918b16c2ed6c63c 100644
--- a/test/geometry/test_0d3d_intersection.cc
+++ b/test/geometry/test_0d3d_intersection.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/geometry/test_1d1d_intersection.cc b/test/geometry/test_1d1d_intersection.cc
index 2bb332c9e72ef47d212dc477333883900096e0e6..8c75fd3fc13d23290848a37ae90d19dc329d0533 100644
--- a/test/geometry/test_1d1d_intersection.cc
+++ b/test/geometry/test_1d1d_intersection.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/geometry/test_1d2d_intersection.cc b/test/geometry/test_1d2d_intersection.cc
index 920af49c612d8a715b0fab37319a532418340208..d4cf483f194350337b9e38d21f4453f9b9709500 100644
--- a/test/geometry/test_1d2d_intersection.cc
+++ b/test/geometry/test_1d2d_intersection.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/geometry/test_1d3d_intersection.cc b/test/geometry/test_1d3d_intersection.cc
index 6df0b3db53218277e36ac30dd0ae749276e96ef6..8ed52318f98befe513fb902f094557d6e86d1b56 100644
--- a/test/geometry/test_1d3d_intersection.cc
+++ b/test/geometry/test_1d3d_intersection.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/geometry/test_2d2d_intersection.cc b/test/geometry/test_2d2d_intersection.cc
index 4833db40149ef6f6ec2f3dd295dbaf605fb5f9ed..8ea05af26baf06fd43963ee4be972c55ad3798e6 100644
--- a/test/geometry/test_2d2d_intersection.cc
+++ b/test/geometry/test_2d2d_intersection.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/geometry/test_2d3d_intersection.cc b/test/geometry/test_2d3d_intersection.cc
index bf06825c0d4b01dafcdafc10d1cbd12158902c31..cde98412aa34ad76b9134df4d476227b86d11729 100644
--- a/test/geometry/test_2d3d_intersection.cc
+++ b/test/geometry/test_2d3d_intersection.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 // graham convex hull test + triangulation
 #include <config.h>
 
diff --git a/test/geometry/test_3d3d_intersection.cc b/test/geometry/test_3d3d_intersection.cc
index 0fbd7b211d65cc19f0c2bec9f1698aa85657a73a..d7110ea76459d9a5f7dfeb014f8d07e292e79ba4 100644
--- a/test/geometry/test_3d3d_intersection.cc
+++ b/test/geometry/test_3d3d_intersection.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 // graham convex hull test + triangulation
 #include <config.h>
 
diff --git a/test/geometry/test_circlepoints.cc b/test/geometry/test_circlepoints.cc
index 3b5a02750c9d628731436429f5a596572fdb78cf..9f1479b93bd29e90cafe72f2b70809dc0175ee3b 100644
--- a/test/geometry/test_circlepoints.cc
+++ b/test/geometry/test_circlepoints.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <cmath>
diff --git a/test/geometry/test_cylinderintegration.cc b/test/geometry/test_cylinderintegration.cc
index f756c24dbbdf83801ef280aefb1548df7accaeda..25e48d38d0c7ead5565884655d8f98f34d603be5 100644
--- a/test/geometry/test_cylinderintegration.cc
+++ b/test/geometry/test_cylinderintegration.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/geometry/test_distance.cc b/test/geometry/test_distance.cc
index 8d6a93b4a897f95a63e38f5fc863ca4a7ecf4968..abb0ca384ab9930b2326e6914c91085d0282c9b8 100644
--- a/test/geometry/test_distance.cc
+++ b/test/geometry/test_distance.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/geometry/test_intersectingentity_cartesiangrid.cc b/test/geometry/test_intersectingentity_cartesiangrid.cc
index 7f2930de21809129aafd2a7e82e55ebe0977254e..66ee650af0c535369fa6107de4ebcd76c5a2900d 100644
--- a/test/geometry/test_intersectingentity_cartesiangrid.cc
+++ b/test/geometry/test_intersectingentity_cartesiangrid.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <dune/common/fvector.hh>
diff --git a/test/geometry/test_intersectionentityset.cc b/test/geometry/test_intersectionentityset.cc
index 7e424356263a74a772080cfaf194fa836d4bb6c0..1aa6520075b2b840629f6c17454dc600a9ed4943 100644
--- a/test/geometry/test_intersectionentityset.cc
+++ b/test/geometry/test_intersectionentityset.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <memory>
diff --git a/test/geometry/test_makegeometry.cc b/test/geometry/test_makegeometry.cc
index c4dd37b0b5ade6e23469e75eb94516560dcd2290..8cd04224a92fbd7c4c09455ed4e7812736115564 100644
--- a/test/geometry/test_makegeometry.cc
+++ b/test/geometry/test_makegeometry.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/geometry/test_normal.cc b/test/geometry/test_normal.cc
index f947a92b5cce90159e2c7fde9b6298e6ebc91c48..cd0676b3c85e9410391a7d3964d8110923cb3746 100644
--- a/test/geometry/test_normal.cc
+++ b/test/geometry/test_normal.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/geometry/test_refinementquadraturerule.cc b/test/geometry/test_refinementquadraturerule.cc
index 479fad4d71a73bae232030e0783b1996f644d9c5..518e81d122bb827d51cfe49cb8677399ed883d91 100644
--- a/test/geometry/test_refinementquadraturerule.cc
+++ b/test/geometry/test_refinementquadraturerule.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/geometry/test_triangulate_convex_hull.cc b/test/geometry/test_triangulate_convex_hull.cc
index 5e9cd1c68c1c63396686000c07ffdb660ccd7a07..f7870420f6ec7d1e5deeae7776eb10c58c38995a 100644
--- a/test/geometry/test_triangulate_convex_hull.cc
+++ b/test/geometry/test_triangulate_convex_hull.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 // graham convex hull test + triangulation
 #include <config.h>
 
diff --git a/test/geometry/test_volume.cc b/test/geometry/test_volume.cc
index 8e567b4fb81da288145aed5003d909a561afac25..e737f795443934e8fc93253817ae4da5ec22d8c3 100644
--- a/test/geometry/test_volume.cc
+++ b/test/geometry/test_volume.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <vector>
diff --git a/test/io/container/test_container_io.cc b/test/io/container/test_container_io.cc
index 81bad7eab2b0325b5b76615fb53f6aeb503242f0..ddaaa55a8d4942ee4d1c44e924ed387f8617d76f 100644
--- a/test/io/container/test_container_io.cc
+++ b/test/io/container/test_container_io.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/format/test_format.cc b/test/io/format/test_format.cc
index 856f33037a9686075bc7e9a413c4dc8c9031610d..a799b60b6e0e136d5a7d9769b04575a85895fbd2 100644
--- a/test/io/format/test_format.cc
+++ b/test/io/format/test_format.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <cmath>
diff --git a/test/io/gnuplotinterface/test_gnuplotinterface.cc b/test/io/gnuplotinterface/test_gnuplotinterface.cc
index eaf96976a537b1ca097ffc1df634339645ed3219..422fa6da547d98d5d8cd358ba95057694e4e1573 100644
--- a/test/io/gnuplotinterface/test_gnuplotinterface.cc
+++ b/test/io/gnuplotinterface/test_gnuplotinterface.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/gridmanager/test_gmshboundaryflag.cc b/test/io/gridmanager/test_gmshboundaryflag.cc
index f347d29624e32d8c4f74be7c0aab9d790a6e22cc..d99b4a3b9b4384683509947fcfc64708cc9aff3a 100644
--- a/test/io/gridmanager/test_gmshboundaryflag.cc
+++ b/test/io/gridmanager/test_gmshboundaryflag.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/gridmanager/test_gridmanager_cake.cc b/test/io/gridmanager/test_gridmanager_cake.cc
