diff --git a/include/nlohmann/detail/abi_macros.hpp b/include/nlohmann/detail/abi_macros.hpp
index d308637a5..53a19107a 100644
--- a/include/nlohmann/detail/abi_macros.hpp
+++ b/include/nlohmann/detail/abi_macros.hpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 #pragma once
 
 // This file contains all macro definitions affecting or depending on the ABI
diff --git a/include/nlohmann/detail/meta/std_fs.hpp b/include/nlohmann/detail/meta/std_fs.hpp
index edf7bdaff..49d6aeb3b 100644
--- a/include/nlohmann/detail/meta/std_fs.hpp
+++ b/include/nlohmann/detail/meta/std_fs.hpp
@@ -1,3 +1,11 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++
+// |  |  |__   |  |  | | | |  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/detail/macro_scope.hpp>
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 073c0ece6..d1d422ab5 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -46,6 +46,14 @@
 #include <utility>
 
 // #include <nlohmann/detail/abi_macros.hpp>
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 
 
 // This file contains all macro definitions affecting or depending on the ABI
@@ -4457,6 +4465,14 @@ template <class T> struct identity_tag {};
 NLOHMANN_JSON_NAMESPACE_END
 
 // #include <nlohmann/detail/meta/std_fs.hpp>
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++
+// |  |  |__   |  |  | | | |  version 3.10.5
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
 
 
 // #include <nlohmann/detail/macro_scope.hpp>
diff --git a/tests/src/make_test_data_available.hpp b/tests/src/make_test_data_available.hpp
index 740c83927..21619e319 100644
--- a/tests/src/make_test_data_available.hpp
+++ b/tests/src/make_test_data_available.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 <cstdio>   // fopen, fclose, FILE