diff --git a/src/py/flwr/__init__.py b/src/py/flwr/__init__.py
index cfe1fc3c006a..ccaf07c6012f 100644
--- a/src/py/flwr/__init__.py
+++ b/src/py/flwr/__init__.py
@@ -26,4 +26,4 @@
     "simulation",
 ]
 
-__version__ = _package_version
\ No newline at end of file
+__version__ = _package_version
diff --git a/src/py/flwr/__init___test.py b/src/py/flwr/__init___test.py
index 6e1d710d6e33..61785d093b2d 100644
--- a/src/py/flwr/__init___test.py
+++ b/src/py/flwr/__init___test.py
@@ -24,4 +24,4 @@ def test_version() -> None:
     from flwr import __version__  # pylint: disable=import-outside-toplevel
 
     # Assert
-    semver.VersionInfo.parse(__version__)
\ No newline at end of file
+    semver.VersionInfo.parse(__version__)
diff --git a/src/py/flwr/cli/__init__.py b/src/py/flwr/cli/__init__.py
index ce55f0dff98a..d4d3b8ac4d48 100644
--- a/src/py/flwr/cli/__init__.py
+++ b/src/py/flwr/cli/__init__.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Flower command line interface."""
\ No newline at end of file
+"""Flower command line interface."""
diff --git a/src/py/flwr/cli/app.py b/src/py/flwr/cli/app.py
index 97631de03592..477b990bf1da 100644
--- a/src/py/flwr/cli/app.py
+++ b/src/py/flwr/cli/app.py
@@ -38,4 +38,4 @@
 app.command()(install)
 
 if __name__ == "__main__":
-    app()
\ No newline at end of file
+    app()
diff --git a/src/py/flwr/cli/build.py b/src/py/flwr/cli/build.py
index 639d8767a703..2981eacf925d 100644
--- a/src/py/flwr/cli/build.py
+++ b/src/py/flwr/cli/build.py
@@ -135,4 +135,4 @@ def _load_gitignore(directory: Path) -> pathspec.PathSpec:
     if gitignore_path.exists():
         with open(gitignore_path, encoding="UTF-8") as file:
             patterns.extend(file.readlines())
-    return pathspec.PathSpec.from_lines("gitwildmatch", patterns)
\ No newline at end of file
+    return pathspec.PathSpec.from_lines("gitwildmatch", patterns)
diff --git a/src/py/flwr/cli/config_utils.py b/src/py/flwr/cli/config_utils.py
index 55d51b5832cc..d06a1d6dba96 100644
--- a/src/py/flwr/cli/config_utils.py
+++ b/src/py/flwr/cli/config_utils.py
@@ -177,4 +177,4 @@ def load_from_string(toml_content: str) -> Optional[Dict[str, Any]]:
         data = tomli.loads(toml_content)
         return data
     except tomli.TOMLDecodeError:
-        return None
\ No newline at end of file
+        return None
diff --git a/src/py/flwr/cli/config_utils_test.py b/src/py/flwr/cli/config_utils_test.py
index 4d84cf390b15..b24425cd08f4 100644
--- a/src/py/flwr/cli/config_utils_test.py
+++ b/src/py/flwr/cli/config_utils_test.py
@@ -335,4 +335,4 @@ def test_validate_pyproject_toml_fail() -> None:
     # Assert
     assert not is_valid
     assert len(errors) == 1
-    assert len(warnings) == 0
\ No newline at end of file
+    assert len(warnings) == 0
diff --git a/src/py/flwr/cli/example.py b/src/py/flwr/cli/example.py
index 0bd5422abfb1..4790e72d48bf 100644
--- a/src/py/flwr/cli/example.py
+++ b/src/py/flwr/cli/example.py
@@ -63,4 +63,4 @@ def example() -> None:
         subprocess.check_output(["mv", examples_dir, "."])
 
         print()
-        print(f"Example ready to use in {os.path.join(os.getcwd(), example_name)}")
\ No newline at end of file
+        print(f"Example ready to use in {os.path.join(os.getcwd(), example_name)}")
diff --git a/src/py/flwr/cli/install.py b/src/py/flwr/cli/install.py
index dc549f1dff73..de9227bee450 100644
--- a/src/py/flwr/cli/install.py
+++ b/src/py/flwr/cli/install.py
@@ -208,4 +208,4 @@ def _verify_hashes(list_content: str, tmpdir: Path) -> bool:
         file_path = tmpdir / rel_path
         if not file_path.exists() or get_sha256_hash(file_path) != hash_expected:
             return False
-    return True
\ No newline at end of file
+    return True
diff --git a/src/py/flwr/cli/new/__init__.py b/src/py/flwr/cli/new/__init__.py
index 32d8ce816fc5..a973f47021c3 100644
--- a/src/py/flwr/cli/new/__init__.py
+++ b/src/py/flwr/cli/new/__init__.py
@@ -18,4 +18,4 @@
 
 __all__ = [
     "new",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/cli/new/new.py b/src/py/flwr/cli/new/new.py
index 3ac78ccab53f..9bbc016de1a8 100644
--- a/src/py/flwr/cli/new/new.py
+++ b/src/py/flwr/cli/new/new.py
@@ -194,4 +194,4 @@ def new(
             fg=typer.colors.BRIGHT_CYAN,
             bold=True,
         )
-    )
\ No newline at end of file
+    )
diff --git a/src/py/flwr/cli/new/new_test.py b/src/py/flwr/cli/new/new_test.py
index 17fff7e2ebd6..33ad745efa93 100644
--- a/src/py/flwr/cli/new/new_test.py
+++ b/src/py/flwr/cli/new/new_test.py
@@ -137,4 +137,4 @@ def test_new_incorrect_name(tmp_path: str) -> None:
                 assert "Failed to read from stdin" in str(exc_info.value)
 
         finally:
-            os.chdir(origin)
\ No newline at end of file
+            os.chdir(origin)
diff --git a/src/py/flwr/cli/new/templates/__init__.py b/src/py/flwr/cli/new/templates/__init__.py
index aec0cea648f0..7a951c2da1a2 100644
--- a/src/py/flwr/cli/new/templates/__init__.py
+++ b/src/py/flwr/cli/new/templates/__init__.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Flower CLI `new` command templates."""
\ No newline at end of file
+"""Flower CLI `new` command templates."""
diff --git a/src/py/flwr/cli/new/templates/app/__init__.py b/src/py/flwr/cli/new/templates/app/__init__.py
index fe43d55c73ad..617628fc9138 100644
--- a/src/py/flwr/cli/new/templates/app/__init__.py
+++ b/src/py/flwr/cli/new/templates/app/__init__.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Flower CLI `new` command app templates."""
\ No newline at end of file
+"""Flower CLI `new` command app templates."""
diff --git a/src/py/flwr/cli/new/templates/app/code/__init__.py b/src/py/flwr/cli/new/templates/app/code/__init__.py
index 37d3c1172445..7f1a0e9f4fa2 100644
--- a/src/py/flwr/cli/new/templates/app/code/__init__.py
+++ b/src/py/flwr/cli/new/templates/app/code/__init__.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Flower CLI `new` command app / code templates."""
\ No newline at end of file
+"""Flower CLI `new` command app / code templates."""
diff --git a/src/py/flwr/cli/run/__init__.py b/src/py/flwr/cli/run/__init__.py
index 27a37ea99506..43523c215d3e 100644
--- a/src/py/flwr/cli/run/__init__.py
+++ b/src/py/flwr/cli/run/__init__.py
@@ -18,4 +18,4 @@
 
 __all__ = [
     "run",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/cli/run/run.py b/src/py/flwr/cli/run/run.py
index 79757f4076ac..7577d9efbd8c 100644
--- a/src/py/flwr/cli/run/run.py
+++ b/src/py/flwr/cli/run/run.py
@@ -118,4 +118,4 @@ def on_channel_state_change(channel_connectivity: str) -> None:
     stub = ExecStub(channel)
 
     req = StartRunRequest()
-    stub.StartRun(req)
\ No newline at end of file
+    stub.StartRun(req)
diff --git a/src/py/flwr/cli/utils.py b/src/py/flwr/cli/utils.py
index 045f039e2fbb..2f5a8831fa7c 100644
--- a/src/py/flwr/cli/utils.py
+++ b/src/py/flwr/cli/utils.py
@@ -135,4 +135,4 @@ def get_sha256_hash(file_path: Path) -> str:
             if not data:
                 break
             sha256.update(data)
-    return sha256.hexdigest()
\ No newline at end of file
+    return sha256.hexdigest()
diff --git a/src/py/flwr/client/__init__.py b/src/py/flwr/client/__init__.py
index 797a83765981..58fd94448586 100644
--- a/src/py/flwr/client/__init__.py
+++ b/src/py/flwr/client/__init__.py
@@ -34,4 +34,4 @@
     "run_supernode",
     "start_client",
     "start_numpy_client",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/client/app.py b/src/py/flwr/client/app.py
index 7c9a6bd29c4b..cdb7b25cbf6b 100644
--- a/src/py/flwr/client/app.py
+++ b/src/py/flwr/client/app.py
@@ -624,4 +624,4 @@ def signal_handler(sig, frame):  # type: ignore
             raise StopIteration from None
 
         signal.signal(signal.SIGINT, signal_handler)
-        signal.signal(signal.SIGTERM, signal_handler)
\ No newline at end of file
+        signal.signal(signal.SIGTERM, signal_handler)
diff --git a/src/py/flwr/client/app_test.py b/src/py/flwr/client/app_test.py
index 0fe75cf49a19..56d6308a0fe2 100644
--- a/src/py/flwr/client/app_test.py
+++ b/src/py/flwr/client/app_test.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -125,4 +125,4 @@ def test_start_numpy_client_transport_invalid() -> None:
         )
         raise AssertionError()  # Fail the test if no exception was raised
     except ValueError:
-        pass
\ No newline at end of file
+        pass
diff --git a/src/py/flwr/client/client.py b/src/py/flwr/client/client.py
index 9a6918431c76..23a3755f3efe 100644
--- a/src/py/flwr/client/client.py
+++ b/src/py/flwr/client/client.py
@@ -251,4 +251,4 @@ def maybe_call_evaluate(client: Client, evaluate_ins: EvaluateIns) -> EvaluateRe
         )
 
     # If the client implements `evaluate`, call it
-    return client.evaluate(evaluate_ins)
\ No newline at end of file
+    return client.evaluate(evaluate_ins)
diff --git a/src/py/flwr/client/client_app.py b/src/py/flwr/client/client_app.py
index 1458f119945b..82539834eaad 100644
--- a/src/py/flwr/client/client_app.py
+++ b/src/py/flwr/client/client_app.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -237,4 +237,4 @@ def _registration_error(fn_name: str) -> ValueError:
         >>>        content=message.content()
         >>>    )
         """,
-    )
\ No newline at end of file
+    )
diff --git a/src/py/flwr/client/client_test.py b/src/py/flwr/client/client_test.py
index f92bc6a07713..373c676e5edc 100644
--- a/src/py/flwr/client/client_test.py
+++ b/src/py/flwr/client/client_test.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -281,4 +281,4 @@ def test_maybe_call_evaluate_false() -> None:
     actual = maybe_call_evaluate(client, MagicMock())
 
     # Assert
-    assert actual.status.code == Code.EVALUATE_NOT_IMPLEMENTED
\ No newline at end of file
+    assert actual.status.code == Code.EVALUATE_NOT_IMPLEMENTED
diff --git a/src/py/flwr/client/dpfedavg_numpy_client.py b/src/py/flwr/client/dpfedavg_numpy_client.py
index 95ee6df72fbc..ab31a289d29b 100644
--- a/src/py/flwr/client/dpfedavg_numpy_client.py
+++ b/src/py/flwr/client/dpfedavg_numpy_client.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -184,4 +184,4 @@ def evaluate(
         extended format (int, float, float, Dict[str, Scalar]) have been
         deprecated and removed since Flower 0.19.
         """
-        return self.client.evaluate(parameters, config)
\ No newline at end of file
+        return self.client.evaluate(parameters, config)
diff --git a/src/py/flwr/client/grpc_adapter_client/__init__.py b/src/py/flwr/client/grpc_adapter_client/__init__.py
index bb134b63c2f8..5900e2dc2d06 100644
--- a/src/py/flwr/client/grpc_adapter_client/__init__.py
+++ b/src/py/flwr/client/grpc_adapter_client/__init__.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Client-side part of the GrpcAdapter transport layer."""
\ No newline at end of file
+"""Client-side part of the GrpcAdapter transport layer."""
diff --git a/src/py/flwr/client/grpc_adapter_client/connection.py b/src/py/flwr/client/grpc_adapter_client/connection.py
index fc9b58f0870d..e4e32b3accd0 100644
--- a/src/py/flwr/client/grpc_adapter_client/connection.py
+++ b/src/py/flwr/client/grpc_adapter_client/connection.py
@@ -91,4 +91,4 @@ def grpc_adapter(  # pylint: disable=R0913
         authentication_keys=None,  # Authentication is not supported
         adapter_cls=GrpcAdapter,
     ) as conn:
-        yield conn
\ No newline at end of file
+        yield conn
diff --git a/src/py/flwr/client/grpc_client/__init__.py b/src/py/flwr/client/grpc_client/__init__.py
index c4e7400831d0..9e987e86b254 100644
--- a/src/py/flwr/client/grpc_client/__init__.py
+++ b/src/py/flwr/client/grpc_client/__init__.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Client-side part of the gRPC transport layer."""
\ No newline at end of file
+"""Client-side part of the gRPC transport layer."""
diff --git a/src/py/flwr/client/grpc_client/connection.py b/src/py/flwr/client/grpc_client/connection.py
index cec7ccf5f5e8..8c049861c672 100644
--- a/src/py/flwr/client/grpc_client/connection.py
+++ b/src/py/flwr/client/grpc_client/connection.py
@@ -238,4 +238,4 @@ def send(message: Message) -> None:
     finally:
         # Make sure to have a final
         channel.close()
-        log(DEBUG, "gRPC channel closed")
\ No newline at end of file
+        log(DEBUG, "gRPC channel closed")
diff --git a/src/py/flwr/client/grpc_client/connection_test.py b/src/py/flwr/client/grpc_client/connection_test.py
index 14b7e717fafc..da7800b26639 100644
--- a/src/py/flwr/client/grpc_client/connection_test.py
+++ b/src/py/flwr/client/grpc_client/connection_test.py
@@ -167,4 +167,4 @@ def run_client() -> int:
         assert messages_received == EXPECTED_NUM_SERVER_MESSAGE
 
     # Teardown
-    server.stop(1)
\ No newline at end of file
+    server.stop(1)
diff --git a/src/py/flwr/client/grpc_rere_client/__init__.py b/src/py/flwr/client/grpc_rere_client/__init__.py
index fe9580e6823b..93903e725776 100644
--- a/src/py/flwr/client/grpc_rere_client/__init__.py
+++ b/src/py/flwr/client/grpc_rere_client/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Client-side part of the gRPC request-response transport layer."""
\ No newline at end of file
+"""Client-side part of the gRPC request-response transport layer."""
diff --git a/src/py/flwr/client/grpc_rere_client/client_interceptor.py b/src/py/flwr/client/grpc_rere_client/client_interceptor.py
index e5d4b6715546..d2dded8a73d9 100644
--- a/src/py/flwr/client/grpc_rere_client/client_interceptor.py
+++ b/src/py/flwr/client/grpc_rere_client/client_interceptor.py
@@ -155,4 +155,4 @@ def intercept_unary_unary(
             self.shared_secret = generate_shared_key(
                 self.private_key, self.server_public_key
             )
-        return response
\ No newline at end of file
+        return response
diff --git a/src/py/flwr/client/grpc_rere_client/client_interceptor_test.py b/src/py/flwr/client/grpc_rere_client/client_interceptor_test.py
index 441b82dd7b0f..cc35ffef46db 100644
--- a/src/py/flwr/client/grpc_rere_client/client_interceptor_test.py
+++ b/src/py/flwr/client/grpc_rere_client/client_interceptor_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -372,4 +372,4 @@ def test_client_auth_get_run(self) -> None:
 
 
 if __name__ == "__main__":
-    unittest.main(verbosity=2)
\ No newline at end of file
+    unittest.main(verbosity=2)
diff --git a/src/py/flwr/client/grpc_rere_client/connection.py b/src/py/flwr/client/grpc_rere_client/connection.py
index 474f89c8ee6d..b1c268d51d55 100644
--- a/src/py/flwr/client/grpc_rere_client/connection.py
+++ b/src/py/flwr/client/grpc_rere_client/connection.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -281,4 +281,4 @@ def get_run(run_id: int) -> Tuple[str, str]:
         # Yield methods
         yield (receive, send, create_node, delete_node, get_run)
     except Exception as exc:  # pylint: disable=broad-except
-        log(ERROR, exc)
\ No newline at end of file
+        log(ERROR, exc)
diff --git a/src/py/flwr/client/grpc_rere_client/grpc_adapter.py b/src/py/flwr/client/grpc_rere_client/grpc_adapter.py
index bc781c58c57a..77c3d601020d 100644
--- a/src/py/flwr/client/grpc_rere_client/grpc_adapter.py
+++ b/src/py/flwr/client/grpc_rere_client/grpc_adapter.py
@@ -130,4 +130,4 @@ def GetRun(  # pylint: disable=C0103
         self, request: GetRunRequest, **kwargs: Any
     ) -> GetRunResponse:
         """."""
-        return self._send_and_receive(request, GetRunResponse, **kwargs)
\ No newline at end of file
+        return self._send_and_receive(request, GetRunResponse, **kwargs)
diff --git a/src/py/flwr/client/grpc_rere_client/grpc_adapter_test.py b/src/py/flwr/client/grpc_rere_client/grpc_adapter_test.py
index 131f8a91c7b5..e62111e084bc 100644
--- a/src/py/flwr/client/grpc_rere_client/grpc_adapter_test.py
+++ b/src/py/flwr/client/grpc_rere_client/grpc_adapter_test.py
@@ -35,4 +35,4 @@ def test_grpc_adapter_methods() -> None:
     }
 