index ea2b277f075aef9d52f02fb50113b5aa2bdf5e56..c6edecb5ec1da854ba2a3c0972db48cd7e3d051d 100644
--- a/test/io/gridmanager/test_gridmanager_cake.cc
+++ b/test/io/gridmanager/test_gridmanager_cake.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/gridmanager/test_gridmanager_dgf.cc b/test/io/gridmanager/test_gridmanager_dgf.cc
index cc20787c90015d1fa035c1609e616634cb6311b0..3d7d22b37b4251bf3e669c7e82f2f150b52b8092 100644
--- a/test/io/gridmanager/test_gridmanager_dgf.cc
+++ b/test/io/gridmanager/test_gridmanager_dgf.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/gridmanager/test_gridmanager_gmsh_3d.cc b/test/io/gridmanager/test_gridmanager_gmsh_3d.cc
index d89ce8b6cdbcca70a366b30af1d0132f4f56748a..c294e8ba9b416582b3485c1a3563e27afac148d6 100644
--- a/test/io/gridmanager/test_gridmanager_gmsh_3d.cc
+++ b/test/io/gridmanager/test_gridmanager_gmsh_3d.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/gridmanager/test_gridmanager_gmsh_e_markers.cc b/test/io/gridmanager/test_gridmanager_gmsh_e_markers.cc
index 57b842a9a0f9f419103904a873ee29b9da7056a8..4df2681750b904dcd4d557133a1008b1854c2f23 100644
--- a/test/io/gridmanager/test_gridmanager_gmsh_e_markers.cc
+++ b/test/io/gridmanager/test_gridmanager_gmsh_e_markers.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/gridmanager/test_gridmanager_mmesh.cc b/test/io/gridmanager/test_gridmanager_mmesh.cc
index e273c59ad04a49195ad7b64b2a88cc3c2e3b3ff5..9a2b6d1dee59c8a03cf353f5f760d1e990ed8895 100644
--- a/test/io/gridmanager/test_gridmanager_mmesh.cc
+++ b/test/io/gridmanager/test_gridmanager_mmesh.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/gridmanager/test_gridmanager_subgrid.cc b/test/io/gridmanager/test_gridmanager_subgrid.cc
index e1f03e698eeb622c6b2a29578821c2303eb59482..943b164cc007300ad3aee43cb577d2da4b9ad4b0 100644
--- a/test/io/gridmanager/test_gridmanager_subgrid.cc
+++ b/test/io/gridmanager/test_gridmanager_subgrid.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/gridmanager/test_gridmanager_vtk.cc b/test/io/gridmanager/test_gridmanager_vtk.cc
index cd06fb35ecdd4732a34ca0a20f85f7a8140494ce..3aceb676a03838f5394618d3af74ed996c333d2b 100644
--- a/test/io/gridmanager/test_gridmanager_vtk.cc
+++ b/test/io/gridmanager/test_gridmanager_vtk.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/gridmanager/test_pnm_gridmanager.cc b/test/io/gridmanager/test_pnm_gridmanager.cc
index b20fcd1baf36c11365d8b2e76402b0f65f448451..c99093c38d2d071a0187cc50a8bb95a82330a5f4 100644
--- a/test/io/gridmanager/test_pnm_gridmanager.cc
+++ b/test/io/gridmanager/test_pnm_gridmanager.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/gridmanager/test_pnm_subgriddata.cc b/test/io/gridmanager/test_pnm_subgriddata.cc
index 156208bc7e606f8b63f758c4360f24eed662cfe6..a94a4fc1cfe3e7bc8aeaf141238250a01ed8431b 100644
--- a/test/io/gridmanager/test_pnm_subgriddata.cc
+++ b/test/io/gridmanager/test_pnm_subgriddata.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/inputdata/test_io_data_input.cc b/test/io/inputdata/test_io_data_input.cc
index 0be56eb9c3c8193e662653d83e0a29c869fc32d5..400a139be7b44c54705820eff2b0a13071abb9d2 100644
--- a/test/io/inputdata/test_io_data_input.cc
+++ b/test/io/inputdata/test_io_data_input.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/rasterimagereader/test_rasterimagereader.cc b/test/io/rasterimagereader/test_rasterimagereader.cc
index a125d4c69f4307b2707da3a6f5b39a54bb5bb5fb..1fe962356d54cbe71784573e4a24113718b124dd 100644
--- a/test/io/rasterimagereader/test_rasterimagereader.cc
+++ b/test/io/rasterimagereader/test_rasterimagereader.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/vtk/test_vtk_staggeredfreeflowpvnames.cc b/test/io/vtk/test_vtk_staggeredfreeflowpvnames.cc
index 39460a8d917dfb99e951753a2b2ea90fe3e28cbb..5c9cede6071e41d46591e1cf07b4a91da1a4fab2 100644
--- a/test/io/vtk/test_vtk_staggeredfreeflowpvnames.cc
+++ b/test/io/vtk/test_vtk_staggeredfreeflowpvnames.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/io/vtk/test_vtkoutputmodule.cc b/test/io/vtk/test_vtkoutputmodule.cc
index de763412c4a7c59b792868d4391f944b4dd07a62..288fbdd34ddeccd9d3a572990fe0e0ee86fb7929 100644
--- a/test/io/vtk/test_vtkoutputmodule.cc
+++ b/test/io/vtk/test_vtkoutputmodule.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <array>
diff --git a/test/io/vtk/test_vtkreader.cc b/test/io/vtk/test_vtkreader.cc
index adc90ec5787a37dac60704dffb6853c544e72a60..116f86427c46acd3bf8fcb130dd1a39a0f600dbc 100644
--- a/test/io/vtk/test_vtkreader.cc
+++ b/test/io/vtk/test_vtkreader.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/linear/test_dunevectors.cc b/test/linear/test_dunevectors.cc
index e021e1fdc4fd76e388ecc76edf32c2608f1f772c..7ff20c69127f01f5ff95fb440252778b9ef417e0 100644
--- a/test/linear/test_dunevectors.cc
+++ b/test/linear/test_dunevectors.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <type_traits>
diff --git a/test/linear/test_linearsolver.cc b/test/linear/test_linearsolver.cc
index c268d399d777f6a1fc5d8eae53e3d9aa209de719..30acefe685b6c7a5f129776d3ba9618870d4f62a 100644
--- a/test/linear/test_linearsolver.cc
+++ b/test/linear/test_linearsolver.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/linear/test_parallel_amg_smoothers.cc b/test/linear/test_parallel_amg_smoothers.cc
index 013bdfa375107a0e292b9a1046f20d1670acd4de..48aa277c43591e9ffb549869e7d2fc7a315a861f 100644
--- a/test/linear/test_parallel_amg_smoothers.cc
+++ b/test/linear/test_parallel_amg_smoothers.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/linear/test_scalarproducts.cc b/test/linear/test_scalarproducts.cc
index 6def8db0002cadc4ceed5a1ca543030d6c960fcf..319f78132522b5de9bffd63b89d994c1ef087df3 100644
--- a/test/linear/test_scalarproducts.cc
+++ b/test/linear/test_scalarproducts.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <dune/common/indices.hh>
diff --git a/test/material/binarycoefficients/test_binarycoefficients.cc b/test/material/binarycoefficients/test_binarycoefficients.cc
index 31eaeb7bcf92fa1f97a4f7da9e27c1544bf55223..0b737f39f4a3377f4abedbad16e956b9cab3a62e 100644
--- a/test/material/binarycoefficients/test_binarycoefficients.cc
+++ b/test/material/binarycoefficients/test_binarycoefficients.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/components/plotproperties.cc b/test/material/components/plotproperties.cc
index bfbf8b0870fa7e32f2010284ec42917705c65c33..c155e59f538399ac7be4a08845a5abfa9bbdddd5 100644
--- a/test/material/components/plotproperties.cc
+++ b/test/material/components/plotproperties.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/components/test_componenttraits.cc b/test/material/components/test_componenttraits.cc
index e73344c6c597a4439d7f24aa12adaf5d156c8b1e..1c1ed2c423a2fe643ff3604a653fca325622f2d5 100644
--- a/test/material/components/test_componenttraits.cc
+++ b/test/material/components/test_componenttraits.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/compositionalflash/test_compositionalflash.cc b/test/material/compositionalflash/test_compositionalflash.cc
