diff --git a/pkgs/clan-cli/pyproject.toml b/pkgs/clan-cli/pyproject.toml
index f763cdc..fa2a293 100644
--- a/pkgs/clan-cli/pyproject.toml
+++ b/pkgs/clan-cli/pyproject.toml
@@ -17,9 +17,6 @@ warn_redundant_casts = true
 disallow_untyped_calls = true
 disallow_untyped_defs = true
 no_implicit_optional = true
-exclude = [
-  "tests"
-]
 
 [[tool.mypy.overrides]]
 module = "setuptools.*"
diff --git a/pkgs/clan-cli/tests/test_clan_admin.py b/pkgs/clan-cli/tests/test_clan_admin.py
index 555186c..db829c8 100644
--- a/pkgs/clan-cli/tests/test_clan_admin.py
+++ b/pkgs/clan-cli/tests/test_clan_admin.py
@@ -1,16 +1,20 @@
 import argparse
+from typing import Union
+
+import pytest_subprocess.fake_process
+from pytest_subprocess import utils
 
 from clan_cli import admin
 
 
-def test_make_parser():
+def test_make_parser() -> None:
     parser = argparse.ArgumentParser()
     admin.register_parser(parser)
 
 
 # using fp fixture from pytest-subprocess
-def test_create(fp):
-    cmd = ["nix", "flake", "init", "-t", fp.any()]
+def test_create(fp: pytest_subprocess.fake_process.FakeProcess) -> None:
+    cmd: list[Union[str, utils.Any]] = ["nix", "flake", "init", "-t", fp.any()]
     fp.register(cmd)
     args = argparse.Namespace(folder="./my-clan")
     admin.create(args)
diff --git a/pkgs/clan-cli/tests/test_cli.py b/pkgs/clan-cli/tests/test_cli.py
index 993e4b9..a02c039 100644
--- a/pkgs/clan-cli/tests/test_cli.py
+++ b/pkgs/clan-cli/tests/test_cli.py
@@ -10,7 +10,7 @@ def test_no_args(capsys):
     assert captured.out.startswith("usage:")
 
 
-def test_help(capsys, monkeypatch):
+def test_help(capsys: pytest.CaptureFixture, monkeypatch: pytest.MonkeyPatch) -> None:
     monkeypatch.setattr(sys, "argv", ["", "--help"])
     with pytest.raises(SystemExit):
         clan_cli.main()
diff --git a/templates/python-project/pyproject.toml b/templates/python-project/pyproject.toml
index a3ee5c6..22a6c9a 100644
--- a/templates/python-project/pyproject.toml
+++ b/templates/python-project/pyproject.toml
@@ -20,9 +20,6 @@ warn_redundant_casts = true
 disallow_untyped_calls = true
 disallow_untyped_defs = true
 no_implicit_optional = true
-exclude = [
-  "tests"
-]
 
 [[tool.mypy.overrides]]
 module = "setuptools.*"