diff --git a/tests/test_main.py b/tests/test_main.py
index cc6fa8705..41e1717bc 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -38,16 +38,14 @@ class TestMain(TestCase):
         self.assertTrue(os.path.exists("foo.txt"))
 
     def test_main_with_empty_git_dir_new_file(self):
-        subprocess.run(["git", "init"])
-        subprocess.run(["git", "config", "user.email", "dummy@example.com"])
-        subprocess.run(["git", "config", "user.name", "Dummy User"])
+        from tests.utils import make_repo
+        make_repo()
         main(["--yes", "foo.txt"], input=DummyInput(), output=DummyOutput())
         self.assertTrue(os.path.exists("foo.txt"))
 
     def test_main_with_git_config_yml(self):
-        subprocess.run(["git", "init"])
-        subprocess.run(["git", "config", "user.email", "dummy@example.com"])
-        subprocess.run(["git", "config", "user.name", "Dummy User"])
+        from tests.utils import make_repo
+        make_repo()
 
         Path(".aider.conf.yml").write_text("no-auto-commits: true\n")
         with patch("aider.main.Coder.create") as MockCoder:
@@ -62,9 +60,8 @@ class TestMain(TestCase):
             assert kwargs["auto_commits"] is True
 
     def test_main_with_empty_git_dir_new_subdir_file(self):
-        subprocess.run(["git", "init"])
-        subprocess.run(["git", "config", "user.email", "dummy@example.com"])
-        subprocess.run(["git", "config", "user.name", "Dummy User"])
+        from tests.utils import make_repo
+        make_repo()
         subdir = Path("subdir")
         subdir.mkdir()
         fname = subdir / "foo.txt"