diff --git a/openfisca_core/entities/role.py b/openfisca_core/entities/role.py
index 1ffa6ee95..ec8a2ce34 100644
--- a/openfisca_core/entities/role.py
+++ b/openfisca_core/entities/role.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from collections.abc import Sequence, Mapping
+from collections.abc import Mapping, Sequence
 from typing import Any
 
 import dataclasses
diff --git a/openfisca_core/entities/tests/test_group_entity.py b/openfisca_core/entities/tests/test_group_entity.py
index 882e77739..ed55648d7 100644
--- a/openfisca_core/entities/tests/test_group_entity.py
+++ b/openfisca_core/entities/tests/test_group_entity.py
@@ -8,50 +8,36 @@
 
 @pytest.fixture
 def parent() -> str:
-    """A key."""
-
     return "parent"
 
 
 @pytest.fixture
 def uncle() -> str:
-    """Another key."""
-
     return "uncle"
 
 
 @pytest.fixture
 def first_parent() -> str:
-    """A sub-role."""
-
     return "first_parent"
 
 
 @pytest.fixture
 def second_parent() -> str:
-    """Another sub-role."""
-
     return "second_parent"
 
 
 @pytest.fixture
 def third_parent() -> str:
-    """Yet another sub-role."""
-
     return "third_parent"
 
 
 @pytest.fixture
-def role(parent: str, first_parent: str, third_parent: str) -> Any:
-    """A role."""
-
+def role(parent: str, first_parent: str, third_parent: str) -> Mapping[str, Any]:
     return {"key": parent, "subroles": {first_parent, third_parent}}
 
 
 @pytest.fixture
 def group_entity(role: Mapping[str, Any]) -> entities.GroupEntity:
-    """A group entity."""
-
     return entities.GroupEntity("key", "label", "plural", "doc", (role,))
 
 
@@ -68,7 +54,7 @@ def test_init_when_doc_indented() -> None:
 def test_group_entity_with_roles(
     group_entity: entities.GroupEntity, parent: str, uncle: str
 ) -> None:
-    """Assign a role for each role-like passed as argument."""
+    """Assign a Role for each role-like passed as argument."""
 
     assert hasattr(group_entity, parent.upper())
     assert not hasattr(group_entity, uncle.upper())
@@ -77,7 +63,7 @@ def test_group_entity_with_roles(
 def test_group_entity_with_subroles(
     group_entity: entities.GroupEntity, first_parent: str, second_parent: str
 ) -> None:
-    """Assign a role for each sub-role-like passed as argument."""
+    """Assign a Role for each subrole-like passed as argument."""
 
     assert hasattr(group_entity, first_parent.upper())
     assert not hasattr(group_entity, second_parent.upper())
diff --git a/openfisca_core/entities/tests/test_role.py b/openfisca_core/entities/tests/test_role.py
index 13fda9465..83692e823 100644
--- a/openfisca_core/entities/tests/test_role.py
+++ b/openfisca_core/entities/tests/test_role.py
@@ -1,24 +1,11 @@
-from typing import Any
-
-import pytest
-
 from openfisca_core import entities
 
-from openfisca_core.entities.typing import Entity
-
-
-@pytest.fixture
-def entity() -> Any:
-    """An entity."""
-
-    return object()
-
 
-def test_init_when_doc_indented(entity: Entity) -> None:
+def test_init_when_doc_indented() -> None:
     """De-indent the ``doc`` attribute if it is passed at initialisation."""
 
     key = "\tkey"
     doc = "\tdoc"
-    role = entities.Role({"key": key, "doc": doc}, entity)
+    role = entities.Role({"key": key, "doc": doc}, object())
     assert role.key == key
     assert role.doc == doc.lstrip()