diff --git a/templates/python-project/tests/conftest.py b/templates/python-project/tests/conftest.py
index 55b2e9bd..1c810680 100644
--- a/templates/python-project/tests/conftest.py
+++ b/templates/python-project/tests/conftest.py
@@ -5,6 +5,6 @@ import pytest
 
 # returns a temporary directory with a fake git repo
 @pytest.fixture()
-def git_repo_path(tmp_path):
+def git_repo_path(tmp_path: str) -> str:
     subprocess.run(["mkdir", ".git"], cwd=tmp_path)
     return tmp_path
diff --git a/templates/python-project/tests/test_cli.py b/templates/python-project/tests/test_cli.py
index 5311f2bd..8855774a 100644
--- a/templates/python-project/tests/test_cli.py
+++ b/templates/python-project/tests/test_cli.py
@@ -1,15 +1,17 @@
 import sys
 
+import pytest
+
 import my_tool
 
 
-def test_no_args(capsys):
+def test_no_args(capsys: pytest.CaptureFixture) -> None:
     my_tool.my_cli()
     captured = capsys.readouterr()
     assert captured.out.startswith("usage:")
 
 
-def test_version(capsys, monkeypatch):
+def test_version(capsys: pytest.CaptureFixture, monkeypatch: pytest.MonkeyPatch) -> None:
     monkeypatch.setattr(sys, "argv", ["", "--version"])
     my_tool.my_cli()
     captured = capsys.readouterr()
diff --git a/templates/python-project/tests/test_detect_git_repo.py b/templates/python-project/tests/test_detect_git_repo.py
index 529105c1..d54bf7e2 100644
--- a/templates/python-project/tests/test_detect_git_repo.py
+++ b/templates/python-project/tests/test_detect_git_repo.py
@@ -4,13 +4,13 @@ import my_lib
 
 
 # using the fixture from conftest.py
-def test_is_git_repo(git_repo_path: str):
+def test_is_git_repo(git_repo_path: str) -> None:
     result = my_lib.detect_git_repo(git_repo_path)
     assert result is True
 
 
 # using the fixture from conftest.py
-def test_is_not_git_repo():
+def test_is_not_git_repo() -> None:
     with tempfile.TemporaryDirectory() as tempdir:
         result = my_lib.detect_git_repo(tempdir)
     assert result is False