diff --git a/src/fastcs/attributes.py b/src/fastcs/attributes.py
index b99b6b8f..95426385 100644
--- a/src/fastcs/attributes.py
+++ b/src/fastcs/attributes.py
@@ -69,9 +69,10 @@ def __init__(
         allowed_values: list[T] | None = None,
         description: str | None = None,
     ) -> None:
-        assert (
-            datatype.dtype in ATTRIBUTE_TYPES
-        ), f"Attr type must be one of {ATTRIBUTE_TYPES}, received type {datatype.dtype}"
+        assert datatype.dtype in ATTRIBUTE_TYPES, (
+            f"Attr type must be one of {ATTRIBUTE_TYPES}"
+            ", received type {datatype.dtype}"
+        )
         self._datatype: DataType[T] = datatype
         self._access_mode: AttrMode = access_mode
         self._group = group
diff --git a/src/fastcs/backend.py b/src/fastcs/backend.py
index e2d74f25..07b26171 100644
--- a/src/fastcs/backend.py
+++ b/src/fastcs/backend.py
@@ -83,9 +83,9 @@ def _link_attribute_sender_class(single_mapping: SingleMapping) -> None:
     for attr_name, attribute in single_mapping.attributes.items():
         match attribute:
             case AttrW(sender=Sender()):
-                assert (
-                    not attribute.has_process_callback()
-                ), f"Cannot assign both put method and Sender object to {attr_name}"
+                assert not attribute.has_process_callback(), (
+                    f"Cannot assign both put method and Sender object to {attr_name}"
+                )
 
                 callback = _create_sender_callback(attribute, single_mapping.controller)
                 attribute.set_process_callback(callback)
diff --git a/src/fastcs/transport/epics/util.py b/src/fastcs/transport/epics/util.py
index b1ffa608..c63b3cf8 100644
--- a/src/fastcs/transport/epics/util.py
+++ b/src/fastcs/transport/epics/util.py
@@ -36,9 +36,9 @@ def attr_is_enum(attribute: Attribute) -> bool:
 
     """
     match attribute:
-        case Attribute(
-            datatype=String(), allowed_values=allowed_values
-        ) if allowed_values is not None and len(allowed_values) <= MBB_MAX_CHOICES:
+        case Attribute(datatype=String(), allowed_values=allowed_values) if (
+            allowed_values is not None and len(allowed_values) <= MBB_MAX_CHOICES
+        ):
             return True
         case _:
             return False
diff --git a/tests/test_launch.py b/tests/test_launch.py
index cafae874..ce26573f 100644
--- a/tests/test_launch.py
+++ b/tests/test_launch.py
@@ -102,7 +102,7 @@ def test_over_defined_schema():
 
 def test_version():
     impl_version = "0.0.1"
-    expected = f"SingleArg: {impl_version}\n" f"FastCS: {__version__}\n"
+    expected = f"SingleArg: {impl_version}\nFastCS: {__version__}\n"
     app = _launch(SingleArg, version=impl_version)
     result = runner.invoke(app, ["version"])
     assert result.exit_code == 0
diff --git a/tests/transport/epics/test_ioc.py b/tests/transport/epics/test_ioc.py
index 516cb906..3e71891e 100644
--- a/tests/transport/epics/test_ioc.py
+++ b/tests/transport/epics/test_ioc.py
@@ -436,7 +436,7 @@ def test_long_pv_names_discarded(mocker: MockerFixture):
 
     assert long_name_controller.command_short_name.fastcs_method.enabled
     long_command_name = (
-        "command_with_" "reallyreallyreallyreallyreallyreallyreally_long_name"
+        "command_with_reallyreallyreallyreallyreallyreallyreally_long_name"
     )
     assert not getattr(long_name_controller, long_command_name).fastcs_method.enabled