index bd096ee64392a657fde8241254155a38919d2594..574f135467d703886ca786a61a3e219f20b05b81 100644
--- a/test/material/compositionalflash/test_compositionalflash.cc
+++ b/test/material/compositionalflash/test_compositionalflash.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/fluidmatrixinteractions/2p/test_material_2p_brookscorey.cc b/test/material/fluidmatrixinteractions/2p/test_material_2p_brookscorey.cc
index 81f5d15930f9c56329ef9d07b745e01029686d76..0412a961ca434146ab0657e2e46e8467ddd408a0 100644
--- a/test/material/fluidmatrixinteractions/2p/test_material_2p_brookscorey.cc
+++ b/test/material/fluidmatrixinteractions/2p/test_material_2p_brookscorey.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <dune/common/float_cmp.hh>
diff --git a/test/material/fluidmatrixinteractions/2p/test_material_2p_dataspline.cc b/test/material/fluidmatrixinteractions/2p/test_material_2p_dataspline.cc
index 82e66f2482eaddacb54283c1c355fdf77ea81aa2..620bfdcf00fd32b6844017c29791a34264c2a8b6 100644
--- a/test/material/fluidmatrixinteractions/2p/test_material_2p_dataspline.cc
+++ b/test/material/fluidmatrixinteractions/2p/test_material_2p_dataspline.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/fluidmatrixinteractions/2p/test_material_2p_spline.cc b/test/material/fluidmatrixinteractions/2p/test_material_2p_spline.cc
index fe123a17ea4480be9889278449d9cba55e73559e..6b97f5b28ebe92f8dafc25e2ee8fd44efcea7d07 100644
--- a/test/material/fluidmatrixinteractions/2p/test_material_2p_spline.cc
+++ b/test/material/fluidmatrixinteractions/2p/test_material_2p_spline.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/fluidmatrixinteractions/2p/test_material_2p_vangenuchten.cc b/test/material/fluidmatrixinteractions/2p/test_material_2p_vangenuchten.cc
index f092cbe9d32b831abb02bb04165d921b96afd5f1..b217d8b9059f21677ec700e28a484b420847893a 100644
--- a/test/material/fluidmatrixinteractions/2p/test_material_2p_vangenuchten.cc
+++ b/test/material/fluidmatrixinteractions/2p/test_material_2p_vangenuchten.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <dune/common/float_cmp.hh>
diff --git a/test/material/fluidmatrixinteractions/2p/test_thermalconductivity.cc b/test/material/fluidmatrixinteractions/2p/test_thermalconductivity.cc
index 59e677062d0e343ade7ca420cf216ecdc554fc29..72499ec9083a861d4eea5db295a0a7f83ba6ece0 100644
--- a/test/material/fluidmatrixinteractions/2p/test_thermalconductivity.cc
+++ b/test/material/fluidmatrixinteractions/2p/test_thermalconductivity.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/fluidmatrixinteractions/porenetwork/test_material_2p_porenetwork.cc b/test/material/fluidmatrixinteractions/porenetwork/test_material_2p_porenetwork.cc
index 2e7d163647653a57cbc895cc89793ea8a56ddf20..7e13f2292f513acd4c2b64660146547ac2d64842 100644
--- a/test/material/fluidmatrixinteractions/porenetwork/test_material_2p_porenetwork.cc
+++ b/test/material/fluidmatrixinteractions/porenetwork/test_material_2p_porenetwork.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <dune/common/float_cmp.hh>
diff --git a/test/material/fluidmatrixinteractions/porenetwork/test_throattransmissibility.cc b/test/material/fluidmatrixinteractions/porenetwork/test_throattransmissibility.cc
index 8383921de8bcd49e0b4474387ffca2d0d46606b6..ca6042871eb1edbdef62d5235d157aef8c248765 100644
--- a/test/material/fluidmatrixinteractions/porenetwork/test_throattransmissibility.cc
+++ b/test/material/fluidmatrixinteractions/porenetwork/test_throattransmissibility.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/fluidmatrixinteractions/test_effectivediffusivity.cc b/test/material/fluidmatrixinteractions/test_effectivediffusivity.cc
index fe6ded9d8c144de9f4c2ec51b50bc9a74d721d96..fd83cb8467309296159b0689724d8430f66bf755 100644
--- a/test/material/fluidmatrixinteractions/test_effectivediffusivity.cc
+++ b/test/material/fluidmatrixinteractions/test_effectivediffusivity.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/fluidsystems/test_fluidsystems.cc b/test/material/fluidsystems/test_fluidsystems.cc
index 21659c1dd8f48da84c6f310067134562d51156f0..9ef593e9bd6a96406e2f2e72eebea86df10b7a35 100644
--- a/test/material/fluidsystems/test_fluidsystems.cc
+++ b/test/material/fluidsystems/test_fluidsystems.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/immiscibleflash/test_immiscibleflash.cc b/test/material/immiscibleflash/test_immiscibleflash.cc
index e4cd4ec255c3c4c9d29918dca348ecf059129d46..ffd15a96d0dfb494c1025a651d7373e0c5d17b5a 100644
--- a/test/material/immiscibleflash/test_immiscibleflash.cc
+++ b/test/material/immiscibleflash/test_immiscibleflash.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/ncpflash/test_ncpflash.cc b/test/material/ncpflash/test_ncpflash.cc
index d7b83fbbfc44a96c0c330d219d470e9bbcbe2874..1cf6a5500fc8f737dbbb7de2e992be9f8c34faa9 100644
--- a/test/material/ncpflash/test_ncpflash.cc
+++ b/test/material/ncpflash/test_ncpflash.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/pengrobinson/test_pengrobinson.cc b/test/material/pengrobinson/test_pengrobinson.cc
index 80865d29ded0a83785f91abb93fa239cf37fa1ad..c4c225243786b37dc42f1a36445506b0f0aa653f 100644
--- a/test/material/pengrobinson/test_pengrobinson.cc
+++ b/test/material/pengrobinson/test_pengrobinson.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/solidsystems/test_solidsystems.cc b/test/material/solidsystems/test_solidsystems.cc
index 170d603775a4fee704f66c9de7f607d1ac8171f9..f332502c14ef1600ae4b41eefcc602583a4541c9 100644
--- a/test/material/solidsystems/test_solidsystems.cc
+++ b/test/material/solidsystems/test_solidsystems.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/material/tabulation/test_tabulation.cc b/test/material/tabulation/test_tabulation.cc
index 7265ab56ef61cabfc54e9f32094780e6d32b8da4..4102629041db86b7ced9f5cd6eecc06b515cd61a 100644
--- a/test/material/tabulation/test_tabulation.cc
+++ b/test/material/tabulation/test_tabulation.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/darcydarcy/1p_1p/main.cc b/test/multidomain/boundary/darcydarcy/1p_1p/main.cc
index 7327de85e7a3eda86e4beb2a1dd7a32ceadaaab3..b7d9b23c629a71a64645b422c54cea494ec24928 100644
--- a/test/multidomain/boundary/darcydarcy/1p_1p/main.cc
+++ b/test/multidomain/boundary/darcydarcy/1p_1p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/darcydarcy/1p_2p/main.cc b/test/multidomain/boundary/darcydarcy/1p_2p/main.cc
index cdcc25ac21e0f3900af9b6282c93a6ed6ffab42f..a8ebbf30cb7761b8ea5faf73eb9d7bb0b786fa5f 100644
--- a/test/multidomain/boundary/darcydarcy/1p_2p/main.cc
+++ b/test/multidomain/boundary/darcydarcy/1p_2p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/freeflowporenetwork/1p_1p/main.cc b/test/multidomain/boundary/freeflowporenetwork/1p_1p/main.cc
index 1e72342e1ae4b96b3da23dfcecf0783e4616b0be..e286341f1942ab50ae45ba4db8517d109227afe3 100644
