diff --git a/bluemira/magnets/__init__.py b/bluemira/magnets/__init__.py
index 07c8df8f00..de7dd20f43 100644
--- a/bluemira/magnets/__init__.py
+++ b/bluemira/magnets/__init__.py
@@ -1,23 +1,8 @@
-# bluemira is an integrated inter-disciplinary design tool for future fusion
-# reactors. It incorporates several modules, some of which rely on other
-# codes, to carry out a range of typical conceptual fusion reactor design
-# activities.
+# SPDX-FileCopyrightText: 2021-present M. Coleman, J. Cook, F. Franza
+# SPDX-FileCopyrightText: 2021-present I.A. Maione, S. McIntosh
+# SPDX-FileCopyrightText: 2021-present J. Morris, D. Short
 #
-# Copyright (C) 2021-2023 M. Coleman, J. Cook, F. Franza, I.A. Maione, S. McIntosh,
-#                         J. Morris, D. Short
-#
-# bluemira is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# bluemira is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with bluemira; if not, see <https://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 """
 Magnets module for the bluemira code.
diff --git a/bluemira/magnets/solenoid_tools.py b/bluemira/magnets/solenoid_tools.py
index 563c208081..dca450b4eb 100644
--- a/bluemira/magnets/solenoid_tools.py
+++ b/bluemira/magnets/solenoid_tools.py
@@ -1,23 +1,8 @@
-# bluemira is an integrated inter-disciplinary design tool for future fusion
-# reactors. It incorporates several modules, some of which rely on other
-# codes, to carry out a range of typical conceptual fusion reactor design
-# activities.
+# SPDX-FileCopyrightText: 2021-present M. Coleman, J. Cook, F. Franza
+# SPDX-FileCopyrightText: 2021-present I.A. Maione, S. McIntosh
+# SPDX-FileCopyrightText: 2021-present J. Morris, D. Short
 #
-# Copyright (C) 2021-2023 M. Coleman, J. Cook, F. Franza, I.A. Maione, S. McIntosh,
-#                         J. Morris, D. Short
-#
-# bluemira is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# bluemira is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with bluemira; if not, see <https://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 """
 Tools for simple solenoid calculations.
diff --git a/examples/magnets/central_solenoid_example.ex.py b/examples/magnets/central_solenoid_example.ex.py
index 57605c8726..51c3318d4c 100644
--- a/examples/magnets/central_solenoid_example.ex.py
+++ b/examples/magnets/central_solenoid_example.ex.py
@@ -14,26 +14,11 @@
 # ---
 
 # %% tags=["remove-cell"]
-# bluemira is an integrated inter-disciplinary design tool for future fusion
-# reactors. It incorporates several modules, some of which rely on other
-# codes, to carry out a range of typical conceptual fusion reactor design
-# activities.
+# SPDX-FileCopyrightText: 2021-present M. Coleman, J. Cook, F. Franza
+# SPDX-FileCopyrightText: 2021-present I.A. Maione, S. McIntosh
+# SPDX-FileCopyrightText: 2021-present J. Morris, D. Short
 #
-# Copyright (C) 2021-2023 M. Coleman, J. Cook, F. Franza, I.A. Maione, S. McIntosh,
-#                         J. Morris, D. Short
-#
-# bluemira is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# bluemira is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with bluemira; if not, see <https://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 """
 An example central solenoid winding pack design
diff --git a/tests/magnets/__init__.py b/tests/magnets/__init__.py
index 0c5e05f2ed..a42e2bcb16 100644
--- a/tests/magnets/__init__.py
+++ b/tests/magnets/__init__.py
@@ -1,20 +1,5 @@
-# bluemira is an integrated inter-disciplinary design tool for future fusion
-# reactors. It incorporates several modules, some of which rely on other
-# codes, to carry out a range of typical conceptual fusion reactor design
-# activities.
+# SPDX-FileCopyrightText: 2021-present M. Coleman, J. Cook, F. Franza
+# SPDX-FileCopyrightText: 2021-present I.A. Maione, S. McIntosh
+# SPDX-FileCopyrightText: 2021-present J. Morris, D. Short
 #
-# Copyright (C) 2021-2023 M. Coleman, J. Cook, F. Franza, I.A. Maione, S. McIntosh,
-#                         J. Morris, D. Short
-#
-# bluemira is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# bluemira is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with bluemira; if not, see <https://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: LGPL-2.1-or-later
diff --git a/tests/magnets/test_solenoid_tools.py b/tests/magnets/test_solenoid_tools.py
index 3d2ae09b63..e6a7e955ab 100644
--- a/tests/magnets/test_solenoid_tools.py
+++ b/tests/magnets/test_solenoid_tools.py
@@ -1,24 +1,8 @@
-# bluemira is an integrated inter-disciplinary design tool for future fusion
-# reactors. It incorporates several modules, some of which rely on other
-# codes, to carry out a range of typical conceptual fusion reactor design
-# activities.
+# SPDX-FileCopyrightText: 2021-present M. Coleman, J. Cook, F. Franza
+# SPDX-FileCopyrightText: 2021-present I.A. Maione, S. McIntosh
+# SPDX-FileCopyrightText: 2021-present J. Morris, D. Short
 #
-# Copyright (C) 2021-2023 M. Coleman, J. Cook, F. Franza, I.A. Maione, S. McIntosh,
-#                         J. Morris, D. Short
-#
-# bluemira is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# bluemira is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with bluemira; if not, see <https://www.gnu.org/licenses/>.
-
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 import numpy as np
 import pytest
@@ -54,8 +38,8 @@ def test_radial_boundary_conditions(self):
 
 class TestCalculateBmax:
     @pytest.mark.parametrize(
-        "alpha,beta,k_expected",
-        [[1.375, 1.2, 1.12], [1.322, 1.5, 1.07], [1.287, 2.0, 1.03]],
+        ("alpha", "beta", "k_expected"),
+        [(1.375, 1.2, 1.12), (1.322, 1.5, 1.07), (1.287, 2.0, 1.03)],
     )
     def test_Bmax(self, alpha, beta, k_expected):
         """