     # Assert
-    assert expected_methods.issubset(methods)
\ No newline at end of file
+    assert expected_methods.issubset(methods)
diff --git a/src/py/flwr/client/heartbeat.py b/src/py/flwr/client/heartbeat.py
index 39d67693a2ad..b68e6163cc01 100644
--- a/src/py/flwr/client/heartbeat.py
+++ b/src/py/flwr/client/heartbeat.py
@@ -71,4 +71,4 @@ def start_ping_loop(
     )
     thread.start()
 
-    return thread
\ No newline at end of file
+    return thread
diff --git a/src/py/flwr/client/heartbeat_test.py b/src/py/flwr/client/heartbeat_test.py
index 19d517d34ccb..286429e075b1 100644
--- a/src/py/flwr/client/heartbeat_test.py
+++ b/src/py/flwr/client/heartbeat_test.py
@@ -56,4 +56,4 @@ def test_ping_loop_with_failures_terminates(self) -> None:
 
         # Assert
         self.assertTrue(ping_fn.called)
-        self.assertFalse(thread.is_alive())
\ No newline at end of file
+        self.assertFalse(thread.is_alive())
diff --git a/src/py/flwr/client/message_handler/__init__.py b/src/py/flwr/client/message_handler/__init__.py
index 07b452d420ab..653563963de5 100644
--- a/src/py/flwr/client/message_handler/__init__.py
+++ b/src/py/flwr/client/message_handler/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Client-side message handling."""
\ No newline at end of file
+"""Client-side message handling."""
diff --git a/src/py/flwr/client/message_handler/message_handler.py b/src/py/flwr/client/message_handler/message_handler.py
index 7cdf6cc64b55..e5acbe0cc9d0 100644
--- a/src/py/flwr/client/message_handler/message_handler.py
+++ b/src/py/flwr/client/message_handler/message_handler.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -175,4 +175,4 @@ def validate_out_message(out_message: Message, in_message_metadata: Metadata) ->
         and out_meta.created_at > in_meta.created_at
     ):
         return True
-    return False
\ No newline at end of file
+    return False
diff --git a/src/py/flwr/client/message_handler/message_handler_test.py b/src/py/flwr/client/message_handler/message_handler_test.py
index 91d54c9d715a..8a2db1804e4a 100644
--- a/src/py/flwr/client/message_handler/message_handler_test.py
+++ b/src/py/flwr/client/message_handler/message_handler_test.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -319,4 +319,4 @@ def test_invalid_message_run_id(self) -> None:
         # Assert
         for invalid_metadata in invalid_metadata_list:
             msg.__dict__["_metadata"] = invalid_metadata
-            self.assertFalse(validate_out_message(msg, self.in_metadata))
\ No newline at end of file
+            self.assertFalse(validate_out_message(msg, self.in_metadata))
diff --git a/src/py/flwr/client/message_handler/task_handler.py b/src/py/flwr/client/message_handler/task_handler.py
index 816c2b074624..7f515a30fe5a 100644
--- a/src/py/flwr/client/message_handler/task_handler.py
+++ b/src/py/flwr/client/message_handler/task_handler.py
@@ -51,4 +51,4 @@ def get_task_ins(
     # Only evaluate the first message
     task_ins: TaskIns = pull_task_ins_response.task_ins_list[0]
 
-    return task_ins
\ No newline at end of file
+    return task_ins
diff --git a/src/py/flwr/client/message_handler/task_handler_test.py b/src/py/flwr/client/message_handler/task_handler_test.py
index 6f156133e2c7..c8b9e14737ff 100644
--- a/src/py/flwr/client/message_handler/task_handler_test.py
+++ b/src/py/flwr/client/message_handler/task_handler_test.py
@@ -64,4 +64,4 @@ def test_get_task_ins_multiple_ins() -> None:
         reconnect=None, task_ins_list=[expected_task_ins, TaskIns(), TaskIns()]
     )
     actual_task_ins = get_task_ins(res)
-    assert actual_task_ins == expected_task_ins
\ No newline at end of file
+    assert actual_task_ins == expected_task_ins
diff --git a/src/py/flwr/client/mod/__init__.py b/src/py/flwr/client/mod/__init__.py
index e039f134c0a8..0b4cf6488421 100644
--- a/src/py/flwr/client/mod/__init__.py
+++ b/src/py/flwr/client/mod/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -30,4 +30,4 @@
     "parameters_size_mod",
     "secagg_mod",
     "secaggplus_mod",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/client/mod/centraldp_mods.py b/src/py/flwr/client/mod/centraldp_mods.py
index f2b6288efd3e..e6276ccf2245 100644
--- a/src/py/flwr/client/mod/centraldp_mods.py
+++ b/src/py/flwr/client/mod/centraldp_mods.py
@@ -156,4 +156,4 @@ def adaptiveclipping_mod(
 
     fit_res.metrics[KEY_NORM_BIT] = norm_bit
     out_msg.content = compat.fitres_to_recordset(fit_res, keep_input=True)
-    return out_msg
\ No newline at end of file
+    return out_msg
diff --git a/src/py/flwr/client/mod/comms_mods.py b/src/py/flwr/client/mod/comms_mods.py
index e7a3cd4abdf6..058fd6a70001 100644
--- a/src/py/flwr/client/mod/comms_mods.py
+++ b/src/py/flwr/client/mod/comms_mods.py
@@ -76,4 +76,4 @@ def parameters_size_mod(
 
     log(INFO, "Total parameters transmitted: %i bytes", parameters_size_in_bytes)
 
-    return call_next(msg, ctxt)
\ No newline at end of file
+    return call_next(msg, ctxt)
diff --git a/src/py/flwr/client/mod/localdp_mod.py b/src/py/flwr/client/mod/localdp_mod.py
index 611f3a12cf0a..fe369ad1c7e6 100644
--- a/src/py/flwr/client/mod/localdp_mod.py
+++ b/src/py/flwr/client/mod/localdp_mod.py
@@ -150,4 +150,4 @@ def __call__(
         )
 
         out_msg.content = compat.fitres_to_recordset(fit_res, keep_input=True)
-        return out_msg
\ No newline at end of file
+        return out_msg
diff --git a/src/py/flwr/client/mod/secure_aggregation/__init__.py b/src/py/flwr/client/mod/secure_aggregation/__init__.py
index 77a4705ad7b9..8892d8c03935 100644
--- a/src/py/flwr/client/mod/secure_aggregation/__init__.py
+++ b/src/py/flwr/client/mod/secure_aggregation/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -21,4 +21,4 @@
 __all__ = [
     "secagg_mod",
     "secaggplus_mod",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/client/mod/secure_aggregation/secagg_mod.py b/src/py/flwr/client/mod/secure_aggregation/secagg_mod.py
index 4fc3acb6be4f..d87af59a4e6e 100644
--- a/src/py/flwr/client/mod/secure_aggregation/secagg_mod.py
+++ b/src/py/flwr/client/mod/secure_aggregation/secagg_mod.py
@@ -27,4 +27,4 @@ def secagg_mod(
     call_next: ClientAppCallable,
 ) -> Message:
     """Handle incoming message and return results, following the SecAgg protocol."""
-    return secaggplus_mod(msg, ctxt, call_next)
\ No newline at end of file
+    return secaggplus_mod(msg, ctxt, call_next)
diff --git a/src/py/flwr/client/mod/secure_aggregation/secaggplus_mod.py b/src/py/flwr/client/mod/secure_aggregation/secaggplus_mod.py
index 39d7c39bf4b6..5b196ad84321 100644
--- a/src/py/flwr/client/mod/secure_aggregation/secaggplus_mod.py
+++ b/src/py/flwr/client/mod/secure_aggregation/secaggplus_mod.py
@@ -515,4 +515,4 @@ def _unmask(
     shares += [state.sk1_share_dict[nid] for nid in dead_nids]
 
     log(DEBUG, "Node %d: stage 3 completes. uploading key shares...", state.nid)
-    return {Key.NODE_ID_LIST: all_nids, Key.SHARE_LIST: shares}
\ No newline at end of file
+    return {Key.NODE_ID_LIST: all_nids, Key.SHARE_LIST: shares}
diff --git a/src/py/flwr/client/mod/secure_aggregation/secaggplus_mod_test.py b/src/py/flwr/client/mod/secure_aggregation/secaggplus_mod_test.py
index a7a2e3beb95e..36844a2983a1 100644
--- a/src/py/flwr/client/mod/secure_aggregation/secaggplus_mod_test.py
+++ b/src/py/flwr/client/mod/secure_aggregation/secaggplus_mod_test.py
@@ -320,4 +320,4 @@ def test_stage_unmask_check(self) -> None:
 
             set_stage(Stage.COLLECT_MASKED_VECTORS)
             with self.assertRaises(TypeError):
-                handler(invalid_configs)
\ No newline at end of file
+                handler(invalid_configs)
diff --git a/src/py/flwr/client/mod/utils.py b/src/py/flwr/client/mod/utils.py
index 3dac3b6f7aee..4c3c32944f01 100644
--- a/src/py/flwr/client/mod/utils.py
+++ b/src/py/flwr/client/mod/utils.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -33,4 +33,4 @@ def new_ffn(message: Message, context: Context) -> Message:
     for mod in reversed(mods):
         ffn = wrap_ffn(ffn, mod)
 
-    return ffn
\ No newline at end of file
+    return ffn
diff --git a/src/py/flwr/client/mod/utils_test.py b/src/py/flwr/client/mod/utils_test.py
index 23d8d6e184f3..4676a2c02c4b 100644
--- a/src/py/flwr/client/mod/utils_test.py
+++ b/src/py/flwr/client/mod/utils_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -152,4 +152,4 @@ def filter_mod(
         self.assertEqual(footprint, ["filter"])
         # pylint: disable-next=no-member
         self.assertEqual(list(message.content.configs_records.keys())[0], "filter")
-        self.assertEqual(list(out_message.content.configs_records.keys())[0], "filter")
\ No newline at end of file
+        self.assertEqual(list(out_message.content.configs_records.keys())[0], "filter")
diff --git a/src/py/flwr/client/node_state.py b/src/py/flwr/client/node_state.py
index 7a0c0360cbf7..71681b783419 100644
--- a/src/py/flwr/client/node_state.py
+++ b/src/py/flwr/client/node_state.py
@@ -45,4 +45,4 @@ def retrieve_context(self, run_id: int) -> Context:
 
     def update_context(self, run_id: int, context: Context) -> None:
         """Update run context."""
-        self.run_contexts[run_id] = context
\ No newline at end of file
+        self.run_contexts[run_id] = context
diff --git a/src/py/flwr/client/node_state_tests.py b/src/py/flwr/client/node_state_tests.py
index 6160cdba748f..193f52661579 100644
--- a/src/py/flwr/client/node_state_tests.py
+++ b/src/py/flwr/client/node_state_tests.py
@@ -62,4 +62,4 @@ def test_multirun_in_node_state() -> None:
     for run_id, context in node_state.run_contexts.items():
         assert (
             context.state.configs_records["counter"]["count"] == expected_values[run_id]
-        )
\ No newline at end of file
+        )
diff --git a/src/py/flwr/client/numpy_client.py b/src/py/flwr/client/numpy_client.py
index 2f27423ae5c5..0247958d88a9 100644
--- a/src/py/flwr/client/numpy_client.py
+++ b/src/py/flwr/client/numpy_client.py
@@ -313,4 +313,4 @@ def _wrap_numpy_client(client: NumPyClient) -> Client:
     wrapper_class = type("NumPyClientWrapper", (Client,), member_dict)
 
     # Create and return an instance of the newly created class
-    return wrapper_class(numpy_client=client)  # type: ignore
\ No newline at end of file
+    return wrapper_class(numpy_client=client)  # type: ignore
diff --git a/src/py/flwr/client/numpy_client_test.py b/src/py/flwr/client/numpy_client_test.py
index 4f5f9aab6ddb..526098798e45 100644
--- a/src/py/flwr/client/numpy_client_test.py
+++ b/src/py/flwr/client/numpy_client_test.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -157,4 +157,4 @@ def test_has_evaluate_false() -> None:
     actual = has_evaluate(client=client)
 
     # Assert
-    assert actual == expected
\ No newline at end of file
+    assert actual == expected
diff --git a/src/py/flwr/client/rest_client/__init__.py b/src/py/flwr/client/rest_client/__init__.py
index c9f7ae1eb1a8..c3485483ad35 100644
--- a/src/py/flwr/client/rest_client/__init__.py
+++ b/src/py/flwr/client/rest_client/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Client-side part of the REST transport layer."""
\ No newline at end of file
+"""Client-side part of the REST transport layer."""
diff --git a/src/py/flwr/client/rest_client/connection.py b/src/py/flwr/client/rest_client/connection.py
index eddecf9810ff..5f5e153f9d8d 100644
--- a/src/py/flwr/client/rest_client/connection.py
+++ b/src/py/flwr/client/rest_client/connection.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -359,4 +359,4 @@ def get_run(run_id: int) -> Tuple[str, str]:
         # Yield methods
         yield (receive, send, create_node, delete_node, get_run)
     except Exception as exc:  # pylint: disable=broad-except
-        log(ERROR, exc)
\ No newline at end of file
+        log(ERROR, exc)
diff --git a/src/py/flwr/client/supernode/__init__.py b/src/py/flwr/client/supernode/__init__.py
index cf895d36ce70..bc505f693875 100644
--- a/src/py/flwr/client/supernode/__init__.py
+++ b/src/py/flwr/client/supernode/__init__.py
@@ -21,4 +21,4 @@
 __all__ = [
     "run_client_app",
     "run_supernode",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/client/supernode/app.py b/src/py/flwr/client/supernode/app.py
index 0b7da7986a26..362b09c5d5b5 100644
--- a/src/py/flwr/client/supernode/app.py
+++ b/src/py/flwr/client/supernode/app.py
@@ -397,4 +397,4 @@ def _try_setup_client_authentication(
     return (
         ssh_private_key,
         ssh_public_key,
-    )
\ No newline at end of file
+    )
diff --git a/src/py/flwr/client/typing.py b/src/py/flwr/client/typing.py
index 00c2ba1ca81e..956ac7a15c05 100644
--- a/src/py/flwr/client/typing.py
+++ b/src/py/flwr/client/typing.py
@@ -25,4 +25,4 @@
 ClientFn = Callable[[str], Client]
 
 ClientAppCallable = Callable[[Message, Context], Message]
-Mod = Callable[[Message, Context, ClientAppCallable], Message]
\ No newline at end of file
+Mod = Callable[[Message, Context, ClientAppCallable], Message]
diff --git a/src/py/flwr/common/__init__.py b/src/py/flwr/common/__init__.py
index 0534ea32862d..bbdf48425e0a 100644
--- a/src/py/flwr/common/__init__.py
+++ b/src/py/flwr/common/__init__.py
@@ -107,4 +107,4 @@
     "ndarrays_to_parameters",
     "now",
     "parameters_to_ndarrays",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/common/address.py b/src/py/flwr/common/address.py
index fbff6bb2b2fa..71b6d684597f 100644
--- a/src/py/flwr/common/address.py
+++ b/src/py/flwr/common/address.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -56,4 +56,4 @@ def parse_address(address: str) -> Optional[Tuple[str, int, Optional[bool]]]:
         return host, port, version
 
     except ValueError:
-        return None
\ No newline at end of file
+        return None
diff --git a/src/py/flwr/common/address_test.py b/src/py/flwr/common/address_test.py
index 5c137e538d9e..420b89871d69 100644
--- a/src/py/flwr/common/address_test.py
+++ b/src/py/flwr/common/address_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -139,4 +139,4 @@ def test_domain_incorrect() -> None:
         actual = parse_address(address)
 
         # Assert
-        assert actual is None
\ No newline at end of file
+        assert actual is None
diff --git a/src/py/flwr/common/config.py b/src/py/flwr/common/config.py
index 39b000cf57e1..95bf8ce31c45 100644
--- a/src/py/flwr/common/config.py
+++ b/src/py/flwr/common/config.py
@@ -68,4 +68,4 @@ def get_project_config(project_dir: Union[str, Path]) -> Dict[str, Any]:
             f"Invalid {FAB_CONFIG_FILE}:\n{error_msg}",
         )
 
