diff --git a/tests/replication/tcp/streams/test_account_data.py b/tests/replication/tcp/streams/test_account_data.py
index 9d934a8dfe..6dea29ae15 100644
--- a/tests/replication/tcp/streams/test_account_data.py
+++ b/tests/replication/tcp/streams/test_account_data.py
@@ -1,6 +1,7 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2020 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/tests/replication/tcp/streams/test_partial_state.py b/tests/replication/tcp/streams/test_partial_state.py
index e3d4c01aae..abd4e0b8cd 100644
--- a/tests/replication/tcp/streams/test_partial_state.py
+++ b/tests/replication/tcp/streams/test_partial_state.py
@@ -1,6 +1,7 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2022 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/tests/replication/tcp/streams/test_to_device.py b/tests/replication/tcp/streams/test_to_device.py
index e9e9590396..cb07e93d6b 100644
--- a/tests/replication/tcp/streams/test_to_device.py
+++ b/tests/replication/tcp/streams/test_to_device.py
@@ -1,6 +1,7 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2023 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/tests/replication/tcp/streams/test_typing.py b/tests/replication/tcp/streams/test_typing.py
index 198045dd86..b1c2f5b03b 100644
--- a/tests/replication/tcp/streams/test_typing.py
+++ b/tests/replication/tcp/streams/test_typing.py
@@ -1,6 +1,7 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2020 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/tests/replication/tcp/test_commands.py b/tests/replication/tcp/test_commands.py
index 10efc00679..87a2365ae3 100644
--- a/tests/replication/tcp/test_commands.py
+++ b/tests/replication/tcp/test_commands.py
@@ -1,6 +1,7 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2020 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
diff --git a/tests/replication/tcp/test_handler.py b/tests/replication/tcp/test_handler.py
index ecdf8e6679..a8eb7fc523 100644
--- a/tests/replication/tcp/test_handler.py
+++ b/tests/replication/tcp/test_handler.py
@@ -1,6 +1,7 @@
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
+# Copyright 2022 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
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