diff --git a/src/barril/__init__.py b/src/barril/__init__.py
index ca75d42..49e73f4 100644
--- a/src/barril/__init__.py
+++ b/src/barril/__init__.py
@@ -1,4 +1,3 @@
-
 """Top-level package for Barril."""
 
 __author__ = """ESSS"""
diff --git a/src/barril/basic/format_float/_tests/test_format_float.py b/src/barril/basic/format_float/_tests/test_format_float.py
index dde11ec..2acb1c5 100644
--- a/src/barril/basic/format_float/_tests/test_format_float.py
+++ b/src/barril/basic/format_float/_tests/test_format_float.py
@@ -1,4 +1,3 @@
-
 import locale
 
 from barril.basic.format_float import FormatFloat, MINUS_INFINITY, NAN, PLUS_INFINITY
diff --git a/src/barril/conftest.py b/src/barril/conftest.py
index de08fae..448711b 100644
--- a/src/barril/conftest.py
+++ b/src/barril/conftest.py
@@ -1,4 +1,3 @@
-
 import pytest
 
 from barril import units
diff --git a/src/barril/units/_tests/test_posc.py b/src/barril/units/_tests/test_posc.py
index 2638014..88db09c 100644
--- a/src/barril/units/_tests/test_posc.py
+++ b/src/barril/units/_tests/test_posc.py
@@ -1,4 +1,3 @@
-
 from barril import units
 from barril.units import ObtainQuantity
 from barril.units.posc import (
diff --git a/src/barril/units/_tests/test_posc2.py b/src/barril/units/_tests/test_posc2.py
index 3cf9bc8..419b21e 100644
--- a/src/barril/units/_tests/test_posc2.py
+++ b/src/barril/units/_tests/test_posc2.py
@@ -1,4 +1,3 @@
-
 import pytest
 from pytest import approx
 
diff --git a/src/barril/units/_tests/test_posc_additional_units.py b/src/barril/units/_tests/test_posc_additional_units.py
index 003b4ff..2162317 100644
--- a/src/barril/units/_tests/test_posc_additional_units.py
+++ b/src/barril/units/_tests/test_posc_additional_units.py
@@ -1,4 +1,3 @@
-
 import pytest
 from pytest import approx
 
diff --git a/src/barril/units/_tests/test_unit_database.py b/src/barril/units/_tests/test_unit_database.py
index e06efdb..0c94397 100644
--- a/src/barril/units/_tests/test_unit_database.py
+++ b/src/barril/units/_tests/test_unit_database.py
@@ -1,4 +1,3 @@
-
 import pytest
 from pytest import approx
 
diff --git a/src/barril/units/scalar_validation/_tests/test_scalar_min_max_validator.py b/src/barril/units/scalar_validation/_tests/test_scalar_min_max_validator.py
index 01838f2..7307414 100644
--- a/src/barril/units/scalar_validation/_tests/test_scalar_min_max_validator.py
+++ b/src/barril/units/scalar_validation/_tests/test_scalar_min_max_validator.py
@@ -1,6 +1,6 @@
 from barril.units import Scalar
 from barril.units.scalar_validation.scalar_min_max_validator import (
-    ScalarMinMaxValidator
+    ScalarMinMaxValidator,
 )