-    return config
\ No newline at end of file
+    return config
diff --git a/src/py/flwr/common/constant.py b/src/py/flwr/common/constant.py
index 8438915c323b..ac35549d2051 100644
--- a/src/py/flwr/common/constant.py
+++ b/src/py/flwr/common/constant.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -98,4 +98,4 @@ class ErrorCode:
 
     def __new__(cls) -> ErrorCode:
         """Prevent instantiation."""
-        raise TypeError(f"{cls.__name__} cannot be instantiated.")
\ No newline at end of file
+        raise TypeError(f"{cls.__name__} cannot be instantiated.")
diff --git a/src/py/flwr/common/context.py b/src/py/flwr/common/context.py
index 350ac4d164b6..b6349307d150 100644
--- a/src/py/flwr/common/context.py
+++ b/src/py/flwr/common/context.py
@@ -35,4 +35,4 @@ class Context:
         multiple rounds)
     """
 
-    state: RecordSet
\ No newline at end of file
+    state: RecordSet
diff --git a/src/py/flwr/common/date.py b/src/py/flwr/common/date.py
index d9d80d30b6b1..f47ad5470106 100644
--- a/src/py/flwr/common/date.py
+++ b/src/py/flwr/common/date.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -20,4 +20,4 @@
 
 def now() -> datetime:
     """Construct a datetime from time.time() with time zone set to UTC."""
-    return datetime.now(tz=timezone.utc)
\ No newline at end of file
+    return datetime.now(tz=timezone.utc)
diff --git a/src/py/flwr/common/differential_privacy.py b/src/py/flwr/common/differential_privacy.py
index 29d92f6736aa..85dc198ef8a0 100644
--- a/src/py/flwr/common/differential_privacy.py
+++ b/src/py/flwr/common/differential_privacy.py
@@ -173,4 +173,4 @@ def add_localdp_gaussian_noise_to_params(
         model_params_ndarrays,
         sensitivity * np.sqrt(2 * np.log(1.25 / delta)) / epsilon,
     )
-    return ndarrays_to_parameters(model_params_ndarrays)
\ No newline at end of file
+    return ndarrays_to_parameters(model_params_ndarrays)
diff --git a/src/py/flwr/common/differential_privacy_constants.py b/src/py/flwr/common/differential_privacy_constants.py
index 760018c64fd2..415759dfdf0b 100644
--- a/src/py/flwr/common/differential_privacy_constants.py
+++ b/src/py/flwr/common/differential_privacy_constants.py
@@ -22,4 +22,4 @@
     " differs from the number of sampled clients (%s)."
     " This could impact the differential privacy guarantees,"
     " potentially leading to privacy leakage or inadequate noise calibration."
-)
\ No newline at end of file
+)
diff --git a/src/py/flwr/common/differential_privacy_test.py b/src/py/flwr/common/differential_privacy_test.py
index 29a6f325a3ba..ea2e193df2f3 100644
--- a/src/py/flwr/common/differential_privacy_test.py
+++ b/src/py/flwr/common/differential_privacy_test.py
@@ -206,4 +206,4 @@ def test_compute_adaptive_noise_params() -> None:
     temp_value = (noise_multiplier ** (-2) - (2 * clipped_count_stddev) ** (-2)) ** -0.5
 
     # Assert
-    assert np.isclose(result[1], temp_value, rtol=1e-6)
\ No newline at end of file
+    assert np.isclose(result[1], temp_value, rtol=1e-6)
diff --git a/src/py/flwr/common/dp.py b/src/py/flwr/common/dp.py
index cdf0e2b00830..83a72b8ce749 100644
--- a/src/py/flwr/common/dp.py
+++ b/src/py/flwr/common/dp.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -47,4 +47,4 @@ def clip_by_l2(update: NDArrays, threshold: float) -> Tuple[NDArrays, bool]:
     update_norm = _get_update_norm(update)
     scaling_factor = min(1, threshold / update_norm)
     update_clipped: NDArrays = [layer * scaling_factor for layer in update]
-    return update_clipped, (scaling_factor < 1)
\ No newline at end of file
+    return update_clipped, (scaling_factor < 1)
diff --git a/src/py/flwr/common/exit_handlers.py b/src/py/flwr/common/exit_handlers.py
index 2def2b7c38db..30750c28a450 100644
--- a/src/py/flwr/common/exit_handlers.py
+++ b/src/py/flwr/common/exit_handlers.py
@@ -84,4 +84,4 @@ def graceful_exit_handler(  # type: ignore
     default_handlers[SIGTERM] = signal(  # type: ignore
         SIGTERM,
         graceful_exit_handler,  # type: ignore
-    )
\ No newline at end of file
+    )
diff --git a/src/py/flwr/common/grpc.py b/src/py/flwr/common/grpc.py
index 01321d60284d..ead0329ca79c 100644
--- a/src/py/flwr/common/grpc.py
+++ b/src/py/flwr/common/grpc.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -61,4 +61,4 @@ def create_channel(
     if interceptors is not None:
         channel = grpc.intercept_channel(channel, interceptors)
 
-    return channel
\ No newline at end of file
+    return channel
diff --git a/src/py/flwr/common/logger.py b/src/py/flwr/common/logger.py
index 9516d3860cfd..7225b0663ae7 100644
--- a/src/py/flwr/common/logger.py
+++ b/src/py/flwr/common/logger.py
@@ -220,4 +220,4 @@ def set_logger_propagation(
     child_logger.propagate = value
     if not child_logger.propagate:
         child_logger.log(logging.DEBUG, "Logger propagate set to False")
-    return child_logger
\ No newline at end of file
+    return child_logger
diff --git a/src/py/flwr/common/message.py b/src/py/flwr/common/message.py
index c958c01673b9..7f7a0e4dd995 100644
--- a/src/py/flwr/common/message.py
+++ b/src/py/flwr/common/message.py
@@ -399,4 +399,4 @@ def _create_reply_metadata(msg: Message, ttl: float) -> Metadata:
         ttl=ttl,
         message_type=msg.metadata.message_type,
         partition_id=msg.metadata.partition_id,
-    )
\ No newline at end of file
+    )
diff --git a/src/py/flwr/common/message_test.py b/src/py/flwr/common/message_test.py
index 1681eff19a08..19f8aeb1eb63 100644
--- a/src/py/flwr/common/message_test.py
+++ b/src/py/flwr/common/message_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -202,4 +202,4 @@ def test_repr(cls: type, kwargs: Dict[str, Any]) -> None:
     actual = cls(**kwargs)
 
     # Assert
-    assert str(actual) == str(expected)
\ No newline at end of file
+    assert str(actual) == str(expected)
diff --git a/src/py/flwr/common/object_ref.py b/src/py/flwr/common/object_ref.py
index 9a6eaeaac9c1..ac52be160c2e 100644
--- a/src/py/flwr/common/object_ref.py
+++ b/src/py/flwr/common/object_ref.py
@@ -175,4 +175,4 @@ def _is_module_in_all(attribute_name: str, target: ast.expr, n: ast.Assign) -> b
             for elt in n.value.elts:
                 if isinstance(elt, ast.Str) and elt.s == attribute_name:
                     return True
-    return False
\ No newline at end of file
+    return False
diff --git a/src/py/flwr/common/object_ref_test.py b/src/py/flwr/common/object_ref_test.py
index c22ee6c33ed3..f4513a4319ab 100644
--- a/src/py/flwr/common/object_ref_test.py
+++ b/src/py/flwr/common/object_ref_test.py
@@ -43,4 +43,4 @@ def test_validate_object_reference_fails() -> None:
     assert (
         error
         == f"Unable to find attribute runa in module flwr.cli.run{OBJECT_REF_HELP_STR}"
-    )
\ No newline at end of file
+    )
diff --git a/src/py/flwr/common/parameter.py b/src/py/flwr/common/parameter.py
index b2c1d614ffd7..eefd7abc19a8 100644
--- a/src/py/flwr/common/parameter.py
+++ b/src/py/flwr/common/parameter.py
@@ -51,4 +51,4 @@ def bytes_to_ndarray(tensor: bytes) -> NDArray:
     # Reason: loading pickled data can execute arbitrary code
     # Source: https://numpy.org/doc/stable/reference/generated/numpy.load.html
     ndarray_deserialized = np.load(bytes_io, allow_pickle=False)
-    return cast(NDArray, ndarray_deserialized)
\ No newline at end of file
+    return cast(NDArray, ndarray_deserialized)
diff --git a/src/py/flwr/common/parameter_test.py b/src/py/flwr/common/parameter_test.py
index 92d67ce2bbef..965038ead6d2 100644
--- a/src/py/flwr/common/parameter_test.py
+++ b/src/py/flwr/common/parameter_test.py
@@ -36,4 +36,4 @@ def test_serialisation_deserialisation() -> None:
 
     # Test false positive
     with pytest.raises(AssertionError, match="Arrays are not equal"):
-        np.testing.assert_equal(arr_deserialized, np.ones((3, 2)))
\ No newline at end of file
+        np.testing.assert_equal(arr_deserialized, np.ones((3, 2)))
diff --git a/src/py/flwr/common/pyproject.py b/src/py/flwr/common/pyproject.py
index 6a1ba7f96b28..66585e422397 100644
--- a/src/py/flwr/common/pyproject.py
+++ b/src/py/flwr/common/pyproject.py
@@ -38,4 +38,4 @@ def validate_project_name(name: str) -> bool:
     """
     if not name or len(name) > 40 or not re.match(r"^[a-z0-9-_]+$", name):
         return False
-    return True
\ No newline at end of file
+    return True
diff --git a/src/py/flwr/common/pyproject_test.py b/src/py/flwr/common/pyproject_test.py
index b006e5ebbd43..88a945054b83 100644
--- a/src/py/flwr/common/pyproject_test.py
+++ b/src/py/flwr/common/pyproject_test.py
@@ -1,108 +1,108 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-# ==============================================================================
-"""Tests for the function that validates name property."""
-
-from .pyproject import validate_project_name
-
-
-# Happy Flow
-def test_valid_name_with_lower_case() -> None:
-    """Test a valid single-word project name with all lower case."""
-    # Prepare
-    name = "myproject"
-    expected = True
-    # Execute
-    actual = validate_project_name(name)
-    # Assert
-    assert actual == expected, f"Expected {name} to be valid"
-
-
-def test_valid_name_with_dashes() -> None:
-    """Test a valid project name with hyphens inbetween."""
-    # Prepare
-    name = "valid-project-name"
-    expected = True
-    # Execute
-    actual = validate_project_name(name)
-    # Assert
-    assert actual == expected, f"Expected {name} to be valid"
-
-
-def test_valid_name_with_underscores() -> None:
-    """Test a valid project name with underscores inbetween."""
-    # Prepare
-    name = "valid_project_name"
-    expected = True
-    # Execute
-    actual = validate_project_name(name)
-    # Assert
-    assert actual == expected, f"Expected {name} to be valid"
-
-
-def test_invalid_name_with_upper_letters() -> None:
-    """Tests a project name with Spaces and Uppercase letter."""
-    # Prepare
-    name = "Invalid Project Name"
-    expected = False
-    # Execute
-    actual = validate_project_name(name)
-    # Assert
-    assert actual == expected, "Upper Case and Spaces are not allowed"
-
-
-def test_name_with_spaces() -> None:
-    """Tests a project name with spaces inbetween."""
-    # Prepare
-    name = "name with spaces"
-    expected = False
-    # Execute
-    actual = validate_project_name(name)
-    # Assert
-    assert actual == expected, "Spaces are not allowed"
-
-
-def test_empty_name() -> None:
-    """Tests use-case for an empty project name."""
-    # Prepare
-    name = ""
-    expected = False
-    # Execute
-    actual = validate_project_name(name)
-    # Assert
-    assert actual == expected, "Empty name is not valid"
-
-
-def test_long_name() -> None:
-    """Tests for long project names."""
-    # Prepare
-    name = "a" * 41
-    expected = False
-    # Execute
-    actual = validate_project_name(name)
-    # Assert
-    # It can be more than 40 but generally
-    # it is recommended not to be more than 40
-    assert actual == expected, "Name longer than 40 characters is not recommended"
-
-
-def test_name_with_special_characters() -> None:
-    """Tests for project names with special characters."""
-    # Prepare
-    name = "name!@#"
-    expected = False
-    # Execute
-    actual = validate_project_name(name)
-    # Assert
-    assert actual == expected, "Special characters are not allowed"
\ No newline at end of file
+# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+"""Tests for the function that validates name property."""
+
+from .pyproject import validate_project_name
+
+
+# Happy Flow
+def test_valid_name_with_lower_case() -> None:
+    """Test a valid single-word project name with all lower case."""
+    # Prepare
+    name = "myproject"
+    expected = True
+    # Execute
+    actual = validate_project_name(name)
+    # Assert
+    assert actual == expected, f"Expected {name} to be valid"
+
+
+def test_valid_name_with_dashes() -> None:
+    """Test a valid project name with hyphens inbetween."""
+    # Prepare
+    name = "valid-project-name"
+    expected = True
+    # Execute
+    actual = validate_project_name(name)
+    # Assert
+    assert actual == expected, f"Expected {name} to be valid"
+
+
+def test_valid_name_with_underscores() -> None:
+    """Test a valid project name with underscores inbetween."""
+    # Prepare
+    name = "valid_project_name"
+    expected = True
+    # Execute
+    actual = validate_project_name(name)
+    # Assert
+    assert actual == expected, f"Expected {name} to be valid"
+
+
+def test_invalid_name_with_upper_letters() -> None:
+    """Tests a project name with Spaces and Uppercase letter."""
+    # Prepare
+    name = "Invalid Project Name"
+    expected = False
+    # Execute
+    actual = validate_project_name(name)
+    # Assert
+    assert actual == expected, "Upper Case and Spaces are not allowed"
+
+
+def test_name_with_spaces() -> None:
+    """Tests a project name with spaces inbetween."""
+    # Prepare
+    name = "name with spaces"
+    expected = False
+    # Execute
+    actual = validate_project_name(name)
+    # Assert
+    assert actual == expected, "Spaces are not allowed"
+
+
+def test_empty_name() -> None:
+    """Tests use-case for an empty project name."""
+    # Prepare
+    name = ""
+    expected = False
+    # Execute
+    actual = validate_project_name(name)
+    # Assert
+    assert actual == expected, "Empty name is not valid"
+
+
+def test_long_name() -> None:
+    """Tests for long project names."""
+    # Prepare
+    name = "a" * 41
+    expected = False
+    # Execute
+    actual = validate_project_name(name)
+    # Assert
+    # It can be more than 40 but generally
+    # it is recommended not to be more than 40
+    assert actual == expected, "Name longer than 40 characters is not recommended"
+
+
+def test_name_with_special_characters() -> None:
+    """Tests for project names with special characters."""
+    # Prepare
+    name = "name!@#"
+    expected = False
+    # Execute
+    actual = validate_project_name(name)
+    # Assert
+    assert actual == expected, "Special characters are not allowed"
diff --git a/src/py/flwr/common/record/__init__.py b/src/py/flwr/common/record/__init__.py
index c6c0e2f7fea1..88eef5f7aea1 100644
--- a/src/py/flwr/common/record/__init__.py
+++ b/src/py/flwr/common/record/__init__.py
@@ -27,4 +27,4 @@
     "ParametersRecord",
     "RecordSet",
     "array_from_numpy",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/common/record/configsrecord.py b/src/py/flwr/common/record/configsrecord.py
index 85776ac1d7f5..471c85f0b961 100644
--- a/src/py/flwr/common/record/configsrecord.py
+++ b/src/py/flwr/common/record/configsrecord.py
@@ -120,4 +120,4 @@ def get_var_bytes(value: ConfigsScalar) -> int:
             # We also count the bytes footprint of the keys
             num_bytes += len(k)
 
-        return num_bytes
\ No newline at end of file
+        return num_bytes
diff --git a/src/py/flwr/common/record/conversion_utils.py b/src/py/flwr/common/record/conversion_utils.py
index 3b8ec88e66f2..7cc0b04283e9 100644
--- a/src/py/flwr/common/record/conversion_utils.py
+++ b/src/py/flwr/common/record/conversion_utils.py
@@ -37,4 +37,4 @@ def array_from_numpy(ndarray: NDArray) -> Array:
         shape=list(ndarray.shape),
         stype=SType.NUMPY,
         data=data,
-    )
\ No newline at end of file
+    )
diff --git a/src/py/flwr/common/record/conversion_utils_test.py b/src/py/flwr/common/record/conversion_utils_test.py
index 325e6578430d..84be37fda4a3 100644
--- a/src/py/flwr/common/record/conversion_utils_test.py
+++ b/src/py/flwr/common/record/conversion_utils_test.py
@@ -41,4 +41,4 @@ def test_array_from_numpy(self) -> None:
         self.assertEqual(array_instance.dtype, str(original_array.dtype))
         self.assertEqual(array_instance.shape, list(original_array.shape))
         self.assertEqual(array_instance.stype, SType.NUMPY)
-        np.testing.assert_array_equal(deserialized_array, original_array)
\ No newline at end of file
+        np.testing.assert_array_equal(deserialized_array, original_array)
diff --git a/src/py/flwr/common/record/metricsrecord.py b/src/py/flwr/common/record/metricsrecord.py
index 40d1f33fe475..2b6e584be390 100644
--- a/src/py/flwr/common/record/metricsrecord.py
+++ b/src/py/flwr/common/record/metricsrecord.py
@@ -99,4 +99,4 @@ def count_bytes(self) -> int:
                 num_bytes += 8
             # We also count the bytes footprint of the keys
             num_bytes += len(k)
-        return num_bytes
\ No newline at end of file
+        return num_bytes
diff --git a/src/py/flwr/common/record/parametersrecord.py b/src/py/flwr/common/record/parametersrecord.py
index 80178ceb5c31..93db6d387b53 100644
--- a/src/py/flwr/common/record/parametersrecord.py
+++ b/src/py/flwr/common/record/parametersrecord.py
@@ -132,4 +132,4 @@ def count_bytes(self) -> int:
             # We also count the bytes footprint of the keys
             num_bytes += len(k)
 