--- a/test/multidomain/boundary/freeflowporenetwork/1p_1p/main.cc
+++ b/test/multidomain/boundary/freeflowporenetwork/1p_1p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/freeflowporousmedium/1p_1p/convergence/main.cc b/test/multidomain/boundary/freeflowporousmedium/1p_1p/convergence/main.cc
index 91860583557c2ece6f28f1cc44155b2f2397590d..ac6cd26cad6bad54c5a2d4745a813dc0f2c5902f 100644
--- a/test/multidomain/boundary/freeflowporousmedium/1p_1p/convergence/main.cc
+++ b/test/multidomain/boundary/freeflowporousmedium/1p_1p/convergence/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/freeflowporousmedium/1p_1p/main.cc b/test/multidomain/boundary/freeflowporousmedium/1p_1p/main.cc
index 6f8ae756b6f04eef66cfd6e3c9444b89f7f264e9..74aebdff73281d3db850ee57535f6f7c6466f857 100644
--- a/test/multidomain/boundary/freeflowporousmedium/1p_1p/main.cc
+++ b/test/multidomain/boundary/freeflowporousmedium/1p_1p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/stokesdarcy/1p2c_1p2c/diffusionlawcomparison/main.cc b/test/multidomain/boundary/stokesdarcy/1p2c_1p2c/diffusionlawcomparison/main.cc
index 92b4d6416fd51c8a0764c2d3bae1a96174048ad3..1ed8ea08ea2c73a4b001efc1d0d9e1c922e7f3d6 100644
--- a/test/multidomain/boundary/stokesdarcy/1p2c_1p2c/diffusionlawcomparison/main.cc
+++ b/test/multidomain/boundary/stokesdarcy/1p2c_1p2c/diffusionlawcomparison/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/stokesdarcy/1p2c_1p2c/main.cc b/test/multidomain/boundary/stokesdarcy/1p2c_1p2c/main.cc
index 2f392a88600c83f72dfe0caaa784df34efe4d2f7..98ce2fbd63d36ed933558a1dab9e50b12d675aee 100644
--- a/test/multidomain/boundary/stokesdarcy/1p2c_1p2c/main.cc
+++ b/test/multidomain/boundary/stokesdarcy/1p2c_1p2c/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/stokesdarcy/1p2c_2p2c/main.cc b/test/multidomain/boundary/stokesdarcy/1p2c_2p2c/main.cc
index 2b4b0a65ef925dc0351d5159c2ccc1feacc0c46d..0e296a83492f3e407526605a20eb7adf7016efb1 100644
--- a/test/multidomain/boundary/stokesdarcy/1p2c_2p2c/main.cc
+++ b/test/multidomain/boundary/stokesdarcy/1p2c_2p2c/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/stokesdarcy/1p3c_1p3c/main.cc b/test/multidomain/boundary/stokesdarcy/1p3c_1p3c/main.cc
index f4d3c86ba1de7a551865af0fc426f6a8a77fccab..7917c34719b4d8375b4a4bdd5e58162d4522a6c2 100644
--- a/test/multidomain/boundary/stokesdarcy/1p3c_1p3c/main.cc
+++ b/test/multidomain/boundary/stokesdarcy/1p3c_1p3c/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/stokesdarcy/1p_1p/convergencetest/main.cc b/test/multidomain/boundary/stokesdarcy/1p_1p/convergencetest/main.cc
index 39ef7e1759fbabcf52304c0b4f39fb2adaf30bfd..9fa429b0e7da57b83ed878fd4c0b7cb3efb2de4b 100644
--- a/test/multidomain/boundary/stokesdarcy/1p_1p/convergencetest/main.cc
+++ b/test/multidomain/boundary/stokesdarcy/1p_1p/convergencetest/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/stokesdarcy/1p_1p/main.cc b/test/multidomain/boundary/stokesdarcy/1p_1p/main.cc
index 7a0f34ddb44945a60e1f830341189fe5e20e6763..cc84be40039715afe79e566fd891a35395053534 100644
--- a/test/multidomain/boundary/stokesdarcy/1p_1p/main.cc
+++ b/test/multidomain/boundary/stokesdarcy/1p_1p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/boundary/stokesdarcy/1p_2p/main.cc b/test/multidomain/boundary/stokesdarcy/1p_2p/main.cc
index 8458a2cab74db1510b1b3bb3c20c052d775536ba..a4e975eaf7c17ef015c335c31c5c4b144e106bf7 100644
--- a/test/multidomain/boundary/stokesdarcy/1p_2p/main.cc
+++ b/test/multidomain/boundary/stokesdarcy/1p_2p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/embedded/1d3d/1p2c_richards2c/main.cc b/test/multidomain/embedded/1d3d/1p2c_richards2c/main.cc
index 0cecaa07cad5ef05e24743b49c30bfc65265051e..010e705de42d5060603f357190c5092c1d2f2df2 100644
--- a/test/multidomain/embedded/1d3d/1p2c_richards2c/main.cc
+++ b/test/multidomain/embedded/1d3d/1p2c_richards2c/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/embedded/1d3d/1p_1p/main.cc b/test/multidomain/embedded/1d3d/1p_1p/main.cc
index 48715f89f3a406bd78127f4f7b950b1fbaafada9..dfa098906772e2947750e4fc3d00cb5901cc93ab 100644
--- a/test/multidomain/embedded/1d3d/1p_1p/main.cc
+++ b/test/multidomain/embedded/1d3d/1p_1p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/embedded/1d3d/1p_richards/main.cc b/test/multidomain/embedded/1d3d/1p_richards/main.cc
index 433234c27e2e0ed55515fb460dceab2b4a8ab09f..88039ec85e00de50ce8ee44def97d9da140015f3 100644
--- a/test/multidomain/embedded/1d3d/1p_richards/main.cc
+++ b/test/multidomain/embedded/1d3d/1p_richards/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/embedded/2d3d/1p_1p/main.cc b/test/multidomain/embedded/2d3d/1p_1p/main.cc
index d9fa37f82ae86e1469daf81b03083cb3365518cc..41cca8102f1d9f84138a125c16e7a4661cdb27bf 100644
--- a/test/multidomain/embedded/2d3d/1p_1p/main.cc
+++ b/test/multidomain/embedded/2d3d/1p_1p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/facet/1p_1p/analytical/main.cc b/test/multidomain/facet/1p_1p/analytical/main.cc
index 56918fccc74b78b84ba19b5fe75e1df49eaa6963..7c0398b251da10fb3354c3301a93a222e08bb288 100644
--- a/test/multidomain/facet/1p_1p/analytical/main.cc
+++ b/test/multidomain/facet/1p_1p/analytical/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/facet/1p_1p/gravity/main.cc b/test/multidomain/facet/1p_1p/gravity/main.cc
index f139d5a338f4b59c990821ea28f7ea6cf593eeca..33b3e1e9e75259c977c3e25471b82bf29271d016 100644
--- a/test/multidomain/facet/1p_1p/gravity/main.cc
+++ b/test/multidomain/facet/1p_1p/gravity/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/facet/1p_1p/linearprofile/main.cc b/test/multidomain/facet/1p_1p/linearprofile/main.cc
index e5ccc364e95fb8e32a4c4ec7abbd5b6e4201e5e6..38842b9cc79493ddbe6b0984da48d3682b266557 100644
--- a/test/multidomain/facet/1p_1p/linearprofile/main.cc
+++ b/test/multidomain/facet/1p_1p/linearprofile/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/facet/1p_1p/threedomain/main.cc b/test/multidomain/facet/1p_1p/threedomain/main.cc
index 6bc02d05245b35c4ae40eec2e0b56f51610820b0..669cf888e6c239dc80c1bab2cd57c45abeefeb0e 100644
--- a/test/multidomain/facet/1p_1p/threedomain/main.cc
+++ b/test/multidomain/facet/1p_1p/threedomain/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/facet/1pnc_1pnc/main.cc b/test/multidomain/facet/1pnc_1pnc/main.cc
index 9d885829efe2b64c4048e41cca32c35df73af203..52ed608c6a6109a0f71642c1625a143e849f8e8d 100644
--- a/test/multidomain/facet/1pnc_1pnc/main.cc
+++ b/test/multidomain/facet/1pnc_1pnc/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/facet/test_facetcouplingmapper.cc b/test/multidomain/facet/test_facetcouplingmapper.cc
index 18ff376421108b594d8cd91883f7fd31f16a22b7..0dc178cfba49ce8bde6fdbf4fe070e7ffc843f45 100644
--- a/test/multidomain/facet/test_facetcouplingmapper.cc
+++ b/test/multidomain/facet/test_facetcouplingmapper.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/facet/test_facetcouplingmapper_boundary.cc b/test/multidomain/facet/test_facetcouplingmapper_boundary.cc
