diff --git a/tests/basic/test_main.py b/tests/basic/test_main.py
index a8fbd4791..18ee26b77 100644
--- a/tests/basic/test_main.py
+++ b/tests/basic/test_main.py
@@ -100,7 +100,9 @@ class TestMain(TestCase):
     @patch("aider.main.os.chdir")
     @patch("aider.main.InputOutput")
     @patch("pathlib.Path.mkdir")
-    def test_setup_git_home_new_project(self, mock_mkdir, mock_io, mock_chdir, mock_glob, mock_home):
+    def test_setup_git_home_new_project(
+        self, mock_mkdir, mock_io, mock_chdir, mock_glob, mock_home
+    ):
         mock_home.return_value = Path("/home/user")
         mock_glob.return_value = [Path("/home/user/repo1/.git"), Path("/home/user/repo2/.git")]
         mock_io.return_value.prompt_ask.return_value = "new_project"
@@ -120,7 +122,9 @@ class TestMain(TestCase):
     @patch("aider.main.os.chdir")
     @patch("aider.main.InputOutput")
     @patch("pathlib.Path.mkdir")
-    def test_setup_git_home_no_existing_repos(self, mock_mkdir, mock_io, mock_chdir, mock_glob, mock_home):
+    def test_setup_git_home_no_existing_repos(
+        self, mock_mkdir, mock_io, mock_chdir, mock_glob, mock_home
+    ):
         mock_home.return_value = Path("/home/user")
         mock_glob.return_value = []
         mock_io.return_value.user_input.return_value = "new_project"
@@ -140,7 +144,9 @@ class TestMain(TestCase):
     @patch("aider.main.os.chdir")
     @patch("aider.main.InputOutput")
     @patch("pathlib.Path.mkdir")
-    def test_setup_git_home_directory_creation_error(self, mock_mkdir, mock_io, mock_chdir, mock_glob, mock_home):
+    def test_setup_git_home_directory_creation_error(
+        self, mock_mkdir, mock_io, mock_chdir, mock_glob, mock_home
+    ):
         mock_home.return_value = Path("/home/user")
         mock_glob.return_value = []
         mock_io.return_value.user_input.return_value = "new_project"
@@ -154,7 +160,9 @@ class TestMain(TestCase):
         )
         mock_mkdir.assert_called_once_with(parents=True, exist_ok=True)
         mock_chdir.assert_not_called()
-        mock_io.return_value.tool_error.assert_called_once_with("Error creating directory: Permission denied")
+        mock_io.return_value.tool_error.assert_called_once_with(
+            "Error creating directory: Permission denied"
+        )
         self.assertIsNone(result)
 
     def test_main_with_git_config_yml(self):