-        return num_bytes
\ No newline at end of file
+        return num_bytes
diff --git a/src/py/flwr/common/record/parametersrecord_test.py b/src/py/flwr/common/record/parametersrecord_test.py
index b95a3c4a2d04..e840e5e266e4 100644
--- a/src/py/flwr/common/record/parametersrecord_test.py
+++ b/src/py/flwr/common/record/parametersrecord_test.py
@@ -98,4 +98,4 @@ def test_count_bytes(shape: List[int], dtype: str) -> None:
     key_name = "data"
     p_record = ParametersRecord(OrderedDict({key_name: array_instance}))
 
-    assert len(buff) + len(key_name) == p_record.count_bytes()
\ No newline at end of file
+    assert len(buff) + len(key_name) == p_record.count_bytes()
diff --git a/src/py/flwr/common/record/recordset.py b/src/py/flwr/common/record/recordset.py
index 60aba5607d0a..74eed46ad86f 100644
--- a/src/py/flwr/common/record/recordset.py
+++ b/src/py/flwr/common/record/recordset.py
@@ -127,4 +127,4 @@ def __eq__(self, other: object) -> bool:
         """Compare two instances of the class."""
         if not isinstance(other, self.__class__):
             raise NotImplementedError
-        return self.__dict__ == other.__dict__
\ No newline at end of file
+        return self.__dict__ == other.__dict__
diff --git a/src/py/flwr/common/record/recordset_test.py b/src/py/flwr/common/record/recordset_test.py
index a1523b907183..01260793cb41 100644
--- a/src/py/flwr/common/record/recordset_test.py
+++ b/src/py/flwr/common/record/recordset_test.py
@@ -429,4 +429,4 @@ def test_recordset_repr() -> None:
     expected = namedtuple("RecordSet", kwargs.keys())(**kwargs)
 
     # Assert
-    assert str(rs) == str(expected)
\ No newline at end of file
+    assert str(rs) == str(expected)
diff --git a/src/py/flwr/common/record/typeddict.py b/src/py/flwr/common/record/typeddict.py
index fd4f2c3ac763..23d70dc4f7e8 100644
--- a/src/py/flwr/common/record/typeddict.py
+++ b/src/py/flwr/common/record/typeddict.py
@@ -110,4 +110,4 @@ def clear(self) -> None:
 
         Remove all items from R.
         """
-        self._data.clear()
\ No newline at end of file
+        self._data.clear()
diff --git a/src/py/flwr/common/recordset_compat.py b/src/py/flwr/common/recordset_compat.py
index afb10924d9d4..1b0bf52d8277 100644
--- a/src/py/flwr/common/recordset_compat.py
+++ b/src/py/flwr/common/recordset_compat.py
@@ -403,4 +403,4 @@ def getpropertiesres_to_recordset(getpropertiesres: GetPropertiesRes) -> RecordS
         res_str, getpropertiesres.status, recordset
     )
 
-    return recordset
\ No newline at end of file
+    return recordset
diff --git a/src/py/flwr/common/recordset_compat_test.py b/src/py/flwr/common/recordset_compat_test.py
index f9e1fab71dbd..e0ac7f216af9 100644
--- a/src/py/flwr/common/recordset_compat_test.py
+++ b/src/py/flwr/common/recordset_compat_test.py
@@ -311,4 +311,4 @@ def test_get_parameters_res_to_recordset_and_back(
 
     assert validate_freed_fn(
         getparameteres_res, getparameters_res_copy, getparameteres_res_
-    )
\ No newline at end of file
+    )
diff --git a/src/py/flwr/common/retry_invoker.py b/src/py/flwr/common/retry_invoker.py
index 1495c919df42..d12124b89840 100644
--- a/src/py/flwr/common/retry_invoker.py
+++ b/src/py/flwr/common/retry_invoker.py
@@ -298,4 +298,4 @@ def giveup_check(_exception: Exception) -> bool:
             else:
                 # Trigger success event
                 try_call_event_handler(self.on_success)
-                return ret
\ No newline at end of file
+                return ret
diff --git a/src/py/flwr/common/retry_invoker_test.py b/src/py/flwr/common/retry_invoker_test.py
index 7629fe0978a9..2259ae47ded4 100644
--- a/src/py/flwr/common/retry_invoker_test.py
+++ b/src/py/flwr/common/retry_invoker_test.py
@@ -184,4 +184,4 @@ def should_give_up(exc: Exception) -> bool:
 
     # Execute and Assert
     with pytest.raises(ValueError):
-        invoker.invoke(failing_function)
\ No newline at end of file
+        invoker.invoke(failing_function)
diff --git a/src/py/flwr/common/secure_aggregation/__init__.py b/src/py/flwr/common/secure_aggregation/__init__.py
index fef36721f323..b4e0acc0c148 100644
--- a/src/py/flwr/common/secure_aggregation/__init__.py
+++ b/src/py/flwr/common/secure_aggregation/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Utility functions for Secure Aggregation."""
\ No newline at end of file
+"""Utility functions for Secure Aggregation."""
diff --git a/src/py/flwr/common/secure_aggregation/crypto/__init__.py b/src/py/flwr/common/secure_aggregation/crypto/__init__.py
index 39728ad59fd1..2cb34493f7d0 100644
--- a/src/py/flwr/common/secure_aggregation/crypto/__init__.py
+++ b/src/py/flwr/common/secure_aggregation/crypto/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Cryptographic primitives for Secure Aggregation."""
\ No newline at end of file
+"""Cryptographic primitives for Secure Aggregation."""
diff --git a/src/py/flwr/common/secure_aggregation/crypto/shamir.py b/src/py/flwr/common/secure_aggregation/crypto/shamir.py
index 2bffcdcb79b8..e56e21b89371 100644
--- a/src/py/flwr/common/secure_aggregation/crypto/shamir.py
+++ b/src/py/flwr/common/secure_aggregation/crypto/shamir.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -72,4 +72,4 @@ def combine_shares(share_list: List[bytes]) -> bytes:
 
 
 def _shamir_combine(shares: List[Tuple[int, bytes]]) -> bytes:
-    return Shamir.combine(shares, ssss=False)
\ No newline at end of file
+    return Shamir.combine(shares, ssss=False)
diff --git a/src/py/flwr/common/secure_aggregation/crypto/symmetric_encryption.py b/src/py/flwr/common/secure_aggregation/crypto/symmetric_encryption.py
index baa9d2f0f0ba..1d004a398ea8 100644
--- a/src/py/flwr/common/secure_aggregation/crypto/symmetric_encryption.py
+++ b/src/py/flwr/common/secure_aggregation/crypto/symmetric_encryption.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -116,4 +116,4 @@ def verify_hmac(key: bytes, message: bytes, hmac_value: bytes) -> bool:
         computed_hmac.verify(hmac_value)
         return True
     except InvalidSignature:
-        return False
\ No newline at end of file
+        return False
diff --git a/src/py/flwr/common/secure_aggregation/crypto/symmetric_encryption_test.py b/src/py/flwr/common/secure_aggregation/crypto/symmetric_encryption_test.py
index 374d6c2a15c6..f62276b63ff3 100644
--- a/src/py/flwr/common/secure_aggregation/crypto/symmetric_encryption_test.py
+++ b/src/py/flwr/common/secure_aggregation/crypto/symmetric_encryption_test.py
@@ -99,4 +99,4 @@ def test_wrong_message_hmac() -> None:
     client_compute_hmac = compute_hmac(client_shared_secret, other_message)
 
     # Assert
-    assert verify_hmac(server_shared_secret, message, client_compute_hmac) is False
\ No newline at end of file
+    assert verify_hmac(server_shared_secret, message, client_compute_hmac) is False
diff --git a/src/py/flwr/common/secure_aggregation/ndarrays_arithmetic.py b/src/py/flwr/common/secure_aggregation/ndarrays_arithmetic.py
index 5a0be09eb12b..e926a9531bea 100644
--- a/src/py/flwr/common/secure_aggregation/ndarrays_arithmetic.py
+++ b/src/py/flwr/common/secure_aggregation/ndarrays_arithmetic.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -78,4 +78,4 @@ def parameters_divide(
     parameters: List[NDArray[Any]], divisor: Union[int, float]
 ) -> List[NDArray[Any]]:
     """Divide weight by an integer/float divisor."""
-    return [parameters[idx] / divisor for idx in range(len(parameters))]
\ No newline at end of file
+    return [parameters[idx] / divisor for idx in range(len(parameters))]
diff --git a/src/py/flwr/common/secure_aggregation/quantization.py b/src/py/flwr/common/secure_aggregation/quantization.py
index b0a81c9b30da..56c25e2bd59c 100644
--- a/src/py/flwr/common/secure_aggregation/quantization.py
+++ b/src/py/flwr/common/secure_aggregation/quantization.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -61,4 +61,4 @@ def dequantize(
         recon_arr = arr.view(np.ndarray).astype(float)
         recon_arr = cast(NDArrayFloat, recon_arr * quantizer + shift)
         reverse_quantized_list.append(recon_arr)
-    return reverse_quantized_list
\ No newline at end of file
+    return reverse_quantized_list
diff --git a/src/py/flwr/common/secure_aggregation/secaggplus_constants.py b/src/py/flwr/common/secure_aggregation/secaggplus_constants.py
index 0d3eff67678d..8a15908c13c5 100644
--- a/src/py/flwr/common/secure_aggregation/secaggplus_constants.py
+++ b/src/py/flwr/common/secure_aggregation/secaggplus_constants.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -66,4 +66,4 @@ class Key:
 
     def __new__(cls) -> Key:
         """Prevent instantiation."""
-        raise TypeError(f"{cls.__name__} cannot be instantiated.")
\ No newline at end of file
+        raise TypeError(f"{cls.__name__} cannot be instantiated.")
diff --git a/src/py/flwr/common/secure_aggregation/secaggplus_utils.py b/src/py/flwr/common/secure_aggregation/secaggplus_utils.py
index 8a120a50646c..c373573477b9 100644
--- a/src/py/flwr/common/secure_aggregation/secaggplus_utils.py
+++ b/src/py/flwr/common/secure_aggregation/secaggplus_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -99,4 +99,4 @@ def pseudo_rand_gen(
         else:
             arr = gen.randint(0, num_range - 1, dimension)
         output.append(arr)
-    return output
\ No newline at end of file
+    return output
diff --git a/src/py/flwr/common/serde.py b/src/py/flwr/common/serde.py
index e7f808102876..84932b806aff 100644
--- a/src/py/flwr/common/serde.py
+++ b/src/py/flwr/common/serde.py
@@ -670,4 +670,4 @@ def message_from_taskres(taskres: TaskRes) -> Message:
         ),
     )
     message.metadata.created_at = taskres.task.created_at
-    return message
\ No newline at end of file
+    return message
diff --git a/src/py/flwr/common/serde_test.py b/src/py/flwr/common/serde_test.py
index 77ef5548c0c3..f9969426fc36 100644
--- a/src/py/flwr/common/serde_test.py
+++ b/src/py/flwr/common/serde_test.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -386,4 +386,4 @@ def test_message_to_and_from_taskres(
         assert original.content == deserialized.content
     if original.has_error():
         assert original.error == deserialized.error
-    assert metadata == deserialized.metadata
\ No newline at end of file
+    assert metadata == deserialized.metadata
diff --git a/src/py/flwr/common/telemetry.py b/src/py/flwr/common/telemetry.py
index 91fadc276d81..eeb255e8d6eb 100644
--- a/src/py/flwr/common/telemetry.py
+++ b/src/py/flwr/common/telemetry.py
@@ -260,4 +260,4 @@ def create_event(event_type: EventType, event_details: Optional[Dict[str, Any]])
             if FLWR_TELEMETRY_LOGGING == "1":
                 log(ex)
 
-    return "disabled"
\ No newline at end of file
+    return "disabled"
diff --git a/src/py/flwr/common/telemetry_test.py b/src/py/flwr/common/telemetry_test.py
index 1091194d6ac2..a5eea48443b5 100644
--- a/src/py/flwr/common/telemetry_test.py
+++ b/src/py/flwr/common/telemetry_test.py
@@ -108,4 +108,4 @@ def _new_failing_get_home() -> None:
             source_id = _get_source_id()
 
         # Assert
-        self.assertEqual(source_id, except_value)
\ No newline at end of file
+        self.assertEqual(source_id, except_value)
diff --git a/src/py/flwr/common/typing.py b/src/py/flwr/common/typing.py
index 9f50b36c7feb..f51830955679 100644
--- a/src/py/flwr/common/typing.py
+++ b/src/py/flwr/common/typing.py
@@ -193,4 +193,4 @@ class Run:
 
     run_id: int
     fab_id: str
-    fab_version: str
\ No newline at end of file
+    fab_version: str
diff --git a/src/py/flwr/common/version.py b/src/py/flwr/common/version.py
index 9725bf2aee67..6808c66606b1 100644
--- a/src/py/flwr/common/version.py
+++ b/src/py/flwr/common/version.py
@@ -1,17 +1,3 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-# ==============================================================================
 """Flower package version helper."""
 
 import importlib.metadata as importlib_metadata
@@ -39,4 +25,4 @@ def _version() -> Tuple[str, str]:
     return ("unknown", "unknown")
 
 
-package_name, package_version = _version()
\ No newline at end of file
+package_name, package_version = _version()
diff --git a/src/py/flwr/server/__init__.py b/src/py/flwr/server/__init__.py
index 47a462384e85..546ce263e2d5 100644
--- a/src/py/flwr/server/__init__.py
+++ b/src/py/flwr/server/__init__.py
@@ -43,4 +43,4 @@
     "start_server",
     "strategy",
     "workflow",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/server/app.py b/src/py/flwr/server/app.py
index 15eec8d7bbe3..1574ec46f968 100644
--- a/src/py/flwr/server/app.py
+++ b/src/py/flwr/server/app.py
@@ -618,4 +618,4 @@ def _add_args_fleet_api(parser: argparse.ArgumentParser) -> None:
         default=1,
         type=int,
         help="Set the number of concurrent workers for the Fleet API server.",
-    )
\ No newline at end of file
+    )
diff --git a/src/py/flwr/server/client_manager.py b/src/py/flwr/server/client_manager.py
index c5e4cf449d01..7956e282bd2c 100644
--- a/src/py/flwr/server/client_manager.py
+++ b/src/py/flwr/server/client_manager.py
@@ -203,4 +203,4 @@ def sample(
             return []
 
         sampled_cids = random.sample(available_cids, num_clients)
-        return [self.clients[cid] for cid in sampled_cids]
\ No newline at end of file
+        return [self.clients[cid] for cid in sampled_cids]
diff --git a/src/py/flwr/server/client_manager_test.py b/src/py/flwr/server/client_manager_test.py
index 0acc137bab73..5820881b6aad 100644
--- a/src/py/flwr/server/client_manager_test.py
+++ b/src/py/flwr/server/client_manager_test.py
@@ -52,4 +52,4 @@ def test_simple_client_manager_unregister() -> None:
     client_manager.unregister(client)
 
     # Assert
-    assert len(client_manager) == 0
\ No newline at end of file
+    assert len(client_manager) == 0
diff --git a/src/py/flwr/server/client_proxy.py b/src/py/flwr/server/client_proxy.py
index 1ff57c5ff6ef..951e4ae992da 100644
--- a/src/py/flwr/server/client_proxy.py
+++ b/src/py/flwr/server/client_proxy.py
@@ -85,4 +85,4 @@ def reconnect(
         timeout: Optional[float],
         group_id: Optional[int],
     ) -> DisconnectRes:
-        """Disconnect and (optionally) reconnect later."""
\ No newline at end of file
+        """Disconnect and (optionally) reconnect later."""
diff --git a/src/py/flwr/server/client_proxy_test.py b/src/py/flwr/server/client_proxy_test.py
index ce6507ea5ffd..685698558e3a 100644
--- a/src/py/flwr/server/client_proxy_test.py
+++ b/src/py/flwr/server/client_proxy_test.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -116,4 +116,4 @@ def test_properties_are_empty() -> None:
     actual_properties = client_proxy.properties
 
     # Assert
-    assert not actual_properties
\ No newline at end of file
+    assert not actual_properties
diff --git a/src/py/flwr/server/compat/__init__.py b/src/py/flwr/server/compat/__init__.py
index e494e32a7054..7bae196ddb65 100644
--- a/src/py/flwr/server/compat/__init__.py
+++ b/src/py/flwr/server/compat/__init__.py
@@ -21,4 +21,4 @@
 __all__ = [
     "LegacyContext",
     "start_driver",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/server/compat/app.py b/src/py/flwr/server/compat/app.py
index 73942d65ae6e..4bb23b846ab7 100644
--- a/src/py/flwr/server/compat/app.py
+++ b/src/py/flwr/server/compat/app.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -98,4 +98,4 @@ def start_driver(  # pylint: disable=too-many-arguments, too-many-locals
 
     event(EventType.START_SERVER_LEAVE)
 