index efe11c18a7a0f725e2c545786c24ff5a9d8b2982..aded383a539be29da2bacc559abdb958172e1ca2 100644
--- a/test/multidomain/facet/test_facetcouplingmapper_boundary.cc
+++ b/test/multidomain/facet/test_facetcouplingmapper_boundary.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/facet/test_gridmanager.cc b/test/multidomain/facet/test_gridmanager.cc
index 29a17a7f30775a724c9cded7e1b80f341ae78d40..bff69f9d15969b22df245e065683e0964130fee5 100644
--- a/test/multidomain/facet/test_gridmanager.cc
+++ b/test/multidomain/facet/test_gridmanager.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/facet/test_vertexmapper.cc b/test/multidomain/facet/test_vertexmapper.cc
index eb573018cac294c716faf7ee45a4816faff23022..f520a2a68c7cb658eb80be69b7442f62378393bc 100644
--- a/test/multidomain/facet/test_vertexmapper.cc
+++ b/test/multidomain/facet/test_vertexmapper.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/facet/tracer_tracer/main.cc b/test/multidomain/facet/tracer_tracer/main.cc
index d70253fa0a8e19638e1bf48bf07655a8808dd85a..273afb9f00003f61d7e43076bd58a8e49d8dfe97 100644
--- a/test/multidomain/facet/tracer_tracer/main.cc
+++ b/test/multidomain/facet/tracer_tracer/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/poromechanics/el1p/main.cc b/test/multidomain/poromechanics/el1p/main.cc
index 810a815ec28559dc4cb3fd1a14525d1a61dd99e0..c09b993bbb158f37ecdf281ddf2b19d8f77f1984 100644
--- a/test/multidomain/poromechanics/el1p/main.cc
+++ b/test/multidomain/poromechanics/el1p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/multidomain/poromechanics/el2p/main.cc b/test/multidomain/poromechanics/el2p/main.cc
index cdd2f1d4be80e58f0a63377103fd4da747fe7f44..5cdf1b9e4e03cd1174d199bd83251a40b9721673 100644
--- a/test/multidomain/poromechanics/el2p/main.cc
+++ b/test/multidomain/poromechanics/el2p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/nonlinear/findscalarroot/test_findscalarroot.cc b/test/nonlinear/findscalarroot/test_findscalarroot.cc
index d008aff2b7e283165c8551db7646bd72d6fd19b9..ceb20f2be89a84b9cceeee4983b7c161d8f5dab1 100644
--- a/test/nonlinear/findscalarroot/test_findscalarroot.cc
+++ b/test/nonlinear/findscalarroot/test_findscalarroot.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/nonlinear/newton/test_newton.cc b/test/nonlinear/newton/test_newton.cc
index 0b29503833b2d706de0eb51a1f032e44f0da039f..2ce88a9f33751bcc53573eda2f65250c681ad991 100644
--- a/test/nonlinear/newton/test_newton.cc
+++ b/test/nonlinear/newton/test_newton.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/nonlinear/newton/test_newton_parallel.cc b/test/nonlinear/newton/test_newton_parallel.cc
index 20b4fe32e468f7c0224d9ac1ba6be556f31eeb2e..a0a1a6067f5eaa7256828f312050811541c5b609 100644
--- a/test/nonlinear/newton/test_newton_parallel.cc
+++ b/test/nonlinear/newton/test_newton_parallel.cc
@@ -1,3 +1,7 @@
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 #include <config.h>
 
 #include <iostream>
diff --git a/test/parallel/partition/main.cc b/test/parallel/partition/main.cc
index 92c0571980c6f9038ac70fe241afe9f37ec57498..5b42258d61ea7662abd56a1041a7f0f062358d53 100644
--- a/test/parallel/partition/main.cc
+++ b/test/parallel/partition/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porenetwork/1p/main.cc b/test/porenetwork/1p/main.cc
index cafea70b7c18f31b784e81489061fe1ac269bb79..f6bdf99c69e365abd91dee7158ab1ba3321d6933 100644
--- a/test/porenetwork/1p/main.cc
+++ b/test/porenetwork/1p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porenetwork/1p/noncreepingflow/main.cc b/test/porenetwork/1p/noncreepingflow/main.cc
index 1bb3ca993b45363e533692b30b3b2b8f9e0f12f8..6952dd45e8d23d0dfda2085961661df3a0982be7 100644
--- a/test/porenetwork/1p/noncreepingflow/main.cc
+++ b/test/porenetwork/1p/noncreepingflow/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porenetwork/1p/noncreepingflow/nonisothermal/main.cc b/test/porenetwork/1p/noncreepingflow/nonisothermal/main.cc
index 83bcff081765a36441b7412fb7eb3fa3549faa3d..4dab89265b6e728151b7640e7e6627159741d5bc 100644
--- a/test/porenetwork/1p/noncreepingflow/nonisothermal/main.cc
+++ b/test/porenetwork/1p/noncreepingflow/nonisothermal/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porenetwork/1p/nonisothermal/main.cc b/test/porenetwork/1p/nonisothermal/main.cc
index 155ee576996d08adf715fb3af0029189c9875d25..50e2de09a36c7857a54df933311efc11fb58f14e 100644
--- a/test/porenetwork/1p/nonisothermal/main.cc
+++ b/test/porenetwork/1p/nonisothermal/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porenetwork/1pnc/main.cc b/test/porenetwork/1pnc/main.cc
index ed128a861e40bb1ae332d21df23a9a5e6b7ebe1f..fa2633017bf827f14df78ba4dad81035f32cd812 100644
--- a/test/porenetwork/1pnc/main.cc
+++ b/test/porenetwork/1pnc/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porenetwork/2p/main.cc b/test/porenetwork/2p/main.cc
index 48a2f139b16b379be5aafece7eb437fea205b8b1..fc98411d0c8d002314bb68829750cf03e92e9bdd 100644
--- a/test/porenetwork/2p/main.cc
+++ b/test/porenetwork/2p/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porenetwork/2p/static/main.cc b/test/porenetwork/2p/static/main.cc
index 326b6dbea341d17a1cf1e074c377eaf211325a82..c84aff6e01dfbe92e99fab87721608cc74f82e6e 100644
--- a/test/porenetwork/2p/static/main.cc
+++ b/test/porenetwork/2p/static/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/compressible/instationary/main.cc b/test/porousmediumflow/1p/compressible/instationary/main.cc
index 7c92b41642f47bf6455747101fe1a6fc38a4f0d6..71ccb9a6591b094abd3b3b94cd623a76dadd15dd 100644
--- a/test/porousmediumflow/1p/compressible/instationary/main.cc
+++ b/test/porousmediumflow/1p/compressible/instationary/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/compressible/instationary/main_experimental.cc b/test/porousmediumflow/1p/compressible/instationary/main_experimental.cc
index 5aa567e16d5a7b5cff52a31066f6b62930bc850d..5382477e4ab8ead2d020594d5085e1f476bd23ad 100644
--- a/test/porousmediumflow/1p/compressible/instationary/main_experimental.cc
+++ b/test/porousmediumflow/1p/compressible/instationary/main_experimental.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/compressible/stationary/main.cc b/test/porousmediumflow/1p/compressible/stationary/main.cc
index 13fbe548e02909fa7855b607d20cf07028b656af..9fcdcdc4a750088ecd80d2dc266dbc382b2f9ce7 100644
--- a/test/porousmediumflow/1p/compressible/stationary/main.cc
+++ b/test/porousmediumflow/1p/compressible/stationary/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/convergence/analyticsolution/main.cc b/test/porousmediumflow/1p/convergence/analyticsolution/main.cc
index b009540883b5cc3b10b56eabe6b4439b88d34044..9c8c2b45f72a87465323a9d6b64480ed5c7655bd 100644
--- a/test/porousmediumflow/1p/convergence/analyticsolution/main.cc
+++ b/test/porousmediumflow/1p/convergence/analyticsolution/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/convergence/discretesolution/main.cc b/test/porousmediumflow/1p/convergence/discretesolution/main.cc
