diff --git a/tests/geo_ressources.py b/tests/geo_ressources.py
index 7069642..a23fc18 100644
--- a/tests/geo_ressources.py
+++ b/tests/geo_ressources.py
@@ -6,16 +6,16 @@
 LONDON = (51.509865, -0.118092)
 
 EXPECTED_LYON_PARIS = {Unit.KILOMETERS: 392.2172595594006,
-            Unit.METERS: 392217.2595594006,
-            Unit.MILES: 243.71250609539814,
-            Unit.NAUTICAL_MILES: 211.78037755311516,
-            Unit.FEET: 1286802.0326751503,
-            Unit.INCHES: 15441624.392102592,
-            Unit.RADIANS: 0.061562818679421795,
-            Unit.DEGREES: 3.5272896852600164}
+                       Unit.METERS: 392217.2595594006,
+                       Unit.MILES: 243.71250609539814,
+                       Unit.NAUTICAL_MILES: 211.78037755311516,
+                       Unit.FEET: 1286802.0326751503,
+                       Unit.INCHES: 15441624.392102592,
+                       Unit.RADIANS: 0.061562818679421795,
+                       Unit.DEGREES: 3.5272896852600164}
 EXPECTED_LYON_NEW_YORK = {Unit.KILOMETERS: 6163.43638211,
-            Unit.METERS: 61634363.8211 }
+                          Unit.METERS: 61634363.8211}
 EXPECTED_PARIS_NEW_YORK = {Unit.KILOMETERS: 5853.32898662,
-            Unit.METERS: 58533289.8662 }
+                           Unit.METERS: 58533289.8662}
 EXPECTED_LONDON_PARIS = {Unit.KILOMETERS: 343.37455271}
 EXPECTED_LONDON_NEW_YORK = {Unit.KILOMETERS: 5586.48447423}
diff --git a/tests/test_haversine.py b/tests/test_haversine.py
index ae93adf..07fc867 100755
--- a/tests/test_haversine.py
+++ b/tests/test_haversine.py
@@ -4,6 +4,7 @@
 
 from tests.geo_ressources import LYON, PARIS, NEW_YORK, LONDON, EXPECTED_LYON_PARIS
 
+
 def haversine_test_factory(unit):
     def test():
         expected = EXPECTED_LYON_PARIS[unit]
@@ -81,6 +82,7 @@ def test_out_of_bounds(oob_from, oob_to):
     with pytest.raises(ValueError):
         haversine(oob_from, oob_to, normalize=False)
 
+
 @pytest.mark.parametrize(
     "in_bounds_from,in_bounds_to", [
         ((-90, 0), (0, 0)),
diff --git a/tests/test_haversine_vector.py b/tests/test_haversine_vector.py
index 0f84ce5..e10b080 100644
--- a/tests/test_haversine_vector.py
+++ b/tests/test_haversine_vector.py
@@ -4,6 +4,7 @@
 
 from tests.geo_ressources import EXPECTED_LONDON_PARIS, EXPECTED_LYON_NEW_YORK, EXPECTED_LYON_PARIS, EXPECTED_LONDON_NEW_YORK, LYON, PARIS, NEW_YORK, LONDON
 
+
 @pytest.mark.parametrize(
     'unit', [Unit.KILOMETERS, Unit.METERS, Unit.INCHES]
 )
@@ -12,7 +13,8 @@ def test_lyon_paris(unit):
         expected_lyon_paris = EXPECTED_LYON_PARIS[unit]
         assert haversine_vector(LYON, PARIS, unit=unit) == expected_lyon_paris
         assert isinstance(unit.value, str)
-        assert haversine_vector(LYON, PARIS, unit=unit.value) == expected_lyon_paris
+        assert haversine_vector(
+            LYON, PARIS, unit=unit.value) == expected_lyon_paris
 
     return test_lyon_paris(unit)
 
@@ -38,7 +40,8 @@ def test_normalization(oob_from, oob_to, proper_from, proper_to):
     """
     normalized_during, normalized_already = (
         haversine_vector([oob_from], [oob_to], Unit.DEGREES, normalize=True),
-        haversine_vector([proper_from], [proper_to], Unit.DEGREES, normalize=True),
+        haversine_vector([proper_from], [proper_to],
+                         Unit.DEGREES, normalize=True),
     )
     assert normalized_during == pytest.approx(normalized_already, abs=1e-10)
 
@@ -68,11 +71,12 @@ def test_haversine_vector_comb():
         [EXPECTED_LYON_NEW_YORK[unit], EXPECTED_LONDON_NEW_YORK[unit]]
     ]
 
-    assert_allclose( # See https://numpy.org/doc/stable/reference/generated/numpy.testing.assert_allclose.html#numpy.testing.assert_allclose
+    assert_allclose(  # See https://numpy.org/doc/stable/reference/generated/numpy.testing.assert_allclose.html#numpy.testing.assert_allclose
         haversine_vector([LYON, LONDON], [PARIS, NEW_YORK], unit, comb=True),
         expected
     )
 
+
 def test_units_enum():
     from haversine.haversine import _CONVERSIONS
     assert all(unit in _CONVERSIONS for unit in Unit)
diff --git a/tests/test_inverse_haversine.py b/tests/test_inverse_haversine.py
index 34cb6fb..7538ed9 100755
--- a/tests/test_inverse_haversine.py
+++ b/tests/test_inverse_haversine.py
@@ -5,6 +5,7 @@
 
 from tests.geo_ressources import LYON, PARIS, NEW_YORK, LONDON
 
+
 @pytest.mark.parametrize(
     "point, dir, dist, result",
     [
@@ -18,7 +19,8 @@
     ],
 )
 def test_inverse_kilometers(point, dir, dist, result):
-    assert isclose(inverse_haversine(point, dist, dir), result, rtol=1e-5).all()
+    assert isclose(inverse_haversine(point, dist, dir),
+                   result, rtol=1e-5).all()
 
 
 @pytest.mark.parametrize(
@@ -36,8 +38,10 @@ def test_back_and_forth(point, direction, distance, unit):
 
 
 def test_inverse_miles():
-    assert isclose(inverse_haversine(PARIS, 50, Direction.NORTH, unit=Unit.MILES), (49.5803579218996, 2.3508), rtol=1e-5).all()
+    assert isclose(inverse_haversine(PARIS, 50, Direction.NORTH,
+                   unit=Unit.MILES), (49.5803579218996, 2.3508), rtol=1e-5).all()
 
 
 def test_nautical_inverse_miles():
-    assert isclose(inverse_haversine(PARIS, 10, Direction.SOUTH, unit=Unit.NAUTICAL_MILES), (48.69014586638915, 2.3508), rtol=1e-5).all()
+    assert isclose(inverse_haversine(PARIS, 10, Direction.SOUTH,
+                   unit=Unit.NAUTICAL_MILES), (48.69014586638915, 2.3508), rtol=1e-5).all()