-    return hist
\ No newline at end of file
+    return hist
diff --git a/src/py/flwr/server/compat/app_utils.py b/src/py/flwr/server/compat/app_utils.py
index 8f8e19173bc4..1cdf1efbffb9 100644
--- a/src/py/flwr/server/compat/app_utils.py
+++ b/src/py/flwr/server/compat/app_utils.py
@@ -100,4 +100,4 @@ def _update_client_manager(
 
         # Sleep for 3 seconds
         if not f_stop.is_set():
-            f_stop.wait(3)
\ No newline at end of file
+            f_stop.wait(3)
diff --git a/src/py/flwr/server/compat/app_utils_test.py b/src/py/flwr/server/compat/app_utils_test.py
index b1dc96a6f3b5..023d65b0dc72 100644
--- a/src/py/flwr/server/compat/app_utils_test.py
+++ b/src/py/flwr/server/compat/app_utils_test.py
@@ -68,4 +68,4 @@ def custom_wait(self: Event, timeout: Optional[float] = None) -> None:
         assert updated_node_ids == set(updated_expected_node_ids)
 
         # Exit
-        thread.join()
\ No newline at end of file
+        thread.join()
diff --git a/src/py/flwr/server/compat/driver_client_proxy.py b/src/py/flwr/server/compat/driver_client_proxy.py
index a6b94855ffa3..150803786f98 100644
--- a/src/py/flwr/server/compat/driver_client_proxy.py
+++ b/src/py/flwr/server/compat/driver_client_proxy.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -147,4 +147,4 @@ def _send_receive_recordset(
 
             if timeout is not None and time.time() > start_time + timeout:
                 raise RuntimeError("Timeout reached")
-            time.sleep(SLEEP_TIME)
\ No newline at end of file
+            time.sleep(SLEEP_TIME)
diff --git a/src/py/flwr/server/compat/driver_client_proxy_test.py b/src/py/flwr/server/compat/driver_client_proxy_test.py
index 9ffc2f8af299..d9e3d3bc0824 100644
--- a/src/py/flwr/server/compat/driver_client_proxy_test.py
+++ b/src/py/flwr/server/compat/driver_client_proxy_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -288,4 +288,4 @@ def _common_assertions(self, original_ins: Any) -> None:
         except AssertionError:
             self.driver.pull_messages.assert_called_with(
                 message_ids=[INSTRUCTION_MESSAGE_ID]
-            )
\ No newline at end of file
+            )
diff --git a/src/py/flwr/server/compat/legacy_context.py b/src/py/flwr/server/compat/legacy_context.py
index 26b4d5cfeb0c..0b00c98bb16d 100644
--- a/src/py/flwr/server/compat/legacy_context.py
+++ b/src/py/flwr/server/compat/legacy_context.py
@@ -52,4 +52,4 @@ def __init__(
         self.strategy = strategy
         self.client_manager = client_manager
         self.history = History()
-        super().__init__(state)
\ No newline at end of file
+        super().__init__(state)
diff --git a/src/py/flwr/server/criterion.py b/src/py/flwr/server/criterion.py
index 2b4f0bfbe6d3..199a609104cb 100644
--- a/src/py/flwr/server/criterion.py
+++ b/src/py/flwr/server/criterion.py
@@ -25,4 +25,4 @@ class Criterion(ABC):
 
     @abstractmethod
     def select(self, client: ClientProxy) -> bool:
-        """Decide whether a client should be eligible for sampling or not."""
\ No newline at end of file
+        """Decide whether a client should be eligible for sampling or not."""
diff --git a/src/py/flwr/server/criterion_test.py b/src/py/flwr/server/criterion_test.py
index 08d8919e5e15..f678825f064e 100644
--- a/src/py/flwr/server/criterion_test.py
+++ b/src/py/flwr/server/criterion_test.py
@@ -74,4 +74,4 @@ def test_criterion_not_applied() -> None:
     assert client1 in sampled_clients
     assert client2 in sampled_clients
     assert client3 in sampled_clients
-    assert client4 in sampled_clients
\ No newline at end of file
+    assert client4 in sampled_clients
diff --git a/src/py/flwr/server/driver/__init__.py b/src/py/flwr/server/driver/__init__.py
index c9eabc58e998..deaddff77702 100644
--- a/src/py/flwr/server/driver/__init__.py
+++ b/src/py/flwr/server/driver/__init__.py
@@ -23,4 +23,4 @@
     "Driver",
     "GrpcDriver",
     "InMemoryDriver",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/server/driver/driver.py b/src/py/flwr/server/driver/driver.py
index 8fef9c2ea564..b95cec95ab47 100644
--- a/src/py/flwr/server/driver/driver.py
+++ b/src/py/flwr/server/driver/driver.py
@@ -137,4 +137,4 @@ def send_and_receive(
         to collect the replies. If `timeout` is set, the method may not return
         replies for all sent messages. A message remains valid until its TTL,
         which is not affected by `timeout`.
-        """
\ No newline at end of file
+        """
diff --git a/src/py/flwr/server/driver/grpc_driver.py b/src/py/flwr/server/driver/grpc_driver.py
index 2bd34d9716f3..d339f1b232f9 100644
--- a/src/py/flwr/server/driver/grpc_driver.py
+++ b/src/py/flwr/server/driver/grpc_driver.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -312,4 +312,4 @@ def close(self) -> None:
         if self.driver_helper is None:
             return
         # Disconnect
-        self.driver_helper.disconnect()
\ No newline at end of file
+        self.driver_helper.disconnect()
diff --git a/src/py/flwr/server/driver/grpc_driver_test.py b/src/py/flwr/server/driver/grpc_driver_test.py
index 4c55c4790003..fbead0e3043d 100644
--- a/src/py/flwr/server/driver/grpc_driver_test.py
+++ b/src/py/flwr/server/driver/grpc_driver_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -219,4 +219,4 @@ def test_del_with_uninitialized_driver(self) -> None:
         self.driver.close()
 
         # Assert
-        self.mock_grpc_driver_helper.disconnect.assert_not_called()
\ No newline at end of file
+        self.mock_grpc_driver_helper.disconnect.assert_not_called()
diff --git a/src/py/flwr/server/driver/inmemory_driver.py b/src/py/flwr/server/driver/inmemory_driver.py
index 99a234750b3b..8c71b1067293 100644
--- a/src/py/flwr/server/driver/inmemory_driver.py
+++ b/src/py/flwr/server/driver/inmemory_driver.py
@@ -178,4 +178,4 @@ def send_and_receive(
                 break
             # Sleep
             time.sleep(3)
-        return ret
\ No newline at end of file
+        return ret
diff --git a/src/py/flwr/server/driver/inmemory_driver_test.py b/src/py/flwr/server/driver/inmemory_driver_test.py
index 86cb3318a602..95c2a0b277af 100644
--- a/src/py/flwr/server/driver/inmemory_driver_test.py
+++ b/src/py/flwr/server/driver/inmemory_driver_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -244,4 +244,4 @@ def test_task_store_consistency_after_push_pull_inmemory_state(self) -> None:
         # Assert
         self.assertEqual(reply_tos, msg_ids)
         self.assertEqual(len(self.driver.state.task_res_store), 0)  # type: ignore
-        self.assertEqual(len(self.driver.state.task_ins_store), 0)  # type: ignore
\ No newline at end of file
+        self.assertEqual(len(self.driver.state.task_ins_store), 0)  # type: ignore
diff --git a/src/py/flwr/server/history.py b/src/py/flwr/server/history.py
index 57d61c9004bd..291974a4323c 100644
--- a/src/py/flwr/server/history.py
+++ b/src/py/flwr/server/history.py
@@ -122,4 +122,4 @@ def __repr__(self) -> str:
             rep += "History (metrics, centralized):\n" + pprint.pformat(
                 self.metrics_centralized
             )
-        return rep
\ No newline at end of file
+        return rep
diff --git a/src/py/flwr/server/history_test.py b/src/py/flwr/server/history_test.py
index f1721bb2d255..adb9d697e409 100644
--- a/src/py/flwr/server/history_test.py
+++ b/src/py/flwr/server/history_test.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -79,4 +79,4 @@ def test_add_metrics_centralized() -> None:
     assert len(history.losses_centralized) == 0
     assert len(history.metrics_distributed) == 0
     assert len(history.metrics_centralized) == 1
-    assert (0, 0.9) == history.metrics_centralized["acc"][0]
\ No newline at end of file
+    assert (0, 0.9) == history.metrics_centralized["acc"][0]
diff --git a/src/py/flwr/server/run_serverapp.py b/src/py/flwr/server/run_serverapp.py
index c2a710071525..efd3f6846264 100644
--- a/src/py/flwr/server/run_serverapp.py
+++ b/src/py/flwr/server/run_serverapp.py
@@ -224,4 +224,4 @@ def _parse_args_run_server_app() -> argparse.ArgumentParser:
         help="The version of the FAB used in the run.",
     )
 
-    return parser
\ No newline at end of file
+    return parser
diff --git a/src/py/flwr/server/server.py b/src/py/flwr/server/server.py
index 8f87cc8ff32c..f1bfb6f0533b 100644
--- a/src/py/flwr/server/server.py
+++ b/src/py/flwr/server/server.py
@@ -501,4 +501,4 @@ def run_fl(
     # Graceful shutdown
     server.disconnect_all_clients(timeout=config.round_timeout)
 
-    return hist
\ No newline at end of file
+    return hist
diff --git a/src/py/flwr/server/server_app.py b/src/py/flwr/server/server_app.py
index e2c10f371d15..43b3bcce3f36 100644
--- a/src/py/flwr/server/server_app.py
+++ b/src/py/flwr/server/server_app.py
@@ -133,4 +133,4 @@ def main_decorator(main_fn: ServerAppCallable) -> ServerAppCallable:
 
 
 class LoadServerAppError(Exception):
-    """Error when trying to load `ServerApp`."""
\ No newline at end of file
+    """Error when trying to load `ServerApp`."""
diff --git a/src/py/flwr/server/server_app_test.py b/src/py/flwr/server/server_app_test.py
index becb269df4af..38c0d6240d90 100644
--- a/src/py/flwr/server/server_app_test.py
+++ b/src/py/flwr/server/server_app_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -59,4 +59,4 @@ def test_server_app_exception_when_both_modes() -> None:
         def custom_main(driver: Driver, context: Context) -> None:
             pass
 
-        # pylint: enable=unused-argument
\ No newline at end of file
+        # pylint: enable=unused-argument
diff --git a/src/py/flwr/server/server_config.py b/src/py/flwr/server/server_config.py
index a642c1842636..c47367eab4c0 100644
--- a/src/py/flwr/server/server_config.py
+++ b/src/py/flwr/server/server_config.py
@@ -37,4 +37,4 @@ def __repr__(self) -> str:
             if self.round_timeout is None
             else f"round_timeout={self.round_timeout}s"
         )
-        return f"num_rounds={self.num_rounds}, {timeout_string}"
\ No newline at end of file
+        return f"num_rounds={self.num_rounds}, {timeout_string}"
diff --git a/src/py/flwr/server/server_test.py b/src/py/flwr/server/server_test.py
index 7a3498f1b82c..f47b5c3d8469 100644
--- a/src/py/flwr/server/server_test.py
+++ b/src/py/flwr/server/server_test.py
@@ -266,4 +266,4 @@ def test_setup_client_auth() -> None:  # pylint: disable=R0914
         )
         assert public_key_to_bytes(result[2]) == public_key_to_bytes(
             expected_public_key
-        )
\ No newline at end of file
+        )
diff --git a/src/py/flwr/server/strategy/__init__.py b/src/py/flwr/server/strategy/__init__.py
index 045e361b84b4..e5bc30009819 100644
--- a/src/py/flwr/server/strategy/__init__.py
+++ b/src/py/flwr/server/strategy/__init__.py
@@ -73,4 +73,4 @@
     "Krum",
     "QFedAvg",
     "Strategy",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/server/strategy/aggregate.py b/src/py/flwr/server/strategy/aggregate.py
index 6900965a7404..c668b55eebe6 100644
--- a/src/py/flwr/server/strategy/aggregate.py
+++ b/src/py/flwr/server/strategy/aggregate.py
@@ -363,4 +363,4 @@ def _aggregate_n_closest_weights(
             other_weights_layer_np, indices=indices, axis=0
         )[:beta_closest]
         aggregated_weights.append(np.mean(beta_closest_weights, axis=0))
-    return aggregated_weights
\ No newline at end of file
+    return aggregated_weights
diff --git a/src/py/flwr/server/strategy/aggregate_test.py b/src/py/flwr/server/strategy/aggregate_test.py
index 8d23c3aa5286..f8b4e3c03b50 100644
--- a/src/py/flwr/server/strategy/aggregate_test.py
+++ b/src/py/flwr/server/strategy/aggregate_test.py
@@ -138,4 +138,4 @@ def test_aggregate_n_closest_weights_mean() -> None:
             np.array_equal(expected, result)
             for expected, result in zip(expected_averaged, beta_closest_weights)
         )
-    )
\ No newline at end of file
+    )
diff --git a/src/py/flwr/server/strategy/bulyan.py b/src/py/flwr/server/strategy/bulyan.py
index 0d3265a9688d..1e4f97530ab7 100644
--- a/src/py/flwr/server/strategy/bulyan.py
+++ b/src/py/flwr/server/strategy/bulyan.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -159,4 +159,4 @@ def aggregate_fit(
         elif server_round == 1:  # Only log this warning once
             log(WARNING, "No fit_metrics_aggregation_fn provided")
 
-        return parameters_aggregated, metrics_aggregated
\ No newline at end of file
+        return parameters_aggregated, metrics_aggregated
diff --git a/src/py/flwr/server/strategy/bulyan_test.py b/src/py/flwr/server/strategy/bulyan_test.py
index 5b58cc3b19b0..299ed49066fb 100644
--- a/src/py/flwr/server/strategy/bulyan_test.py
+++ b/src/py/flwr/server/strategy/bulyan_test.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -128,4 +128,4 @@ def test_aggregate_fit() -> None:
     if actual_aggregated:
         actual_list = parameters_to_ndarrays(actual_aggregated)
         actual = actual_list[0]
-    assert (actual == expected[0]).all()
\ No newline at end of file
+    assert (actual == expected[0]).all()
diff --git a/src/py/flwr/server/strategy/dp_adaptive_clipping.py b/src/py/flwr/server/strategy/dp_adaptive_clipping.py
index dc5254b403e2..b25e1efdf0e9 100644
--- a/src/py/flwr/server/strategy/dp_adaptive_clipping.py
+++ b/src/py/flwr/server/strategy/dp_adaptive_clipping.py
@@ -467,4 +467,4 @@ def evaluate(
         self, server_round: int, parameters: Parameters
     ) -> Optional[Tuple[float, Dict[str, Scalar]]]:
         """Evaluate model parameters using an evaluation function from the strategy."""
-        return self.strategy.evaluate(server_round, parameters)
\ No newline at end of file
+        return self.strategy.evaluate(server_round, parameters)
diff --git a/src/py/flwr/server/strategy/dp_fixed_clipping.py b/src/py/flwr/server/strategy/dp_fixed_clipping.py
index 37be10b20917..92b2845fd846 100644
--- a/src/py/flwr/server/strategy/dp_fixed_clipping.py
+++ b/src/py/flwr/server/strategy/dp_fixed_clipping.py
@@ -358,4 +358,4 @@ def evaluate(
         self, server_round: int, parameters: Parameters
     ) -> Optional[Tuple[float, Dict[str, Scalar]]]:
         """Evaluate model parameters using an evaluation function from the strategy."""
-        return self.strategy.evaluate(server_round, parameters)
\ No newline at end of file
+        return self.strategy.evaluate(server_round, parameters)
diff --git a/src/py/flwr/server/strategy/dpfedavg_adaptive.py b/src/py/flwr/server/strategy/dpfedavg_adaptive.py
index f49b331c3ad8..a908679ed668 100644
--- a/src/py/flwr/server/strategy/dpfedavg_adaptive.py
+++ b/src/py/flwr/server/strategy/dpfedavg_adaptive.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -126,4 +126,4 @@ def aggregate_fit(
             return None, {}
         new_global_model = super().aggregate_fit(server_round, results, failures)
         self._update_clip_norm(results)
-        return new_global_model
\ No newline at end of file
+        return new_global_model
diff --git a/src/py/flwr/server/strategy/dpfedavg_fixed.py b/src/py/flwr/server/strategy/dpfedavg_fixed.py
index 552467f281d9..c54379fc7087 100644
--- a/src/py/flwr/server/strategy/dpfedavg_fixed.py
+++ b/src/py/flwr/server/strategy/dpfedavg_fixed.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -178,4 +178,4 @@ def evaluate(
         self, server_round: int, parameters: Parameters
     ) -> Optional[Tuple[float, Dict[str, Scalar]]]:
         """Evaluate model parameters using an evaluation function from the strategy."""
-        return self.strategy.evaluate(server_round, parameters)
\ No newline at end of file
+        return self.strategy.evaluate(server_round, parameters)
diff --git a/src/py/flwr/server/strategy/fault_tolerant_fedavg.py b/src/py/flwr/server/strategy/fault_tolerant_fedavg.py
index acfa13873f46..663ac8872c39 100644
--- a/src/py/flwr/server/strategy/fault_tolerant_fedavg.py
+++ b/src/py/flwr/server/strategy/fault_tolerant_fedavg.py
@@ -145,4 +145,4 @@ def aggregate_evaluate(
         elif server_round == 1:  # Only log this warning once
             log(WARNING, "No evaluate_metrics_aggregation_fn provided")
 
