diff --git a/python/rainbow/cuda/geometry/grid3.py b/python/rainbow/cuda/geometry/grid3.py
index a8395ea..cc5ff99 100644
--- a/python/rainbow/cuda/geometry/grid3.py
+++ b/python/rainbow/cuda/geometry/grid3.py
@@ -149,7 +149,6 @@ def get_gradient_device(p: float64[:], min_coord: float64[:], spacing: float64[:
 def is_inside_device(p: float64[:], min_coord: float64[:], max_coord: float64[:], boundary: float64) -> boolean:
     """ This function test if the given spatial 3D point is inside the given grid and the boundary value.
 
-
     Args:
         p (float64[:]): The 3D spatial point.
         min_coord (float64[:]): The minimum corner of the grid.
diff --git a/python/rainbow/cuda/unit_tests/test_math_matrix_kernel.py b/python/rainbow/cuda/unit_tests/test_math_matrix_kernel.py
index c423876..1fdfdbc 100644
--- a/python/rainbow/cuda/unit_tests/test_math_matrix_kernel.py
+++ b/python/rainbow/cuda/unit_tests/test_math_matrix_kernel.py
@@ -87,6 +87,7 @@ def mat33_dot_vec3_kernel(M: float64[:, :, :], V3: float64[:, :], result: float6
     tid = cuda.threadIdx.x
     Matrix.mat33_dot_vec3(M[tid, :, :], V3[tid, :], result[tid, :])
 
+
 @cuda.jit
 def mat43_T_kernel(M: float64[:, :, :], result: float64[:, :, :]):
     """ Unit test kernel function for mat43_T_device
diff --git a/python/unit_tests/test_cuda_geometry_grid3.py b/python/unit_tests/test_cuda_geometry_grid3.py
index 5c55ceb..af2a334 100644
--- a/python/unit_tests/test_cuda_geometry_grid3.py
+++ b/python/unit_tests/test_cuda_geometry_grid3.py
@@ -11,11 +11,11 @@
 import rainbow.cuda.unit_tests.test_geometry_grid3_kernel as TEST_GRID3K
 
 
-
 def simpelfunc(coord):
     _, _, z = coord[0], coord[1], coord[2]
     return z
 
+
 @unittest.skipIf(not cuda.is_available(), "CUDA not available")
 class TestGrid3Cuda(unittest.TestCase):