diff --git a/src/qibotn/backends/cutensornet.py b/src/qibotn/backends/cutensornet.py
index 7696919..7dd1091 100644
--- a/src/qibotn/backends/cutensornet.py
+++ b/src/qibotn/backends/cutensornet.py
@@ -1,10 +1,10 @@
 import numpy as np
+from qibo import hamiltonians
 from qibo.backends import NumpyBackend
 from qibo.config import raise_error
-from qibotn.result import TensorNetworkResult
 
 from qibotn.backends.abstract import QibotnBackend
-from qibo import hamiltonians
+from qibotn.result import TensorNetworkResult
 
 CUDA_TYPES = {}
 
diff --git a/src/qibotn/eval.py b/src/qibotn/eval.py
index 0aae2ca..bb5b104 100644
--- a/src/qibotn/eval.py
+++ b/src/qibotn/eval.py
@@ -4,18 +4,13 @@ from cupy.cuda import nccl
 from cupy.cuda.runtime import getDeviceCount
 from cuquantum import Network, contract
 from mpi4py import MPI
+from qibo import hamiltonians
+from qibo.symbols import I, X, Y, Z
 
 from qibotn.circuit_convertor import QiboCircuitToEinsum
 from qibotn.circuit_to_mps import QiboCircuitToMPS
 from qibotn.mps_contraction_helper import MPSContractionHelper
 
-import cuquantum.cutensornet as cutn
-from cuquantum import Network
-from mpi4py import MPI
-from cupy.cuda import nccl
-from qibo import hamiltonians
-from qibo.symbols import X, Y, Z, I
-
 
 def check_observable(observable, circuit_nqubit):
     """Checks the type of observable and returns the appropriate Hamiltonian."""
diff --git a/tests/test_cuquantum_cutensor_backend.py b/tests/test_cuquantum_cutensor_backend.py
index dffea58..5130dd5 100644
--- a/tests/test_cuquantum_cutensor_backend.py
+++ b/tests/test_cuquantum_cutensor_backend.py
@@ -1,13 +1,13 @@
+import math
 from timeit import default_timer as timer
 
 import cupy as cp
 import numpy as np
 import pytest
 import qibo
+from qibo import Circuit, construct_backend, gates, hamiltonians
 from qibo.models import QFT
-from qibo import Circuit, gates, hamiltonians, construct_backend
 from qibo.symbols import X, Z
-import math
 
 
 def qibo_qft(nqubits, swaps):