-        return loss_aggregated, metrics_aggregated
\ No newline at end of file
+        return loss_aggregated, metrics_aggregated
diff --git a/src/py/flwr/server/strategy/fault_tolerant_fedavg_test.py b/src/py/flwr/server/strategy/fault_tolerant_fedavg_test.py
index 25f692bfd793..98f4cac032cb 100644
--- a/src/py/flwr/server/strategy/fault_tolerant_fedavg_test.py
+++ b/src/py/flwr/server/strategy/fault_tolerant_fedavg_test.py
@@ -251,4 +251,4 @@ def test_aggregate_evaluate_no_failures() -> None:
     actual, _ = strategy.aggregate_evaluate(1, results, failures)
 
     # Assert
-    assert actual == expected
\ No newline at end of file
+    assert actual == expected
diff --git a/src/py/flwr/server/strategy/fedadagrad.py b/src/py/flwr/server/strategy/fedadagrad.py
index e63c092910ea..4a8f52d98e18 100644
--- a/src/py/flwr/server/strategy/fedadagrad.py
+++ b/src/py/flwr/server/strategy/fedadagrad.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -168,4 +168,4 @@ def aggregate_fit(
 
         self.current_weights = new_weights
 
-        return ndarrays_to_parameters(self.current_weights), metrics_aggregated
\ No newline at end of file
+        return ndarrays_to_parameters(self.current_weights), metrics_aggregated
diff --git a/src/py/flwr/server/strategy/fedadagrad_test.py b/src/py/flwr/server/strategy/fedadagrad_test.py
index 9229792de819..0c966442ecaf 100644
--- a/src/py/flwr/server/strategy/fedadagrad_test.py
+++ b/src/py/flwr/server/strategy/fedadagrad_test.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -83,4 +83,4 @@ def test_aggregate_fit() -> None:
     if actual_aggregated:
         actual_list = parameters_to_ndarrays(actual_aggregated)
         actual = actual_list[0]
-    assert (actual == expected[0]).all()
\ No newline at end of file
+    assert (actual == expected[0]).all()
diff --git a/src/py/flwr/server/strategy/fedadam.py b/src/py/flwr/server/strategy/fedadam.py
index e1d5eb06c785..8a47cf0dd8ac 100644
--- a/src/py/flwr/server/strategy/fedadam.py
+++ b/src/py/flwr/server/strategy/fedadam.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -177,4 +177,4 @@ def aggregate_fit(
 
         self.current_weights = new_weights
 
-        return ndarrays_to_parameters(self.current_weights), metrics_aggregated
\ No newline at end of file
+        return ndarrays_to_parameters(self.current_weights), metrics_aggregated
diff --git a/src/py/flwr/server/strategy/fedavg.py b/src/py/flwr/server/strategy/fedavg.py
index 35b08e1059b7..3b9b2640c2b5 100644
--- a/src/py/flwr/server/strategy/fedavg.py
+++ b/src/py/flwr/server/strategy/fedavg.py
@@ -282,4 +282,4 @@ def aggregate_evaluate(
         elif server_round == 1:  # Only log this warning once
             log(WARNING, "No evaluate_metrics_aggregation_fn provided")
 
-        return loss_aggregated, metrics_aggregated
\ No newline at end of file
+        return loss_aggregated, metrics_aggregated
diff --git a/src/py/flwr/server/strategy/fedavg_android.py b/src/py/flwr/server/strategy/fedavg_android.py
index 04cf6ac1bd85..6678b7ced114 100644
--- a/src/py/flwr/server/strategy/fedavg_android.py
+++ b/src/py/flwr/server/strategy/fedavg_android.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -241,4 +241,4 @@ def ndarray_to_bytes(self, ndarray: NDArray) -> bytes:
     def bytes_to_ndarray(self, tensor: bytes) -> NDArray:
         """Deserialize NumPy array from bytes."""
         ndarray_deserialized = np.frombuffer(tensor, dtype=np.float32)
-        return cast(NDArray, ndarray_deserialized)
\ No newline at end of file
+        return cast(NDArray, ndarray_deserialized)
diff --git a/src/py/flwr/server/strategy/fedavg_test.py b/src/py/flwr/server/strategy/fedavg_test.py
index 7b7757a0cdb7..e62eaa5c5832 100644
--- a/src/py/flwr/server/strategy/fedavg_test.py
+++ b/src/py/flwr/server/strategy/fedavg_test.py
@@ -177,4 +177,4 @@ def test_inplace_aggregate_fit_equivalence() -> None:
 
     # Assert
     for ref, inp in zip(reference_np, inplace_np):
-        assert_allclose(ref, inp)
\ No newline at end of file
+        assert_allclose(ref, inp)
diff --git a/src/py/flwr/server/strategy/fedavgm.py b/src/py/flwr/server/strategy/fedavgm.py
index a20176e7799f..fb9261abe89d 100644
--- a/src/py/flwr/server/strategy/fedavgm.py
+++ b/src/py/flwr/server/strategy/fedavgm.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -197,4 +197,4 @@ def aggregate_fit(
         elif server_round == 1:  # Only log this warning once
             log(WARNING, "No fit_metrics_aggregation_fn provided")
 
-        return parameters_aggregated, metrics_aggregated
\ No newline at end of file
+        return parameters_aggregated, metrics_aggregated
diff --git a/src/py/flwr/server/strategy/fedavgm_test.py b/src/py/flwr/server/strategy/fedavgm_test.py
index c2aa7324b52e..a0e942171627 100644
--- a/src/py/flwr/server/strategy/fedavgm_test.py
+++ b/src/py/flwr/server/strategy/fedavgm_test.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -136,4 +136,4 @@ def test_aggregate_fit_server_learning_rate_and_momentum() -> None:
     # Assert
     assert actual
     for w_act, w_exp in zip(parameters_to_ndarrays(actual), expected):
-        assert_almost_equal(w_act, w_exp)
\ No newline at end of file
+        assert_almost_equal(w_act, w_exp)
diff --git a/src/py/flwr/server/strategy/fedmedian.py b/src/py/flwr/server/strategy/fedmedian.py
index 1012eaf93975..17e979d92beb 100644
--- a/src/py/flwr/server/strategy/fedmedian.py
+++ b/src/py/flwr/server/strategy/fedmedian.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -73,4 +73,4 @@ def aggregate_fit(
         elif server_round == 1:  # Only log this warning once
             log(WARNING, "No fit_metrics_aggregation_fn provided")
 
-        return parameters_aggregated, metrics_aggregated
\ No newline at end of file
+        return parameters_aggregated, metrics_aggregated
diff --git a/src/py/flwr/server/strategy/fedmedian_test.py b/src/py/flwr/server/strategy/fedmedian_test.py
index 9c84d58f0df8..57cf08d8c01d 100644
--- a/src/py/flwr/server/strategy/fedmedian_test.py
+++ b/src/py/flwr/server/strategy/fedmedian_test.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -197,4 +197,4 @@ def test_aggregate_fit() -> None:
     if actual_aggregated:
         actual_list = parameters_to_ndarrays(actual_aggregated)
         actual = actual_list[0]
-    assert (actual == expected[0]).all()
\ No newline at end of file
+    assert (actual == expected[0]).all()
diff --git a/src/py/flwr/server/strategy/fedopt.py b/src/py/flwr/server/strategy/fedopt.py
index 5ec55004ef3e..be5f260d96fa 100644
--- a/src/py/flwr/server/strategy/fedopt.py
+++ b/src/py/flwr/server/strategy/fedopt.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -128,4 +128,4 @@ def __init__(
     def __repr__(self) -> str:
         """Compute a string representation of the strategy."""
         rep = f"FedOpt(accept_failures={self.accept_failures})"
-        return rep
\ No newline at end of file
+        return rep
diff --git a/src/py/flwr/server/strategy/fedprox.py b/src/py/flwr/server/strategy/fedprox.py
index a6cd638ff726..d20f578b193d 100644
--- a/src/py/flwr/server/strategy/fedprox.py
+++ b/src/py/flwr/server/strategy/fedprox.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -168,4 +168,4 @@ def configure_fit(
                 ),
             )
             for client, fit_ins in client_config_pairs
-        ]
\ No newline at end of file
+        ]
diff --git a/src/py/flwr/server/strategy/fedtrimmedavg.py b/src/py/flwr/server/strategy/fedtrimmedavg.py
index b59366187af9..96b0d35e7a61 100644
--- a/src/py/flwr/server/strategy/fedtrimmedavg.py
+++ b/src/py/flwr/server/strategy/fedtrimmedavg.py
@@ -141,4 +141,4 @@ def aggregate_fit(
         elif server_round == 1:  # Only log this warning once
             log(WARNING, "No fit_metrics_aggregation_fn provided")
 
-        return parameters_aggregated, metrics_aggregated
\ No newline at end of file
+        return parameters_aggregated, metrics_aggregated
diff --git a/src/py/flwr/server/strategy/fedxgb_bagging.py b/src/py/flwr/server/strategy/fedxgb_bagging.py
index 182682fd695b..a8e8adddafbb 100644
--- a/src/py/flwr/server/strategy/fedxgb_bagging.py
+++ b/src/py/flwr/server/strategy/fedxgb_bagging.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -166,4 +166,4 @@ def _get_tree_nums(xgb_model_org: bytes) -> Tuple[int, int]:
             "num_parallel_tree"
         ]
     )
-    return tree_num, paral_tree_num
\ No newline at end of file
+    return tree_num, paral_tree_num
diff --git a/src/py/flwr/server/strategy/fedxgb_cyclic.py b/src/py/flwr/server/strategy/fedxgb_cyclic.py
index 4b7fb837cea9..2605daab29f4 100644
--- a/src/py/flwr/server/strategy/fedxgb_cyclic.py
+++ b/src/py/flwr/server/strategy/fedxgb_cyclic.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -144,4 +144,4 @@ def configure_evaluate(
         sampled_clients = [clients[sampled_idx]]
 
         # Return client/config pairs
-        return [(client, evaluate_ins) for client in sampled_clients]
\ No newline at end of file
+        return [(client, evaluate_ins) for client in sampled_clients]
diff --git a/src/py/flwr/server/strategy/fedxgb_nn_avg.py b/src/py/flwr/server/strategy/fedxgb_nn_avg.py
index b477cfe0acfc..8dedc925f350 100644
--- a/src/py/flwr/server/strategy/fedxgb_nn_avg.py
+++ b/src/py/flwr/server/strategy/fedxgb_nn_avg.py
@@ -1,4 +1,4 @@
-# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -101,4 +101,4 @@ def aggregate_fit(
         elif server_round == 1:  # Only log this warning once
             log(WARNING, "No fit_metrics_aggregation_fn provided")
 
-        return [parameters_aggregated, trees_aggregated], metrics_aggregated
\ No newline at end of file
+        return [parameters_aggregated, trees_aggregated], metrics_aggregated
diff --git a/src/py/flwr/server/strategy/fedyogi.py b/src/py/flwr/server/strategy/fedyogi.py
index e30f48c471c0..7c77aab7ae73 100644
--- a/src/py/flwr/server/strategy/fedyogi.py
+++ b/src/py/flwr/server/strategy/fedyogi.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -177,4 +177,4 @@ def aggregate_fit(
 
         self.current_weights = new_weights
 
-        return ndarrays_to_parameters(self.current_weights), metrics_aggregated
\ No newline at end of file
+        return ndarrays_to_parameters(self.current_weights), metrics_aggregated
diff --git a/src/py/flwr/server/strategy/krum.py b/src/py/flwr/server/strategy/krum.py
index 25764bda0d42..16eb5212940e 100644
--- a/src/py/flwr/server/strategy/krum.py
+++ b/src/py/flwr/server/strategy/krum.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -152,4 +152,4 @@ def aggregate_fit(
         elif server_round == 1:  # Only log this warning once
             log(WARNING, "No fit_metrics_aggregation_fn provided")
 
-        return parameters_aggregated, metrics_aggregated
\ No newline at end of file
+        return parameters_aggregated, metrics_aggregated
diff --git a/src/py/flwr/server/strategy/krum_test.py b/src/py/flwr/server/strategy/krum_test.py
index e1175c87c3b6..653dc9a8475d 100644
--- a/src/py/flwr/server/strategy/krum_test.py
+++ b/src/py/flwr/server/strategy/krum_test.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -198,4 +198,4 @@ def test_aggregate_fit() -> None:
     if actual_aggregated:
         actual_list = parameters_to_ndarrays(actual_aggregated)
         actual = actual_list[0]
-    assert (actual == expected[0]).all()
\ No newline at end of file
+    assert (actual == expected[0]).all()
diff --git a/src/py/flwr/server/strategy/multikrum_test.py b/src/py/flwr/server/strategy/multikrum_test.py
index d19725018f36..f874dc2f9800 100644
--- a/src/py/flwr/server/strategy/multikrum_test.py
+++ b/src/py/flwr/server/strategy/multikrum_test.py
@@ -1,4 +1,4 @@
-# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -97,4 +97,4 @@ def test_aggregate_fit() -> None:
     if actual_aggregated:
         actual_list = parameters_to_ndarrays(actual_aggregated)
         actual = actual_list[0]
-    assert (actual == expected[0]).all()
\ No newline at end of file
+    assert (actual == expected[0]).all()
diff --git a/src/py/flwr/server/strategy/qfedavg.py b/src/py/flwr/server/strategy/qfedavg.py
index 114ac548fa79..758e8e608e9f 100644
--- a/src/py/flwr/server/strategy/qfedavg.py
+++ b/src/py/flwr/server/strategy/qfedavg.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -255,4 +255,4 @@ def aggregate_evaluate(
         elif server_round == 1:  # Only log this warning once
             log(WARNING, "No evaluate_metrics_aggregation_fn provided")
 
-        return loss_aggregated, metrics_aggregated
\ No newline at end of file
+        return loss_aggregated, metrics_aggregated
diff --git a/src/py/flwr/server/strategy/strategy.py b/src/py/flwr/server/strategy/strategy.py
index 08d1f76aef7a..cfdfe2e246c5 100644
--- a/src/py/flwr/server/strategy/strategy.py
+++ b/src/py/flwr/server/strategy/strategy.py
@@ -182,4 +182,4 @@ def evaluate(
         evaluation_result : Optional[Tuple[float, Dict[str, Scalar]]]
             The evaluation result, usually a Tuple containing loss and a
             dictionary containing task-specific metrics (e.g., accuracy).
-        """
\ No newline at end of file
+        """
diff --git a/src/py/flwr/server/superlink/__init__.py b/src/py/flwr/server/superlink/__init__.py
index 2c2bdf394437..94102100de26 100644
--- a/src/py/flwr/server/superlink/__init__.py
+++ b/src/py/flwr/server/superlink/__init__.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Flower SuperLink."""
\ No newline at end of file
+"""Flower SuperLink."""
diff --git a/src/py/flwr/server/superlink/driver/__init__.py b/src/py/flwr/server/superlink/driver/__init__.py
index 864a23932f73..2bfe63e6065f 100644
--- a/src/py/flwr/server/superlink/driver/__init__.py
+++ b/src/py/flwr/server/superlink/driver/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Flower driver service."""
\ No newline at end of file
+"""Flower driver service."""
diff --git a/src/py/flwr/server/superlink/driver/driver_grpc.py b/src/py/flwr/server/superlink/driver/driver_grpc.py
index 6ec57940fc8d..f74000bc59c4 100644
--- a/src/py/flwr/server/superlink/driver/driver_grpc.py
+++ b/src/py/flwr/server/superlink/driver/driver_grpc.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -51,4 +51,4 @@ def run_driver_api_grpc(
     log(INFO, "Flower ECE: Starting Driver API (gRPC-rere) on %s", address)
     driver_grpc_server.start()
 