index 22f47044ed328d8ea3b1326598eb0024c8046f2f..8ecd20b70dbfab15a33e0b00d794cba3c83b07ac 100644
--- a/test/porousmediumflow/1p/convergence/discretesolution/main.cc
+++ b/test/porousmediumflow/1p/convergence/discretesolution/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/fracture2d3d/main.cc b/test/porousmediumflow/1p/fracture2d3d/main.cc
index c9e5659eff081bb4821a2d6110205534edf82547..0b16e0e34c6561df5f2e15d7b4941c3247d8eebc 100644
--- a/test/porousmediumflow/1p/fracture2d3d/main.cc
+++ b/test/porousmediumflow/1p/fracture2d3d/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/incompressible/main.cc b/test/porousmediumflow/1p/incompressible/main.cc
index 1a77ac731066908c31648108d5ecf654b41ddc1e..cd7e53cc1f98080d96136af855f76a688f4eff5b 100644
--- a/test/porousmediumflow/1p/incompressible/main.cc
+++ b/test/porousmediumflow/1p/incompressible/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/isothermal/main.cc b/test/porousmediumflow/1p/isothermal/main.cc
index df0ee8d56ed1a77f82a47adf2bedc279496ce845..8c9f322fc02e8a2199f5fc2d3da0274402ef888e 100644
--- a/test/porousmediumflow/1p/isothermal/main.cc
+++ b/test/porousmediumflow/1p/isothermal/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/network1d3d/main.cc b/test/porousmediumflow/1p/network1d3d/main.cc
index 28996121a95cafc8eddee14500ac8ce5c4018411..d077b23098d0da62f59e7f66b89053fd6146fe6c 100644
--- a/test/porousmediumflow/1p/network1d3d/main.cc
+++ b/test/porousmediumflow/1p/network1d3d/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/nonisothermal/main.cc b/test/porousmediumflow/1p/nonisothermal/main.cc
index 24fac4921873798598f9ad8c52c413d4a1aef83b..7e9ab29e7071b88cab5f012ad408813b1507851a 100644
--- a/test/porousmediumflow/1p/nonisothermal/main.cc
+++ b/test/porousmediumflow/1p/nonisothermal/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/periodicbc/main.cc b/test/porousmediumflow/1p/periodicbc/main.cc
index 0d0a947e4cd2317b42beacbc1ce806195ada950a..213bf1d5a938945237c698e0dc405109874ad04f 100644
--- a/test/porousmediumflow/1p/periodicbc/main.cc
+++ b/test/porousmediumflow/1p/periodicbc/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/pointsources/timedependent/main.cc b/test/porousmediumflow/1p/pointsources/timedependent/main.cc
index 8a70f3f6a8f7c6a783b36bfbffe19c65c31b05d0..fc66de2efbf280c656679f0fc70887e5e3080cbd 100644
--- a/test/porousmediumflow/1p/pointsources/timedependent/main.cc
+++ b/test/porousmediumflow/1p/pointsources/timedependent/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/pointsources/timeindependent/main.cc b/test/porousmediumflow/1p/pointsources/timeindependent/main.cc
index 24600d09d3f8a64fd8717b5f17be5d155125920e..4ae864f33c774b20f315c8f37e2b054adf12eb49 100644
--- a/test/porousmediumflow/1p/pointsources/timeindependent/main.cc
+++ b/test/porousmediumflow/1p/pointsources/timeindependent/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1p/rootbenchmark/main.cc b/test/porousmediumflow/1p/rootbenchmark/main.cc
index 8abe93afc8023f02aab9a6a87d95516ab3690c58..3a07396a1fb9c2da7c6f1b059b170ea587cf8477 100644
--- a/test/porousmediumflow/1p/rootbenchmark/main.cc
+++ b/test/porousmediumflow/1p/rootbenchmark/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1pnc/1p2c/isothermal/main.cc b/test/porousmediumflow/1pnc/1p2c/isothermal/main.cc
index ff6d2dca8ae2f3f79dca8685f8c2e8a8a6d0d0da..2888ba96f9d4998726db2c8a9dcc87a66dcb38b8 100644
--- a/test/porousmediumflow/1pnc/1p2c/isothermal/main.cc
+++ b/test/porousmediumflow/1pnc/1p2c/isothermal/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1pnc/1p2c/isothermal/saltwaterintrusion/main.cc b/test/porousmediumflow/1pnc/1p2c/isothermal/saltwaterintrusion/main.cc
index 697e23a6d238419217c751519e42ec4c21ecc095..192d86d594233ae6e750f6673ddc26c6087fb038 100644
--- a/test/porousmediumflow/1pnc/1p2c/isothermal/saltwaterintrusion/main.cc
+++ b/test/porousmediumflow/1pnc/1p2c/isothermal/saltwaterintrusion/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1pnc/1p2c/nonisothermal/conduction/main.cc b/test/porousmediumflow/1pnc/1p2c/nonisothermal/conduction/main.cc
index 10ac6ad9e5d972273e62281aac1e3d7adce52b1c..a8d68a04dd0305d4aa2cb920f795584f8753d2dd 100644
--- a/test/porousmediumflow/1pnc/1p2c/nonisothermal/conduction/main.cc
+++ b/test/porousmediumflow/1pnc/1p2c/nonisothermal/conduction/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1pnc/1p2c/nonisothermal/convection/main.cc b/test/porousmediumflow/1pnc/1p2c/nonisothermal/convection/main.cc
index f030ec829ca6d10f2074755e0b3397f0dca303e3..73eec5a10f3ac14e768900800d510da10216f7b5 100644
--- a/test/porousmediumflow/1pnc/1p2c/nonisothermal/convection/main.cc
+++ b/test/porousmediumflow/1pnc/1p2c/nonisothermal/convection/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1pnc/1p2c/nonisothermal/transientbc/main.cc b/test/porousmediumflow/1pnc/1p2c/nonisothermal/transientbc/main.cc
index be977ca92abc4cbfa228cef01f4a2ac735b96304..4addfff99d42b8e2705f57c10a82c15c23769daa 100644
--- a/test/porousmediumflow/1pnc/1p2c/nonisothermal/transientbc/main.cc
+++ b/test/porousmediumflow/1pnc/1p2c/nonisothermal/transientbc/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1pnc/1p3c/main.cc b/test/porousmediumflow/1pnc/1p3c/main.cc
index c66a6dfea242295c52f37959b54811a24dde6e44..b31eaab7053a2f54cd611d27665c1d86c4296642 100644
--- a/test/porousmediumflow/1pnc/1p3c/main.cc
+++ b/test/porousmediumflow/1pnc/1p3c/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1pnc/dispersion/main.cc b/test/porousmediumflow/1pnc/dispersion/main.cc
index 263c66478e8d6248daaa5b36b8458b9521afc6c0..4aea1f9616601573cb9249e21304b67ce57431b1 100644
--- a/test/porousmediumflow/1pnc/dispersion/main.cc
+++ b/test/porousmediumflow/1pnc/dispersion/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1pnc/nonequilibrium/main.cc b/test/porousmediumflow/1pnc/nonequilibrium/main.cc
index c68950eed5437e4cd4b12dff1dcc4ae09407c28e..bb990b6f0f72224d26dc4aa06ed5d4bf95f89c9b 100644
--- a/test/porousmediumflow/1pnc/nonequilibrium/main.cc
+++ b/test/porousmediumflow/1pnc/nonequilibrium/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/1pncmin/nonisothermal/main.cc b/test/porousmediumflow/1pncmin/nonisothermal/main.cc
index a170c54fbff59a8cff38fc9a57240169309b0c61..87d6447d564eef511a91af285393893a67d34e98 100644
--- a/test/porousmediumflow/1pncmin/nonisothermal/main.cc
+++ b/test/porousmediumflow/1pncmin/nonisothermal/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p/adaptive/main.cc b/test/porousmediumflow/2p/adaptive/main.cc
index 582ac592b257fa1a780e87e92c87545b2d50a67a..629686a569cb3d544d16c46a0f617e4ac47320be 100644
--- a/test/porousmediumflow/2p/adaptive/main.cc
+++ b/test/porousmediumflow/2p/adaptive/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p/boxdfm/main.cc b/test/porousmediumflow/2p/boxdfm/main.cc
