diff --git a/Makefile b/Makefile
index 6b18ed82b..8a91c76ec 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ SED:=$(shell command -v gsed || which sed)
 SRCS=$(shell find include -type f | sort)
 
 # the list of sources in the tests folder
-TESTS_SRCS=$(shell find tests -type f \( -name '*.hpp' -o -name '*.cpp' -o -name '*.cu' \) -not -path 'tests/thirdparty/*' | sort)
+TESTS_SRCS=$(shell find tests -type f \( -name '*.hpp' -o -name '*.cpp' -o -name '*.cu' \) -not -path 'tests/thirdparty/*' -not -path 'tests/abi/include/nlohmann/json_v3_10_5.hpp' | sort)
 
 # the single header (amalgamated from the source files)
 AMALGAMATED_FILE=single_include/nlohmann/json.hpp
@@ -268,5 +268,5 @@ serve_header:
 
 reuse:
 	pipx run reuse addheader --recursive single_include include -tjson --license MIT --copyright "Niels Lohmann <https://nlohmann.me>" --year "2013-2022"
-	pipx run reuse addheader tests/benchmarks/src/benchmarks.cpp tests/src/*.cpp tests/src/*.hpp tests/abi/**/*.cpp tests/abi/**/*.hpp -tjson_support --license MIT --copyright "Niels Lohmann <https://nlohmann.me>" --year "2013-2022"
+	pipx run reuse addheader $(TESTS_SRCS) --style=c -tjson_support --license MIT --copyright "Niels Lohmann <https://nlohmann.me>" --year "2013-2022"
 	pipx run reuse lint
diff --git a/tests/abi/main.cpp b/tests/abi/main.cpp
index efb0ff5b0..fa7d2666b 100644
--- a/tests/abi/main.cpp
+++ b/tests/abi/main.cpp
@@ -1,31 +1,11 @@
-/*
-    __ _____ _____ _____
- __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.10.5
-|_____|_____|_____|_|___|  https://github.com/nlohmann/json
-
-Licensed under the MIT License <http://opensource.org/licenses/MIT>.
-SPDX-License-Identifier: MIT
-Copyright (c) 2013-2022 Niels Lohmann <http://nlohmann.me>.
-
-Permission is hereby  granted, free of charge, to any  person obtaining a copy
-of this software and associated  documentation files (the "Software"), to deal
-in the Software  without restriction, including without  limitation the rights
-to  use, copy,  modify, merge,  publish, distribute,  sublicense, and/or  sell
-copies  of  the Software,  and  to  permit persons  to  whom  the Software  is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
-IMPLIED,  INCLUDING BUT  NOT  LIMITED TO  THE  WARRANTIES OF  MERCHANTABILITY,
-FITNESS FOR  A PARTICULAR PURPOSE AND  NONINFRINGEMENT. IN NO EVENT  SHALL THE
-AUTHORS  OR COPYRIGHT  HOLDERS  BE  LIABLE FOR  ANY  CLAIM,  DAMAGES OR  OTHER
-LIABILITY, WHETHER IN AN ACTION OF  CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-*/
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// Copyright (c) 2013-2022 Niels Lohmann <http://nlohmann.me>.
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
 
 #define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
 #include "doctest_compatibility.h"
diff --git a/tests/cmake_add_subdirectory/project/main.cpp b/tests/cmake_add_subdirectory/project/main.cpp
index 9f71eb32a..8c2649556 100644
--- a/tests/cmake_add_subdirectory/project/main.cpp
+++ b/tests/cmake_add_subdirectory/project/main.cpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #include <nlohmann/json.hpp>
 
 int main(int argc, char** argv)
diff --git a/tests/cmake_fetch_content/project/main.cpp b/tests/cmake_fetch_content/project/main.cpp
index 9f71eb32a..8c2649556 100644
--- a/tests/cmake_fetch_content/project/main.cpp
+++ b/tests/cmake_fetch_content/project/main.cpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #include <nlohmann/json.hpp>
 
 int main(int argc, char** argv)
diff --git a/tests/cmake_fetch_content2/project/main.cpp b/tests/cmake_fetch_content2/project/main.cpp
index 9f71eb32a..8c2649556 100644
--- a/tests/cmake_fetch_content2/project/main.cpp
+++ b/tests/cmake_fetch_content2/project/main.cpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #include <nlohmann/json.hpp>
 
 int main(int argc, char** argv)
diff --git a/tests/cmake_import/project/main.cpp b/tests/cmake_import/project/main.cpp
index 9f71eb32a..8c2649556 100644
--- a/tests/cmake_import/project/main.cpp
+++ b/tests/cmake_import/project/main.cpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #include <nlohmann/json.hpp>
 
 int main(int argc, char** argv)
diff --git a/tests/cmake_import_minver/project/main.cpp b/tests/cmake_import_minver/project/main.cpp
index 9f71eb32a..8c2649556 100644
--- a/tests/cmake_import_minver/project/main.cpp
+++ b/tests/cmake_import_minver/project/main.cpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #include <nlohmann/json.hpp>
 
 int main(int argc, char** argv)
diff --git a/tests/cmake_target_include_directories/project/Bar.cpp b/tests/cmake_target_include_directories/project/Bar.cpp
index ed39e284c..565e6f142 100644
--- a/tests/cmake_target_include_directories/project/Bar.cpp
+++ b/tests/cmake_target_include_directories/project/Bar.cpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #include "Bar.hpp"
 
 class Bar;
diff --git a/tests/cmake_target_include_directories/project/Bar.hpp b/tests/cmake_target_include_directories/project/Bar.hpp
index 454ced3a3..f0934ba4a 100644
--- a/tests/cmake_target_include_directories/project/Bar.hpp
+++ b/tests/cmake_target_include_directories/project/Bar.hpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #include <nlohmann/json.hpp>
 #include "Foo.hpp"
 
diff --git a/tests/cmake_target_include_directories/project/Foo.cpp b/tests/cmake_target_include_directories/project/Foo.cpp
index 6a2ff91ac..35110719a 100644
--- a/tests/cmake_target_include_directories/project/Foo.cpp
+++ b/tests/cmake_target_include_directories/project/Foo.cpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #include "Foo.hpp"
 
 class Foo;
diff --git a/tests/cmake_target_include_directories/project/Foo.hpp b/tests/cmake_target_include_directories/project/Foo.hpp
index f97c68902..41769022a 100644
--- a/tests/cmake_target_include_directories/project/Foo.hpp
+++ b/tests/cmake_target_include_directories/project/Foo.hpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #pragma once
 #include <nlohmann/json.hpp>
 
diff --git a/tests/cmake_target_include_directories/project/main.cpp b/tests/cmake_target_include_directories/project/main.cpp
index 9f71eb32a..8c2649556 100644
--- a/tests/cmake_target_include_directories/project/main.cpp
+++ b/tests/cmake_target_include_directories/project/main.cpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #include <nlohmann/json.hpp>
 
 int main(int argc, char** argv)
diff --git a/tests/cuda_example/json_cuda.cu b/tests/cuda_example/json_cuda.cu
index d686cd0f8..bcf93ccce 100644
--- a/tests/cuda_example/json_cuda.cu
+++ b/tests/cuda_example/json_cuda.cu
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #include <nlohmann/json.hpp>
 
 int main()