-    return driver_grpc_server
\ No newline at end of file
+    return driver_grpc_server
diff --git a/src/py/flwr/server/superlink/driver/driver_servicer.py b/src/py/flwr/server/superlink/driver/driver_servicer.py
index 8ea23da22c15..e808616af778 100644
--- a/src/py/flwr/server/superlink/driver/driver_servicer.py
+++ b/src/py/flwr/server/superlink/driver/driver_servicer.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -139,4 +139,4 @@ def GetRun(
 
 def _raise_if(validation_error: bool, detail: str) -> None:
     if validation_error:
-        raise ValueError(f"Malformed PushTaskInsRequest: {detail}")
\ No newline at end of file
+        raise ValueError(f"Malformed PushTaskInsRequest: {detail}")
diff --git a/src/py/flwr/server/superlink/driver/driver_servicer_test.py b/src/py/flwr/server/superlink/driver/driver_servicer_test.py
index 5efb03040402..99f7cc007a89 100644
--- a/src/py/flwr/server/superlink/driver/driver_servicer_test.py
+++ b/src/py/flwr/server/superlink/driver/driver_servicer_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -53,4 +53,4 @@ def test_raise_if_true() -> None:
     except ValueError as err:
         assert str(err) == "Malformed PushTaskInsRequest: test"
     except Exception as err:
-        raise AssertionError() from err
\ No newline at end of file
+        raise AssertionError() from err
diff --git a/src/py/flwr/server/superlink/fleet/__init__.py b/src/py/flwr/server/superlink/fleet/__init__.py
index b89134921e3e..d3c3ef90163d 100644
--- a/src/py/flwr/server/superlink/fleet/__init__.py
+++ b/src/py/flwr/server/superlink/fleet/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Flower fleet service."""
\ No newline at end of file
+"""Flower fleet service."""
diff --git a/src/py/flwr/server/superlink/fleet/grpc_adapter/__init__.py b/src/py/flwr/server/superlink/fleet/grpc_adapter/__init__.py
index ae2772f30b87..cf875a1b9666 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_adapter/__init__.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_adapter/__init__.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Server-side part of the GrpcAdapter transport layer."""
\ No newline at end of file
+"""Server-side part of the GrpcAdapter transport layer."""
diff --git a/src/py/flwr/server/superlink/fleet/grpc_adapter/grpc_adapter_servicer.py b/src/py/flwr/server/superlink/fleet/grpc_adapter/grpc_adapter_servicer.py
index 1fc2891cc9f9..9325041061ac 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_adapter/grpc_adapter_servicer.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_adapter/grpc_adapter_servicer.py
@@ -128,4 +128,4 @@ def _get_run(self, request: GetRunRequest) -> GetRunResponse:
         return message_handler.get_run(
             request=request,
             state=self.state_factory.state(),
-        )
\ No newline at end of file
+        )
diff --git a/src/py/flwr/server/superlink/fleet/grpc_bidi/__init__.py b/src/py/flwr/server/superlink/fleet/grpc_bidi/__init__.py
index 419402aaef40..bae8bc431edd 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_bidi/__init__.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_bidi/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Server-side part of the gRPC transport layer."""
\ No newline at end of file
+"""Server-side part of the gRPC transport layer."""
diff --git a/src/py/flwr/server/superlink/fleet/grpc_bidi/flower_service_servicer.py b/src/py/flwr/server/superlink/fleet/grpc_bidi/flower_service_servicer.py
index 66607964fb40..6f94ea844e38 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_bidi/flower_service_servicer.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_bidi/flower_service_servicer.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -145,4 +145,4 @@ def Join(  # pylint: disable=invalid-name
                         res_wrapper=ResWrapper(client_message=client_message)
                     )
                 except StopIteration:
-                    break
\ No newline at end of file
+                    break
diff --git a/src/py/flwr/server/superlink/fleet/grpc_bidi/flower_service_servicer_test.py b/src/py/flwr/server/superlink/fleet/grpc_bidi/flower_service_servicer_test.py
index ff31f1d50b44..bd93554a6a32 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_bidi/flower_service_servicer_test.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_bidi/flower_service_servicer_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -141,4 +141,4 @@ def test_join(self) -> None:
 
 
 if __name__ == "__main__":
-    unittest.main(verbosity=2)
\ No newline at end of file
+    unittest.main(verbosity=2)
diff --git a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_bridge.py b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_bridge.py
index 13028bc47adc..d5b4a915c609 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_bridge.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_bridge.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -186,4 +186,4 @@ def set_res_wrapper(self, res_wrapper: ResWrapper) -> None:
                 raise ValueError("This should not happen")
 
             self._res_wrapper = res_wrapper  # Write
-            self._transition(Status.RES_WRAPPER_AVAILABLE)
\ No newline at end of file
+            self._transition(Status.RES_WRAPPER_AVAILABLE)
diff --git a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_bridge_test.py b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_bridge_test.py
index 12f3abf5ff2d..f7c236acd7a1 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_bridge_test.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_bridge_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -176,4 +176,4 @@ def close_bridge_delayed(secs: int) -> None:
 
     # Assert
     assert len(client_messages_received) == 2
-    assert isinstance(raised_error, GrpcBridgeClosed)
\ No newline at end of file
+    assert isinstance(raised_error, GrpcBridgeClosed)
diff --git a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_client_proxy.py b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_client_proxy.py
index ee80673b868f..ac62ad014950 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_client_proxy.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_client_proxy.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -135,4 +135,4 @@ def reconnect(
         )
         client_msg: ClientMessage = res_wrapper.client_message
         disconnect = serde.disconnect_res_from_proto(client_msg.disconnect_res)
-        return disconnect
\ No newline at end of file
+        return disconnect
diff --git a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_client_proxy_test.py b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_client_proxy_test.py
index 5b81c749df5a..e7077dfd39ae 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_client_proxy_test.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_client_proxy_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -132,4 +132,4 @@ def test_get_properties(self) -> None:
         )
 
         # Assert
-        assert value.properties["tensor_type"] == "numpy.ndarray"
\ No newline at end of file
+        assert value.properties["tensor_type"] == "numpy.ndarray"
diff --git a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_server.py b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_server.py
index 84a4928ededd..6aeaa7ef413f 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_server.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_server.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -274,4 +274,4 @@ def generic_create_grpc_server(  # pylint: disable=too-many-arguments
     else:
         server.add_insecure_port(server_address)
 
-    return server
\ No newline at end of file
+    return server
diff --git a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_server_test.py b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_server_test.py
index a2d969bfcf98..8afa37515950 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_server_test.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_bidi/grpc_server_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -115,4 +115,4 @@ def test_integration_start_and_shutdown_secure_server() -> None:
     )
 
     # Teardown
-    server.stop(1)
\ No newline at end of file
+    server.stop(1)
diff --git a/src/py/flwr/server/superlink/fleet/grpc_rere/__init__.py b/src/py/flwr/server/superlink/fleet/grpc_rere/__init__.py
index 8e8b89a15cbf..61ab71d91400 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_rere/__init__.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_rere/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Server-side part of the gRPC transport layer using Request-Response."""
\ No newline at end of file
+"""Server-side part of the gRPC transport layer using Request-Response."""
diff --git a/src/py/flwr/server/superlink/fleet/grpc_rere/fleet_servicer.py b/src/py/flwr/server/superlink/fleet/grpc_rere/fleet_servicer.py
index 71498039f5bc..13e024eb31e4 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_rere/fleet_servicer.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_rere/fleet_servicer.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -100,4 +100,4 @@ def GetRun(
         return message_handler.get_run(
             request=request,
             state=self.state_factory.state(),
-        )
\ No newline at end of file
+        )
diff --git a/src/py/flwr/server/superlink/fleet/grpc_rere/server_interceptor.py b/src/py/flwr/server/superlink/fleet/grpc_rere/server_interceptor.py
index c4ce5336b6fb..21e9c44907cd 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_rere/server_interceptor.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_rere/server_interceptor.py
@@ -211,4 +211,4 @@ def _create_authenticated_node(
         # Handle `CreateNode` here instead of calling the default method handler
         # Note: the innermost `CreateNode` method will never be called
         node_id = self.state.create_node(request.ping_interval, public_key_bytes)
-        return CreateNodeResponse(node=Node(node_id=node_id, anonymous=False))
\ No newline at end of file
+        return CreateNodeResponse(node=Node(node_id=node_id, anonymous=False))
diff --git a/src/py/flwr/server/superlink/fleet/grpc_rere/server_interceptor_test.py b/src/py/flwr/server/superlink/fleet/grpc_rere/server_interceptor_test.py
index bf8c516224d3..01499102b7d8 100644
--- a/src/py/flwr/server/superlink/fleet/grpc_rere/server_interceptor_test.py
+++ b/src/py/flwr/server/superlink/fleet/grpc_rere/server_interceptor_test.py
@@ -497,4 +497,4 @@ def test_successful_restore_node(self) -> None:
 
         assert call.initial_metadata()[0] == expected_metadata
         assert isinstance(response, CreateNodeResponse)
-        assert response.node.node_id == client_node_id
\ No newline at end of file
+        assert response.node.node_id == client_node_id
diff --git a/src/py/flwr/server/superlink/fleet/message_handler/__init__.py b/src/py/flwr/server/superlink/fleet/message_handler/__init__.py
index c48f4bcef916..18b0f11fa6c5 100644
--- a/src/py/flwr/server/superlink/fleet/message_handler/__init__.py
+++ b/src/py/flwr/server/superlink/fleet/message_handler/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Shared request-response message handlers."""
\ No newline at end of file
+"""Shared request-response message handlers."""
diff --git a/src/py/flwr/server/superlink/fleet/message_handler/message_handler.py b/src/py/flwr/server/superlink/fleet/message_handler/message_handler.py
index b180f49dc577..dceb18cab453 100644
--- a/src/py/flwr/server/superlink/fleet/message_handler/message_handler.py
+++ b/src/py/flwr/server/superlink/fleet/message_handler/message_handler.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -114,4 +114,4 @@ def get_run(
     """Get run information."""
     run = state.get_run(request.run_id)
     run_proto = None if run is None else Run(**vars(run))
-    return GetRunResponse(run=run_proto)
\ No newline at end of file
+    return GetRunResponse(run=run_proto)
diff --git a/src/py/flwr/server/superlink/fleet/message_handler/message_handler_test.py b/src/py/flwr/server/superlink/fleet/message_handler/message_handler_test.py
index acdc732e9813..c135f6fb7b61 100644
--- a/src/py/flwr/server/superlink/fleet/message_handler/message_handler_test.py
+++ b/src/py/flwr/server/superlink/fleet/message_handler/message_handler_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -125,4 +125,4 @@ def test_push_task_res() -> None:
     state.store_task_ins.assert_not_called()
     state.get_task_ins.assert_not_called()
     state.store_task_res.assert_called_once()
-    state.get_task_res.assert_not_called()
\ No newline at end of file
+    state.get_task_res.assert_not_called()
diff --git a/src/py/flwr/server/superlink/fleet/rest_rere/__init__.py b/src/py/flwr/server/superlink/fleet/rest_rere/__init__.py
index 0360ca524b3a..a926f9ca0bfc 100644
--- a/src/py/flwr/server/superlink/fleet/rest_rere/__init__.py
+++ b/src/py/flwr/server/superlink/fleet/rest_rere/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Server-side part of the REST transport layer."""
\ No newline at end of file
+"""Server-side part of the REST transport layer."""
diff --git a/src/py/flwr/server/superlink/fleet/rest_rere/rest_api.py b/src/py/flwr/server/superlink/fleet/rest_rere/rest_api.py
index e9bff8fc9869..c7ff496d39bf 100644
--- a/src/py/flwr/server/superlink/fleet/rest_rere/rest_api.py
+++ b/src/py/flwr/server/superlink/fleet/rest_rere/rest_api.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -232,4 +232,4 @@ def _check_headers(headers: Headers) -> None:
     if "accept" not in headers:
         raise HTTPException(status_code=400, detail="Missing header `Accept`")
     if headers["accept"] != "application/protobuf":
-        raise HTTPException(status_code=400, detail="Unsupported `Accept`")
\ No newline at end of file
+        raise HTTPException(status_code=400, detail="Unsupported `Accept`")
diff --git a/src/py/flwr/server/superlink/fleet/vce/__init__.py b/src/py/flwr/server/superlink/fleet/vce/__init__.py
index 23992c5cbe2f..57d39688b527 100644
--- a/src/py/flwr/server/superlink/fleet/vce/__init__.py
+++ b/src/py/flwr/server/superlink/fleet/vce/__init__.py
@@ -18,4 +18,4 @@
 
 __all__ = [
     "start_vce",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/server/superlink/fleet/vce/backend/__init__.py b/src/py/flwr/server/superlink/fleet/vce/backend/__init__.py
index 3b8e081a2140..d751cf4bcae1 100644
--- a/src/py/flwr/server/superlink/fleet/vce/backend/__init__.py
+++ b/src/py/flwr/server/superlink/fleet/vce/backend/__init__.py
@@ -45,4 +45,4 @@
 __all__ = [
     "Backend",
     "BackendConfig",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/server/superlink/fleet/vce/backend/backend.py b/src/py/flwr/server/superlink/fleet/vce/backend/backend.py
index 42055731229e..1d5e3a6a51ad 100644
--- a/src/py/flwr/server/superlink/fleet/vce/backend/backend.py
+++ b/src/py/flwr/server/superlink/fleet/vce/backend/backend.py
@@ -64,4 +64,4 @@ async def process_message(
         message: Message,
         context: Context,
     ) -> Tuple[Message, Context]:
-        """Submit a job to the backend."""
\ No newline at end of file
+        """Submit a job to the backend."""
diff --git a/src/py/flwr/server/superlink/fleet/vce/backend/raybackend.py b/src/py/flwr/server/superlink/fleet/vce/backend/raybackend.py
index 1c8d4709eaad..93aca583af9c 100644
--- a/src/py/flwr/server/superlink/fleet/vce/backend/raybackend.py
+++ b/src/py/flwr/server/superlink/fleet/vce/backend/raybackend.py
@@ -181,4 +181,4 @@ async def terminate(self) -> None:
         """Terminate all actors in actor pool."""
         await self.pool.terminate_all_actors()
         ray.shutdown()
-        log(DEBUG, "Terminated %s", self.__class__.__name__)
\ No newline at end of file
+        log(DEBUG, "Terminated %s", self.__class__.__name__)
diff --git a/src/py/flwr/server/superlink/fleet/vce/backend/raybackend_test.py b/src/py/flwr/server/superlink/fleet/vce/backend/raybackend_test.py
index c9fe91868d8c..dcac0b81d666 100644
--- a/src/py/flwr/server/superlink/fleet/vce/backend/raybackend_test.py
+++ b/src/py/flwr/server/superlink/fleet/vce/backend/raybackend_test.py
@@ -214,4 +214,4 @@ def test_backend_creation_submit_and_termination_existing_client_app_unsetworkdi
                 client_app_loader=_load_from_module("raybackend_test:client_app"),
                 workdir="/?&%$^#%@$!",
             )
-        self.addAsyncCleanup(self.on_cleanup)
\ No newline at end of file
+        self.addAsyncCleanup(self.on_cleanup)
diff --git a/src/py/flwr/server/superlink/fleet/vce/vce_api.py b/src/py/flwr/server/superlink/fleet/vce/vce_api.py
index 475eeeffed3d..3c9628a6d2a3 100644
--- a/src/py/flwr/server/superlink/fleet/vce/vce_api.py
+++ b/src/py/flwr/server/superlink/fleet/vce/vce_api.py
@@ -364,4 +364,4 @@ def _load() -> ClientApp:
         f_stop.set()  # set termination event
         raise loadapp_ex
     except Exception as ex:
-        raise ex
\ No newline at end of file
+        raise ex
diff --git a/src/py/flwr/server/superlink/fleet/vce/vce_api_test.py b/src/py/flwr/server/superlink/fleet/vce/vce_api_test.py
index 65d59a4b9ada..df9f2cc96f95 100644
--- a/src/py/flwr/server/superlink/fleet/vce/vce_api_test.py
+++ b/src/py/flwr/server/superlink/fleet/vce/vce_api_test.py
@@ -274,4 +274,4 @@ def test_start_and_shutdown_with_tasks_in_state(self) -> None:
             assert (
                 content.configs_records["getpropertiesres.properties"]["result"]
                 == expected_results[UUID(task_res.task.ancestry[0])]
-            )
\ No newline at end of file
+            )
diff --git a/src/py/flwr/server/superlink/state/__init__.py b/src/py/flwr/server/superlink/state/__init__.py
index 2763aa97d1ec..7f260d733bbe 100644
--- a/src/py/flwr/server/superlink/state/__init__.py
+++ b/src/py/flwr/server/superlink/state/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -25,4 +25,4 @@
     "SqliteState",
     "State",
     "StateFactory",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/server/superlink/state/in_memory_state.py b/src/py/flwr/server/superlink/state/in_memory_state.py
index e4f81c3a9e4b..e03260355db9 100644
--- a/src/py/flwr/server/superlink/state/in_memory_state.py
+++ b/src/py/flwr/server/superlink/state/in_memory_state.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -336,4 +336,4 @@ def acknowledge_ping(self, node_id: int, ping_interval: float) -> bool:
             if node_id in self.node_ids:
                 self.node_ids[node_id] = (time.time() + ping_interval, ping_interval)
                 return True
-        return False
\ No newline at end of file
+        return False
diff --git a/src/py/flwr/server/superlink/state/sqlite_state.py b/src/py/flwr/server/superlink/state/sqlite_state.py
index 919ba149598b..b9672757b0e6 100644
--- a/src/py/flwr/server/superlink/state/sqlite_state.py
+++ b/src/py/flwr/server/superlink/state/sqlite_state.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2023 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -816,4 +816,4 @@ def dict_to_task_res(task_dict: Dict[str, Any]) -> TaskRes:
             recordset=recordset,
         ),
     )
-    return result
\ No newline at end of file
+    return result
diff --git a/src/py/flwr/server/superlink/state/sqlite_state_test.py b/src/py/flwr/server/superlink/state/sqlite_state_test.py
index e21591da2625..20927df1cf12 100644
--- a/src/py/flwr/server/superlink/state/sqlite_state_test.py
+++ b/src/py/flwr/server/superlink/state/sqlite_state_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -54,4 +54,4 @@ def test_ins_res_to_dict(self) -> None:
 