index 6a32123b0f57a5fb0cb5d3c72128769b78f9328e..43f2fb02a48a091ef4146213736073da2060f0e4 100644
--- a/test/porousmediumflow/2p/boxdfm/main.cc
+++ b/test/porousmediumflow/2p/boxdfm/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p/cornerpoint/main.cc b/test/porousmediumflow/2p/cornerpoint/main.cc
index 569d96467c8e1240f0acdcafc65575add7d25f0b..fd3e1b98419d6b022b7933523d8dfd74acda02df 100644
--- a/test/porousmediumflow/2p/cornerpoint/main.cc
+++ b/test/porousmediumflow/2p/cornerpoint/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p/fracture/main.cc b/test/porousmediumflow/2p/fracture/main.cc
index e86f55d43a776c4ac6b07da75be6b5b56b2a3c5a..b91e523f83184bdd316f2c7349afffd8240fa29e 100644
--- a/test/porousmediumflow/2p/fracture/main.cc
+++ b/test/porousmediumflow/2p/fracture/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p/incompressible/main.cc b/test/porousmediumflow/2p/incompressible/main.cc
index ff5790c34f708511a4b4de7f9bdca6486c02e852..afe9b9719b46b121a7a314ef4321c12b14e69377 100644
--- a/test/porousmediumflow/2p/incompressible/main.cc
+++ b/test/porousmediumflow/2p/incompressible/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p/nonisothermal/main.cc b/test/porousmediumflow/2p/nonisothermal/main.cc
index 02e37fd432e18c46ad66494ea6d8e820b662908e..023163af88a99a8b4d9e87746af6940d79e1071c 100644
--- a/test/porousmediumflow/2p/nonisothermal/main.cc
+++ b/test/porousmediumflow/2p/nonisothermal/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p/rotationsymmetry/main.cc b/test/porousmediumflow/2p/rotationsymmetry/main.cc
index b5ce6838a816c2e4410b688e53854d7e1eb6983a..937955679fd5d4cb3646343adb8853fa40b89e8a 100644
--- a/test/porousmediumflow/2p/rotationsymmetry/main.cc
+++ b/test/porousmediumflow/2p/rotationsymmetry/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p1c/main.cc b/test/porousmediumflow/2p1c/main.cc
index c47de38511b17bc5ff019617c13579f996dbd7c8..d1dcf6fa247fba4c2cab72782544f75cfbfab0f7 100644
--- a/test/porousmediumflow/2p1c/main.cc
+++ b/test/porousmediumflow/2p1c/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p2c/chemicalnonequilibrium/main.cc b/test/porousmediumflow/2p2c/chemicalnonequilibrium/main.cc
index 3f922025d33feabd2bd98ecf98efc4a4a4742715..61fe5f5bbb279deb6d4a4d9fbf3f52680b85c783 100644
--- a/test/porousmediumflow/2p2c/chemicalnonequilibrium/main.cc
+++ b/test/porousmediumflow/2p2c/chemicalnonequilibrium/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p2c/evaporation/main.cc b/test/porousmediumflow/2p2c/evaporation/main.cc
index c018c1b9b51cc1a23432c046775b9a96e5ab386c..7243889ebd026345997284449d552ca08cce9f1d 100644
--- a/test/porousmediumflow/2p2c/evaporation/main.cc
+++ b/test/porousmediumflow/2p2c/evaporation/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p2c/injection/main.cc b/test/porousmediumflow/2p2c/injection/main.cc
index 67f3870e64d87308364aba5ad45f1fd086378223..6e370e9ff98b2e4614d60e08915d3e4d996ba797 100644
--- a/test/porousmediumflow/2p2c/injection/main.cc
+++ b/test/porousmediumflow/2p2c/injection/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p2c/mpnccomparison/main.cc b/test/porousmediumflow/2p2c/mpnccomparison/main.cc
index 01045dbade396db35296f0e90162ff84e32f2e7c..9679ebca878d58277000f7aa407cefd04b1df06e 100644
--- a/test/porousmediumflow/2p2c/mpnccomparison/main.cc
+++ b/test/porousmediumflow/2p2c/mpnccomparison/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2p2c/waterair/main.cc b/test/porousmediumflow/2p2c/waterair/main.cc
index 3b1590da88d426d9411a48d3ae35ecdaaee2ffeb..23f72427281fc41c8cb2847fbfc2e47c8c07578b 100644
--- a/test/porousmediumflow/2p2c/waterair/main.cc
+++ b/test/porousmediumflow/2p2c/waterair/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2pnc/diffusion/main.cc b/test/porousmediumflow/2pnc/diffusion/main.cc
index 484210ce02a808610832b9edc9ee3f57c63269e4..7973f0232154f7619d18bd6a2648826c8b5a649a 100644
--- a/test/porousmediumflow/2pnc/diffusion/main.cc
+++ b/test/porousmediumflow/2pnc/diffusion/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2pnc/fuelcell/main.cc b/test/porousmediumflow/2pnc/fuelcell/main.cc
index 974777b5e7bc009cc8b5794811964942c57e56e7..ead15038544acef0a2c37b84ac5c8037794bc7cc 100644
--- a/test/porousmediumflow/2pnc/fuelcell/main.cc
+++ b/test/porousmediumflow/2pnc/fuelcell/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2pnc/surfactant/main.cc b/test/porousmediumflow/2pnc/surfactant/main.cc
index 7571069f60f6c92b3fedc01b685ba42ab8c59dff..80581ebc0ae09ef4b9f375960a0212cc3cea8f1e 100644
--- a/test/porousmediumflow/2pnc/surfactant/main.cc
+++ b/test/porousmediumflow/2pnc/surfactant/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2pncmin/isothermal/main.cc b/test/porousmediumflow/2pncmin/isothermal/main.cc
index a15d6a586f3529021e07952ef25be5a2967301e1..b7261d19fca07531f3ec610ce210499f1e5f62a6 100644
--- a/test/porousmediumflow/2pncmin/isothermal/main.cc
+++ b/test/porousmediumflow/2pncmin/isothermal/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/2pncmin/nonisothermal/main.cc b/test/porousmediumflow/2pncmin/nonisothermal/main.cc
index be9bb5bf9a105283da0171410c553c743581ba09..0904ea566e90fc5d8a2c7e0977c056e0deef61c8 100644
--- a/test/porousmediumflow/2pncmin/nonisothermal/main.cc
+++ b/test/porousmediumflow/2pncmin/nonisothermal/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/3p/conduction/main.cc b/test/porousmediumflow/3p/conduction/main.cc
index c5d5b562e8f751e56553a82222c08603d6fc2b3b..112016f0fca51473d6ef6ff11c707ad25757cefe 100644
--- a/test/porousmediumflow/3p/conduction/main.cc
+++ b/test/porousmediumflow/3p/conduction/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/3p/convection/main.cc b/test/porousmediumflow/3p/convection/main.cc
index 4f9ec2f8ac4fa356025aaa36d170dd87deed770f..a240ae3c053fdf6f1cc48c11510228d15cf50f0f 100644
--- a/test/porousmediumflow/3p/convection/main.cc
+++ b/test/porousmediumflow/3p/convection/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/3p/infiltration/main.cc b/test/porousmediumflow/3p/infiltration/main.cc
index e16a4c918a44af3cdd7b1b706ee911c004453d98..241230cd0bf6dd8e0489dbc25f83f65c18904137 100644
--- a/test/porousmediumflow/3p/infiltration/main.cc
+++ b/test/porousmediumflow/3p/infiltration/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/3p3c/columnxylol/main.cc b/test/porousmediumflow/3p3c/columnxylol/main.cc
index 62d48a17fc9379a040b584c92a4860874595f6b7..25137828407dcdcae2785e2a34d4aa536538d64c 100644
--- a/test/porousmediumflow/3p3c/columnxylol/main.cc
+++ b/test/porousmediumflow/3p3c/columnxylol/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/3p3c/infiltration/main.cc b/test/porousmediumflow/3p3c/infiltration/main.cc
index ea8bfe4ab461438416b5ad42e0f8088fa85aa61b..8102796b0495c29c7dd13b76c4e5a3022441334d 100644
--- a/test/porousmediumflow/3p3c/infiltration/main.cc
+++ b/test/porousmediumflow/3p3c/infiltration/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/3p3c/kuevette/main.cc b/test/porousmediumflow/3p3c/kuevette/main.cc
index 389544bc9c1496532ba95bd6dbb7ababf3eaeab6..617ea6e499c395d2b8fae4b9f0927c8329041c59 100644
--- a/test/porousmediumflow/3p3c/kuevette/main.cc
+++ b/test/porousmediumflow/3p3c/kuevette/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/3pwateroil/main.cc b/test/porousmediumflow/3pwateroil/main.cc
index 440758a57a326f2e253e9aeed55b57344d3f2dd1..887f48bf02497fd2c7e30e50b64d3cc6fbc57044 100644
--- a/test/porousmediumflow/3pwateroil/main.cc
+++ b/test/porousmediumflow/3pwateroil/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/co2/main.cc b/test/porousmediumflow/co2/main.cc
index 4e75642d591183b7f0beb1cdc51f793abbed5f7f..42c075d6598cbdfe429fb81e042a0901b7bf9884 100644
--- a/test/porousmediumflow/co2/main.cc
+++ b/test/porousmediumflow/co2/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/mpnc/2p2ccomparison/main.cc b/test/porousmediumflow/mpnc/2p2ccomparison/main.cc
index 5f28f88ac6ed3f882c87f570ebdbfda6bb28a28e..1b75c720961c0b78d0c5fe05bb5862a3ea507514 100644
--- a/test/porousmediumflow/mpnc/2p2ccomparison/main.cc
+++ b/test/porousmediumflow/mpnc/2p2ccomparison/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/mpnc/kinetic/main.cc b/test/porousmediumflow/mpnc/kinetic/main.cc
index 0776d60d7b690f21d65c9821b94675fafcb9cc44..d1bf7f11ae7fc1eef9e69615d3790f10d67dd751 100644
--- a/test/porousmediumflow/mpnc/kinetic/main.cc
+++ b/test/porousmediumflow/mpnc/kinetic/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/mpnc/obstacle/main.cc b/test/porousmediumflow/mpnc/obstacle/main.cc
index 5f28f88ac6ed3f882c87f570ebdbfda6bb28a28e..1b75c720961c0b78d0c5fe05bb5862a3ea507514 100644
--- a/test/porousmediumflow/mpnc/obstacle/main.cc
+++ b/test/porousmediumflow/mpnc/obstacle/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/mpnc/thermalnonequilibrium/main.cc b/test/porousmediumflow/mpnc/thermalnonequilibrium/main.cc
index 9b37025a83d83664cda735d661f99ba505f2c68d..ba00bda62242c337636ef6336b3b183e75be23de 100644
--- a/test/porousmediumflow/mpnc/thermalnonequilibrium/main.cc
+++ b/test/porousmediumflow/mpnc/thermalnonequilibrium/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/richards/analytical/main.cc b/test/porousmediumflow/richards/analytical/main.cc
index 3b37ebe8c48f69d41fd6eec7e531d4585e9ffd9a..48b47efa172235bdc7eccc1e0c063caa6404500d 100644
--- a/test/porousmediumflow/richards/analytical/main.cc
+++ b/test/porousmediumflow/richards/analytical/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/richards/annulus/main.cc b/test/porousmediumflow/richards/annulus/main.cc
index c6185c8da3b8c1bdb7aa95881ab122a2ffbf7dd4..f787b8b82e0ee20f01b95bdc6f8b5ec6d7e6d395 100644
--- a/test/porousmediumflow/richards/annulus/main.cc
+++ b/test/porousmediumflow/richards/annulus/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/richards/annulus/main_instationary.cc b/test/porousmediumflow/richards/annulus/main_instationary.cc
index 414044a5907208432f46c21a927432fb352e2447..7cb5f43248c235d925032803f6ac01200690c024 100644
--- a/test/porousmediumflow/richards/annulus/main_instationary.cc
+++ b/test/porousmediumflow/richards/annulus/main_instationary.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/richards/benchmarks/main.cc b/test/porousmediumflow/richards/benchmarks/main.cc
index fdce5413fee4dbd8c40f9f8c20bd9eb38bd1e478..5f69287f106b5ed89a519099e48e165b6b501dbb 100644
--- a/test/porousmediumflow/richards/benchmarks/main.cc
+++ b/test/porousmediumflow/richards/benchmarks/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/richards/lens/main.cc b/test/porousmediumflow/richards/lens/main.cc
index 4488b1b62e2e85610e54f9af14f67bb79e60ff0e..6ed263782e9c1ac8398f2559016e0a20fb2c75cd 100644
--- a/test/porousmediumflow/richards/lens/main.cc
+++ b/test/porousmediumflow/richards/lens/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/richards/nonisothermal/conduction/main.cc b/test/porousmediumflow/richards/nonisothermal/conduction/main.cc
index 56746ef1aca0092f4129f580e3a203b9fe2dc7be..cb3f79f17e85027f8b0b3f97e0f7e9668bc94479 100644
--- a/test/porousmediumflow/richards/nonisothermal/conduction/main.cc
+++ b/test/porousmediumflow/richards/nonisothermal/conduction/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/richards/nonisothermal/convection/main.cc b/test/porousmediumflow/richards/nonisothermal/convection/main.cc
index 56746ef1aca0092f4129f580e3a203b9fe2dc7be..cb3f79f17e85027f8b0b3f97e0f7e9668bc94479 100644
--- a/test/porousmediumflow/richards/nonisothermal/convection/main.cc
+++ b/test/porousmediumflow/richards/nonisothermal/convection/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/richards/nonisothermal/evaporation/main.cc b/test/porousmediumflow/richards/nonisothermal/evaporation/main.cc
index 87af886fc427311a87311bd329bd1b0336ef78f3..d2531d6ed86e2c4e3ce4035e48c496d776c5e58f 100644
--- a/test/porousmediumflow/richards/nonisothermal/evaporation/main.cc
+++ b/test/porousmediumflow/richards/nonisothermal/evaporation/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/richardsnc/main.cc b/test/porousmediumflow/richardsnc/main.cc
index 32019a8747f0fe8e3c685e708ea5a0545eadb240..63c8bdbb50a51d8822df52d2d6853f2ddd9ad069 100644
--- a/test/porousmediumflow/richardsnc/main.cc
+++ b/test/porousmediumflow/richardsnc/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/solidenergy/main.cc b/test/porousmediumflow/solidenergy/main.cc
index 4395c638dcc8cdf3863646137f0f2404df978bce..4e7f1f5f79acb124dcc77ad84e36dda657e80f4a 100644
--- a/test/porousmediumflow/solidenergy/main.cc
+++ b/test/porousmediumflow/solidenergy/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/tracer/2ptracer/main.cc b/test/porousmediumflow/tracer/2ptracer/main.cc
index d5364b6dbb12c8bc8ea0b05df651f4609695c698..954606b6c963471b1b5d84aa54531f93d78569f6 100644
--- a/test/porousmediumflow/tracer/2ptracer/main.cc
+++ b/test/porousmediumflow/tracer/2ptracer/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/tracer/constvel/main.cc b/test/porousmediumflow/tracer/constvel/main.cc
index d2c2b597c23a50076444a77ad9e2f1d1cef6c782..1d9eb7bceae35e4be9ed647b7e6e958d4921109e 100644
--- a/test/porousmediumflow/tracer/constvel/main.cc
+++ b/test/porousmediumflow/tracer/constvel/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *
diff --git a/test/porousmediumflow/tracer/multiphase/main.cc b/test/porousmediumflow/tracer/multiphase/main.cc
index 79f9d4866664afab5b4f5694a59a560a99469ed1..9557baa338eb26735dd40102c462ff57385bae4e 100644
--- a/test/porousmediumflow/tracer/multiphase/main.cc
+++ b/test/porousmediumflow/tracer/multiphase/main.cc
@@ -1,5 +1,9 @@
 // -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 // vi: set et ts=4 sw=4 sts=4:
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
 /*****************************************************************************
  *   See the file COPYING for full copying permissions.                      *
  *                                                                           *