diff --git a/setup.py b/setup.py
index 9a9dd2b4..e41ee68d 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,5 @@
 """Packaging settings."""
+
 import os
 from codecs import open
 
diff --git a/substra/sdk/backends/local/compute/spawner/subprocess.py b/substra/sdk/backends/local/compute/spawner/subprocess.py
index 8bda7668..a474694d 100644
--- a/substra/sdk/backends/local/compute/spawner/subprocess.py
+++ b/substra/sdk/backends/local/compute/spawner/subprocess.py
@@ -92,26 +92,25 @@ def spawn(
         envs,
     ):
         """Spawn a python process (blocking)."""
-        with tempfile.TemporaryDirectory(dir=self._local_worker_dir) as function_dir, tempfile.TemporaryDirectory(
-            dir=function_dir
-        ) as args_dir:
-            function_dir = pathlib.Path(function_dir)
-            args_dir = pathlib.Path(args_dir)
-            uncompress(archive_path, function_dir)
-            script_name, function_name = _get_entrypoint_from_dockerfile(function_dir)
-
-            args_file = args_dir / "arguments.txt"
-
-            py_command = [sys.executable, str(function_dir / script_name), f"@{args_file}"]
-            py_command_args = _get_command_args(function_name, command_args_tpl, local_volumes)
-            write_command_args_file(args_file, py_command_args)
-
-            if data_sample_paths is not None and len(data_sample_paths) > 0:
-                _symlink_data_samples(data_sample_paths, local_volumes[VOLUME_INPUTS])
-
-            # Catching error and raising to be ISO to the docker local backend
-            # Don't capture the output to be able to use pdb
-            try:
-                subprocess.run(py_command, capture_output=False, check=True, cwd=function_dir, env=envs)
-            except subprocess.CalledProcessError as e:
-                raise ExecutionError(e)
+        with tempfile.TemporaryDirectory(dir=self._local_worker_dir) as function_dir:
+            with tempfile.TemporaryDirectory(dir=function_dir) as args_dir:
+                function_dir = pathlib.Path(function_dir)
+                args_dir = pathlib.Path(args_dir)
+                uncompress(archive_path, function_dir)
+                script_name, function_name = _get_entrypoint_from_dockerfile(function_dir)
+
+                args_file = args_dir / "arguments.txt"
+
+                py_command = [sys.executable, str(function_dir / script_name), f"@{args_file}"]
+                py_command_args = _get_command_args(function_name, command_args_tpl, local_volumes)
+                write_command_args_file(args_file, py_command_args)
+
+                if data_sample_paths is not None and len(data_sample_paths) > 0:
+                    _symlink_data_samples(data_sample_paths, local_volumes[VOLUME_INPUTS])
+
+                # Catching error and raising to be ISO to the docker local backend
+                # Don't capture the output to be able to use pdb
+                try:
+                    subprocess.run(py_command, capture_output=False, check=True, cwd=function_dir, env=envs)
+                except subprocess.CalledProcessError as e:
+                    raise ExecutionError(e)
diff --git a/tests/data_factory.py b/tests/data_factory.py
index 32bdd767..9f72594a 100644
--- a/tests/data_factory.py
+++ b/tests/data_factory.py
@@ -400,11 +400,17 @@ def create_function(
                 (
                     BAD_ENTRYPOINT_DOCKERFILE
                     if dockerfile_type == "BAD_ENTRYPOINT"
-                    else NO_ENTRYPOINT_DOCKERFILE
-                    if dockerfile_type == "NO_ENTRYPOINT"
-                    else NO_FUNCTION_NAME_DOCKERFILE
-                    if dockerfile_type == "NO_FUNCTION_NAME"
-                    else DEFAULT_FUNCTION_DOCKERFILE.format(function_name=DEFAULT_FUNCTION_FUNCTION_NAME[category])
+                    else (
+                        NO_ENTRYPOINT_DOCKERFILE
+                        if dockerfile_type == "NO_ENTRYPOINT"
+                        else (
+                            NO_FUNCTION_NAME_DOCKERFILE
+                            if dockerfile_type == "NO_FUNCTION_NAME"
+                            else DEFAULT_FUNCTION_DOCKERFILE.format(
+                                function_name=DEFAULT_FUNCTION_FUNCTION_NAME[category]
+                            )
+                        )
+                    )
                 ),
             ),
         )