 
 if __name__ == "__main__":
-    unittest.main(verbosity=2)
\ No newline at end of file
+    unittest.main(verbosity=2)
diff --git a/src/py/flwr/server/superlink/state/state.py b/src/py/flwr/server/superlink/state/state.py
index cabb8874400a..d1fc9465c9f2 100644
--- a/src/py/flwr/server/superlink/state/state.py
+++ b/src/py/flwr/server/superlink/state/state.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -221,4 +221,4 @@ def acknowledge_ping(self, node_id: int, ping_interval: float) -> bool:
         -------
         is_acknowledged : bool
             True if the ping is successfully acknowledged; otherwise, False.
-        """
\ No newline at end of file
+        """
diff --git a/src/py/flwr/server/superlink/state/state_factory.py b/src/py/flwr/server/superlink/state/state_factory.py
index d9e4c7fc2e51..62a00d910828 100644
--- a/src/py/flwr/server/superlink/state/state_factory.py
+++ b/src/py/flwr/server/superlink/state/state_factory.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2022 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -45,4 +45,4 @@ def state(self) -> State:
         state = SqliteState(self.database)
         state.initialize()
         log(DEBUG, "Using SqliteState")
-        return state
\ No newline at end of file
+        return state
diff --git a/src/py/flwr/server/superlink/state/state_test.py b/src/py/flwr/server/superlink/state/state_test.py
index e75746137277..81307d938400 100644
--- a/src/py/flwr/server/superlink/state/state_test.py
+++ b/src/py/flwr/server/superlink/state/state_test.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -779,4 +779,4 @@ def test_initialize(self) -> None:
 
 
 if __name__ == "__main__":
-    unittest.main(verbosity=2)
\ No newline at end of file
+    unittest.main(verbosity=2)
diff --git a/src/py/flwr/server/superlink/state/utils.py b/src/py/flwr/server/superlink/state/utils.py
index 95d68d5419bf..233a90946cc7 100644
--- a/src/py/flwr/server/superlink/state/utils.py
+++ b/src/py/flwr/server/superlink/state/utils.py
@@ -53,4 +53,4 @@ def make_node_unavailable_taskres(ref_taskins: TaskIns) -> TaskRes:
                 code=ErrorCode.NODE_UNAVAILABLE, reason=NODE_UNAVAILABLE_ERROR_REASON
             ),
         ),
-    )
\ No newline at end of file
+    )
diff --git a/src/py/flwr/server/typing.py b/src/py/flwr/server/typing.py
index b68a927fdb14..01143af74392 100644
--- a/src/py/flwr/server/typing.py
+++ b/src/py/flwr/server/typing.py
@@ -22,4 +22,4 @@
 from .driver import Driver
 
 ServerAppCallable = Callable[[Driver, Context], None]
-Workflow = Callable[[Driver, Context], None]
\ No newline at end of file
+Workflow = Callable[[Driver, Context], None]
diff --git a/src/py/flwr/server/utils/__init__.py b/src/py/flwr/server/utils/__init__.py
index cf6fcc3ad49b..c370716adaac 100644
--- a/src/py/flwr/server/utils/__init__.py
+++ b/src/py/flwr/server/utils/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -21,4 +21,4 @@
 __all__ = [
     "tensorboard",
     "validate_task_ins_or_res",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/server/utils/tensorboard.py b/src/py/flwr/server/utils/tensorboard.py
index 468ca8428fd2..3e8d1e62411e 100644
--- a/src/py/flwr/server/utils/tensorboard.py
+++ b/src/py/flwr/server/utils/tensorboard.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -148,4 +148,4 @@ def aggregate_evaluate(
 
         return cast(Strategy, TBWrapper)
 
-    return decorator
\ No newline at end of file
+    return decorator
diff --git a/src/py/flwr/server/utils/tensorboard_test.py b/src/py/flwr/server/utils/tensorboard_test.py
index 686584301f8c..1827a42cf6e6 100644
--- a/src/py/flwr/server/utils/tensorboard_test.py
+++ b/src/py/flwr/server/utils/tensorboard_test.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -27,4 +27,4 @@ def test_tensorboard() -> None:
         my_decorator = tensorboard(tmpdir)
 
     # Assert
-    assert callable(my_decorator)
\ No newline at end of file
+    assert callable(my_decorator)
diff --git a/src/py/flwr/server/utils/validator.py b/src/py/flwr/server/utils/validator.py
index de02223d3e7f..c0b0ec85761c 100644
--- a/src/py/flwr/server/utils/validator.py
+++ b/src/py/flwr/server/utils/validator.py
@@ -127,4 +127,4 @@ def validate_task_ins_or_res(tasks_ins_res: Union[TaskIns, TaskRes]) -> List[str
         if len(tasks_ins_res.task.ancestry) == 0:
             validation_errors.append("`ancestry` is empty")
 
-    return validation_errors
\ No newline at end of file
+    return validation_errors
diff --git a/src/py/flwr/server/utils/validator_test.py b/src/py/flwr/server/utils/validator_test.py
index c0363c60ee7e..61fe094c23d4 100644
--- a/src/py/flwr/server/utils/validator_test.py
+++ b/src/py/flwr/server/utils/validator_test.py
@@ -129,4 +129,4 @@ def create_task_res(
     )
 
     task_res.task.pushed_at = time.time()
-    return task_res
\ No newline at end of file
+    return task_res
diff --git a/src/py/flwr/server/workflow/__init__.py b/src/py/flwr/server/workflow/__init__.py
index 754bc33624a5..31dee89a185d 100644
--- a/src/py/flwr/server/workflow/__init__.py
+++ b/src/py/flwr/server/workflow/__init__.py
@@ -22,4 +22,4 @@
     "DefaultWorkflow",
     "SecAggPlusWorkflow",
     "SecAggWorkflow",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/server/workflow/constant.py b/src/py/flwr/server/workflow/constant.py
index 5b801ba23522..068e05b27e12 100644
--- a/src/py/flwr/server/workflow/constant.py
+++ b/src/py/flwr/server/workflow/constant.py
@@ -29,4 +29,4 @@ class Key:
 
     def __new__(cls) -> Key:
         """Prevent instantiation."""
-        raise TypeError(f"{cls.__name__} cannot be instantiated.")
\ No newline at end of file
+        raise TypeError(f"{cls.__name__} cannot be instantiated.")
diff --git a/src/py/flwr/server/workflow/default_workflows.py b/src/py/flwr/server/workflow/default_workflows.py
index 1f4a422237b8..80759316da84 100644
--- a/src/py/flwr/server/workflow/default_workflows.py
+++ b/src/py/flwr/server/workflow/default_workflows.py
@@ -386,4 +386,4 @@ def default_evaluate_workflow(driver: Driver, context: Context) -> None:
         )
         context.history.add_metrics_distributed(
             server_round=current_round, metrics=metrics_aggregated
-        )
\ No newline at end of file
+        )
diff --git a/src/py/flwr/server/workflow/secure_aggregation/__init__.py b/src/py/flwr/server/workflow/secure_aggregation/__init__.py
index 1ab533ccdb2d..25e2a32da334 100644
--- a/src/py/flwr/server/workflow/secure_aggregation/__init__.py
+++ b/src/py/flwr/server/workflow/secure_aggregation/__init__.py
@@ -21,4 +21,4 @@
 __all__ = [
     "SecAggPlusWorkflow",
     "SecAggWorkflow",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/server/workflow/secure_aggregation/secagg_workflow.py b/src/py/flwr/server/workflow/secure_aggregation/secagg_workflow.py
index 7fb557a32586..f56423e4a0d0 100644
--- a/src/py/flwr/server/workflow/secure_aggregation/secagg_workflow.py
+++ b/src/py/flwr/server/workflow/secure_aggregation/secagg_workflow.py
@@ -109,4 +109,4 @@ def __init__(  # pylint: disable=R0913
             quantization_range=quantization_range,
             modulus_range=modulus_range,
             timeout=timeout,
-        )
\ No newline at end of file
+        )
diff --git a/src/py/flwr/server/workflow/secure_aggregation/secaggplus_workflow.py b/src/py/flwr/server/workflow/secure_aggregation/secaggplus_workflow.py
index be3ad0f66bcc..d6d97c28f313 100644
--- a/src/py/flwr/server/workflow/secure_aggregation/secaggplus_workflow.py
+++ b/src/py/flwr/server/workflow/secure_aggregation/secaggplus_workflow.py
@@ -666,4 +666,4 @@ def make(nid: int) -> Message:
             context.history.add_metrics_distributed_fit(
                 server_round=current_round, metrics=metrics_aggregated
             )
-        return True
\ No newline at end of file
+        return True
diff --git a/src/py/flwr/simulation/__init__.py b/src/py/flwr/simulation/__init__.py
index ed00118a9e2f..3d648b14edba 100644
--- a/src/py/flwr/simulation/__init__.py
+++ b/src/py/flwr/simulation/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -39,4 +39,4 @@ def start_simulation(*args, **kwargs):  # type: ignore
 __all__ = [
     "run_simulation",
     "start_simulation",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/simulation/app.py b/src/py/flwr/simulation/app.py
index 401fc0792f19..4b4b7249ccd3 100644
--- a/src/py/flwr/simulation/app.py
+++ b/src/py/flwr/simulation/app.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -363,4 +363,4 @@ def update_resources(f_stop: threading.Event) -> None:
         f_stop.set()
         event(EventType.START_SIMULATION_LEAVE)
 
-    return hist
\ No newline at end of file
+    return hist
diff --git a/src/py/flwr/simulation/ray_transport/__init__.py b/src/py/flwr/simulation/ray_transport/__init__.py
index a8dc6ef2028d..0e82b75bb4b3 100644
--- a/src/py/flwr/simulation/ray_transport/__init__.py
+++ b/src/py/flwr/simulation/ray_transport/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-"""Ray-based Flower ClientProxy implementation."""
\ No newline at end of file
+"""Ray-based Flower ClientProxy implementation."""
diff --git a/src/py/flwr/simulation/ray_transport/ray_actor.py b/src/py/flwr/simulation/ray_transport/ray_actor.py
index 4afcb3249d64..9caf0fc3e6c0 100644
--- a/src/py/flwr/simulation/ray_transport/ray_actor.py
+++ b/src/py/flwr/simulation/ray_transport/ray_actor.py
@@ -487,4 +487,4 @@ async def fetch_result_and_return_actor_to_pool(
         # Retrieve result for object store
         # Instead of doing ray.get(future) we await it
         _, out_mssg, updated_context = await future
-        return out_mssg, updated_context
\ No newline at end of file
+        return out_mssg, updated_context
diff --git a/src/py/flwr/simulation/ray_transport/ray_client_proxy.py b/src/py/flwr/simulation/ray_transport/ray_client_proxy.py
index a28e9744dc58..5e344eb087ee 100644
--- a/src/py/flwr/simulation/ray_transport/ray_client_proxy.py
+++ b/src/py/flwr/simulation/ray_transport/ray_client_proxy.py
@@ -1,4 +1,4 @@
-# Copyright 2021 Flower Labs GmbH. All Rights Reserved.
+# Copyright 2020 Flower Labs GmbH. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -192,4 +192,4 @@ def reconnect(
         group_id: Optional[int],
     ) -> common.DisconnectRes:
         """Disconnect and (optionally) reconnect later."""
-        return common.DisconnectRes(reason="")  # Nothing to do here (yet)
\ No newline at end of file
+        return common.DisconnectRes(reason="")  # Nothing to do here (yet)
diff --git a/src/py/flwr/simulation/ray_transport/ray_client_proxy_test.py b/src/py/flwr/simulation/ray_transport/ray_client_proxy_test.py
index 7fc2d8debc28..9680b3846f1d 100644
--- a/src/py/flwr/simulation/ray_transport/ray_client_proxy_test.py
+++ b/src/py/flwr/simulation/ray_transport/ray_client_proxy_test.py
@@ -220,4 +220,4 @@ def _load_app() -> ClientApp:
         res = recordset_to_getpropertiesres(message_out.content)
         assert int(cid) * pi == res.properties["result"]
 
-    ray.shutdown()
\ No newline at end of file
+    ray.shutdown()
diff --git a/src/py/flwr/simulation/ray_transport/utils.py b/src/py/flwr/simulation/ray_transport/utils.py
index c9bff55f4d2a..3861164998a4 100644
--- a/src/py/flwr/simulation/ray_transport/utils.py
+++ b/src/py/flwr/simulation/ray_transport/utils.py
@@ -58,4 +58,4 @@ def enable_tf_gpu_growth() -> None:
             # Memory growth must be set before GPUs have been initialized
             log(ERROR, traceback.format_exc())
             log(ERROR, ex)
-            raise ex
\ No newline at end of file
+            raise ex
diff --git a/src/py/flwr/simulation/run_simulation.py b/src/py/flwr/simulation/run_simulation.py
index 0a4d527dc8d1..3532c5a4e877 100644
--- a/src/py/flwr/simulation/run_simulation.py
+++ b/src/py/flwr/simulation/run_simulation.py
@@ -436,4 +436,4 @@ def _parse_args_run_simulation() -> argparse.ArgumentParser:
         help="Sets the ID of the run started by the Simulation Engine.",
     )
 
-    return parser
\ No newline at end of file
+    return parser
diff --git a/src/py/flwr/superexec/__init__.py b/src/py/flwr/superexec/__init__.py
index efc89ce397a1..a510c41f4182 100644
--- a/src/py/flwr/superexec/__init__.py
+++ b/src/py/flwr/superexec/__init__.py
@@ -18,4 +18,4 @@
 
 __all__ = [
     "run_superexec",
-]
\ No newline at end of file
+]
diff --git a/src/py/flwr/superexec/app.py b/src/py/flwr/superexec/app.py
index c7c4f8bdb79c..fa89e83b5e75 100644
--- a/src/py/flwr/superexec/app.py
+++ b/src/py/flwr/superexec/app.py
@@ -175,4 +175,4 @@ def _load_executor(
 
 
 class LoadExecutorError(Exception):
-    """Error when trying to load `Executor`."""
\ No newline at end of file
+    """Error when trying to load `Executor`."""
diff --git a/src/py/flwr/superexec/exec_grpc.py b/src/py/flwr/superexec/exec_grpc.py
index 47cb3128dc75..127d5615dd84 100644
--- a/src/py/flwr/superexec/exec_grpc.py
+++ b/src/py/flwr/superexec/exec_grpc.py
@@ -48,4 +48,4 @@ def run_superexec_api_grpc(
     log(INFO, "Flower ECE: Starting SuperExec API (gRPC-rere) on %s", address)
     superexec_grpc_server.start()
 
-    return superexec_grpc_server
\ No newline at end of file
+    return superexec_grpc_server
diff --git a/src/py/flwr/superexec/exec_servicer.py b/src/py/flwr/superexec/exec_servicer.py
index 0926c625e3f5..e5ef2bd59a79 100644
--- a/src/py/flwr/superexec/exec_servicer.py
+++ b/src/py/flwr/superexec/exec_servicer.py
@@ -62,4 +62,4 @@ def StreamLogs(
         logs = ["a", "b", "c"]
         while context.is_active():
             for i in range(len(logs)):  # pylint: disable=C0200
-                yield StreamLogsResponse(log_output=logs[i])
\ No newline at end of file
+                yield StreamLogsResponse(log_output=logs[i])
diff --git a/src/py/flwr/superexec/exec_servicer_test.py b/src/py/flwr/superexec/exec_servicer_test.py
index 6e5f4b094b5d..41f67b74c48b 100644
--- a/src/py/flwr/superexec/exec_servicer_test.py
+++ b/src/py/flwr/superexec/exec_servicer_test.py
@@ -49,4 +49,4 @@ def test_start_run() -> None:
     # Execute
     response = servicer.StartRun(request, context_mock)
 
-    assert response.run_id == 10
\ No newline at end of file
+    assert response.run_id == 10
diff --git a/src/py/flwr/superexec/executor.py b/src/py/flwr/superexec/executor.py
index ec5785cfb174..f85ac4c157fc 100644
--- a/src/py/flwr/superexec/executor.py
+++ b/src/py/flwr/superexec/executor.py
@@ -51,4 +51,4 @@ def start_run(
         run_id : Optional[RunTracker]
             The run_id and the associated process of the run created by the SuperLink,
             or `None` if it fails.
-        """
\ No newline at end of file
+        """
diff --git a/src/py/flwr_tool/fix_copyright.py b/src/py/flwr_tool/fix_copyright.py
index 5d8995383607..c5c9eb42bf18 100755
--- a/src/py/flwr_tool/fix_copyright.py
+++ b/src/py/flwr_tool/fix_copyright.py
@@ -34,7 +34,7 @@ def _insert_or_edit_copyright(py_file: Path) -> None:
             lines = lines[end_index:]
 
         lines.insert(0, expected_copyright)
-    py_file.write_text("\n".join(lines), newline="\n")
+        py_file.write_text("\n".join(lines) + "\n")
 
 
 def _fix_copyright(dir_list: List[str]) -> None: