diff --git a/perscache/cache.py b/perscache/cache.py
index 432e3d6..6a766c7 100644
--- a/perscache/cache.py
+++ b/perscache/cache.py
@@ -125,7 +125,7 @@ def _get_key(
 
         return hash_it(inspect.getsource(fn), type(serializer).__name__, arg_dict)
 
-    def _get_filename(self, fn: callable, key: str, serializer: Serializer) -> str:
+    def _get_filename(self, fn: Callable, key: str, serializer: Serializer) -> str:
         return f"{fn.__name__}-{key}.{serializer.extension}"
 
 
diff --git a/perscache/serializers.py b/perscache/serializers.py
index 3167d06..34ced37 100644
--- a/perscache/serializers.py
+++ b/perscache/serializers.py
@@ -2,11 +2,10 @@
 import json
 import pickle
 from abc import ABC, abstractmethod
-from typing import Type
 
 import cloudpickle
 from beartype import beartype
-from beartype.typing import Any, Callable, Optional
+from beartype.typing import Any, Callable, Optional, Type
 
 
 class Serializer(ABC):
diff --git a/tests/pytest.ini b/pytest.ini
similarity index 100%
rename from tests/pytest.ini
rename to pytest.ini