diff --git a/tests/conftest.py b/tests/conftest.py
index a8632d356..ba9b4de7b 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -10,14 +10,16 @@
     "tests.fixtures.motor.hybrid_fixtures",
     "tests.fixtures.motor.solid_motor_fixtures",
     "tests.fixtures.motor.liquid_fixtures",
+    "tests.fixtures.motor.generic_motor_fixtures",
     "tests.fixtures.parachutes.parachute_fixtures",
     "tests.fixtures.rockets.rocket_fixtures",
     "tests.fixtures.surfaces.surface_fixtures",
-    "tests.fixtures.units.numerical_fixtures"
+    "tests.fixtures.units.numerical_fixtures",
 ]
 
 #
 
+
 def pytest_addoption(parser):
     """Add option to run slow tests. This is used to skip slow tests by default.
 
diff --git a/tests/fixtures/hybrid/hybrid_fixtures.py b/tests/fixtures/hybrid/hybrid_fixtures.py
index 471e7a8bf..9c3d8c8dc 100644
--- a/tests/fixtures/hybrid/hybrid_fixtures.py
+++ b/tests/fixtures/hybrid/hybrid_fixtures.py
@@ -1,9 +1,17 @@
 import numpy as np
 import pytest
 
-from rocketpy import (CylindricalTank, Fluid, Function, HybridMotor,
-                      LevelBasedTank, LiquidMotor, MassBasedTank,
-                      SphericalTank, UllageBasedTank)
+from rocketpy import (
+    CylindricalTank,
+    Fluid,
+    Function,
+    HybridMotor,
+    LevelBasedTank,
+    LiquidMotor,
+    MassBasedTank,
+    SphericalTank,
+    UllageBasedTank,
+)
 
 
 @pytest.fixture
diff --git a/tests/fixtures/motor/motor_fixtures.py b/tests/fixtures/motor/motor_fixtures.py
index ca374164a..f53457d49 100644
--- a/tests/fixtures/motor/motor_fixtures.py
+++ b/tests/fixtures/motor/motor_fixtures.py
@@ -6,7 +6,6 @@
 ## Motors and rockets
 
 
-
 @pytest.fixture
 def cesaroni_m1670():  # old name: solid_motor
     """Create a simple object of the SolidMotor class to be used in the tests.
@@ -141,4 +140,4 @@ def generic_motor():
         dry_inertia=(0.2, 0.2, 0.08),
     )
 
-    return motor
\ No newline at end of file
+    return motor