diff --git a/src/patito/_pydantic/dtypes/dtypes.py b/src/patito/_pydantic/dtypes/dtypes.py
index 3422487..24333d1 100644
--- a/src/patito/_pydantic/dtypes/dtypes.py
+++ b/src/patito/_pydantic/dtypes/dtypes.py
@@ -2,7 +2,7 @@
 
 from collections.abc import Mapping
 from functools import cache, reduce
-from operator import and_, or_
+from operator import or_
 from typing import TYPE_CHECKING, Any
 
 import polars as pl
diff --git a/tests/test_dtypes.py b/tests/test_dtypes.py
index 74e1a08..4406939 100644
--- a/tests/test_dtypes.py
+++ b/tests/test_dtypes.py
@@ -51,9 +51,7 @@ def test_valids_basic_annotations() -> None:
     with pytest.raises(TypeError, match="Mixed type enums not supported"):
         DtypeResolver(Literal[1, 2, "3"]).valid_polars_dtypes()  # pyright: ignore
 
-    assert DtypeResolver(
-        Literal["a", "b", "c"]
-    ).valid_polars_dtypes() == {  # pyright: ignore
+    assert DtypeResolver(Literal["a", "b", "c"]).valid_polars_dtypes() == {  # pyright: ignore
         pl.Enum(["a", "b", "c"]),
         pl.String,
     }