diff --git a/tests/st/ops/ascend/test_autocast.py b/tests/st/ops/ascend/test_autocast.py
index af8d043a5f..2891e79d69 100644
--- a/tests/st/ops/ascend/test_autocast.py
+++ b/tests/st/ops/ascend/test_autocast.py
@@ -14,18 +14,17 @@
 # ============================================================================
 """multitype_ops directory test case"""
 import numpy as np
-from functools import partial, reduce
+import pytest
 
 import mindspore.nn as nn
 from mindspore import Tensor
 from mindspore import dtype as mstype
-from mindspore.ops import functional as F, composite as C
+from mindspore.ops import functional as F
 import mindspore.context as context
-import pytest
 
 
 class TensorIntAutoCast(nn.Cell):
-    def __init__(self, ):
+    def __init__(self,):
         super(TensorIntAutoCast, self).__init__()
         self.i = 2
 
@@ -35,7 +34,7 @@ class TensorIntAutoCast(nn.Cell):
 
 
 class TensorFPAutoCast(nn.Cell):
-    def __init__(self, ):
+    def __init__(self,):
         super(TensorFPAutoCast, self).__init__()
         self.f = 1.2
 
@@ -45,7 +44,7 @@ class TensorFPAutoCast(nn.Cell):
 
 
 class TensorBoolAutoCast(nn.Cell):
-    def __init__(self, ):
+    def __init__(self,):
         super(TensorBoolAutoCast, self).__init__()
         self.f = True
 
@@ -55,7 +54,7 @@ class TensorBoolAutoCast(nn.Cell):
 
 
 class TensorAutoCast(nn.Cell):
-    def __init__(self, ):
+    def __init__(self,):
         super(TensorAutoCast, self).__init__()
 
     def construct(self, t1, t2):
@@ -65,7 +64,7 @@ class TensorAutoCast(nn.Cell):
 
 def test_tensor_auto_cast():
     context.set_context(mode=context.GRAPH_MODE)
-    t0 = Tensor([True, False], mstype.bool_)
+    Tensor([True, False], mstype.bool_)
     t_uint8 = Tensor(np.ones([2, 1, 2, 2]), mstype.uint8)
     t_int8 = Tensor(np.ones([2, 1, 2, 2]), mstype.int8)
     t_int16 = Tensor(np.ones([2, 1, 2, 2]), mstype.int16)
diff --git a/tests/st/ops/ascend/test_ops_infer.py b/tests/st/ops/ascend/test_ops_infer.py
index 7b1489de3d..48aa79e109 100644
--- a/tests/st/ops/ascend/test_ops_infer.py
+++ b/tests/st/ops/ascend/test_ops_infer.py
@@ -13,7 +13,6 @@
 # limitations under the License.
 # ============================================================================
 """ test nn ops """
-import functools
 import numpy as np
 import mindspore.nn as nn
 import mindspore.common.dtype as mstype
diff --git a/tests/st/ops/cpu/test_lstm_op.py b/tests/st/ops/cpu/test_lstm_op.py
index 2115e46a16..540cad98ee 100644
--- a/tests/st/ops/cpu/test_lstm_op.py
+++ b/tests/st/ops/cpu/test_lstm_op.py
@@ -14,10 +14,10 @@
 # ============================================================================
 
 import pytest
-import mindspore.nn as nn
-from mindspore.common.api import ms_function
 import numpy as np
+import mindspore.nn as nn
 import mindspore.context as context
+from mindspore.common.api import ms_function
 from mindspore.common.initializer import initializer
 from mindspore.ops import composite as C
 from mindspore.ops import operations as P
@@ -196,10 +196,6 @@ def test_multi_layer_bilstm():
     bidirectional = True
     dropout = 0.0
 
-    num_directions = 1
-    if bidirectional:
-        num_directions = 2
-
     net = MultiLayerBiLstmNet(seq_len, batch_size, input_size, hidden_size, num_layers, has_bias, bidirectional,
                               dropout)
     y, h, c, _, _ = net()
@@ -305,9 +301,6 @@ def test_grad():
     has_bias = True
     bidirectional = False
     dropout = 0.0
-    num_directions = 1
-    if bidirectional:
-        num_directions = 2
     net = Grad(Net(seq_len, batch_size, input_size, hidden_size, num_layers, has_bias, bidirectional, dropout))
     dy = np.array([[[-3.5471e-01, 7.0540e-01],
                     [2.7161e-01, 1.0865e+00]],
diff --git a/tests/ut/python/dataset/test_random_crop_and_resize.py b/tests/ut/python/dataset/test_random_crop_and_resize.py
index 2fe158ddd6..8249d6a18a 100644
--- a/tests/ut/python/dataset/test_random_crop_and_resize.py
+++ b/tests/ut/python/dataset/test_random_crop_and_resize.py
@@ -94,7 +94,7 @@ def test_random_crop_and_resize_op_py(plot=False):
     for item1, item2 in zip(data1.create_dict_iterator(), data2.create_dict_iterator()):
         crop_and_resize = (item1["image"].transpose(1, 2, 0) * 255).astype(np.uint8)
         original = (item2["image"].transpose(1, 2, 0) * 255).astype(np.uint8)
-        original = cv2.resize(original, (512,256))
+        original = cv2.resize(original, (512, 256))
         mse = diff_mse(crop_and_resize, original)
         logger.info("random_crop_and_resize_op_{}, mse: {}".format(num_iter + 1, mse))
         num_iter += 1
diff --git a/tests/ut/python/ops/test_layer_switch.py b/tests/ut/python/ops/test_layer_switch.py
index af0da5a39a..35636637a4 100644
--- a/tests/ut/python/ops/test_layer_switch.py
+++ b/tests/ut/python/ops/test_layer_switch.py
@@ -78,4 +78,4 @@ def test_layer_switch():
     net = MySwitchNet()
     x = Tensor(np.ones((3, 3, 24, 24)), mindspore.float32)
     index = Tensor(0, dtype=mindspore.int32)
-    y = net(x, index)
+    net(x, index)
diff --git a/tests/ut/python/ops/test_math_ops_check.py b/tests/ut/python/ops/test_math_ops_check.py
index fd4cd1d3f3..355e35f933 100755
--- a/tests/ut/python/ops/test_math_ops_check.py
+++ b/tests/ut/python/ops/test_math_ops_check.py
@@ -28,7 +28,7 @@ from ....mindspore_test_framework.pipeline.forward.compile_forward \
 
 
 class AssignAddNet(nn.Cell):
-    def __init__(self, ):
+    def __init__(self,):
         super(AssignAddNet, self).__init__()
         self.op = P.AssignAdd()
         self.inputdata = Parameter(Tensor(np.zeros([1]).astype(np.bool_), mstype.bool_), name="assign_add1")
@@ -39,7 +39,7 @@ class AssignAddNet(nn.Cell):
 
 
 class AssignSubNet(nn.Cell):
-    def __init__(self, ):
+    def __init__(self,):
         super(AssignSubNet, self).__init__()
         self.op = P.AssignSub()
         self.inputdata = Parameter(Tensor(np.zeros([1]).astype(np.bool_), mstype.bool_), name="assign_sub1")