diff --git a/python/taichi/_kernels.py b/python/taichi/_kernels.py
index e6f7c116dfeab..03f3383c8bf00 100644
--- a/python/taichi/_kernels.py
+++ b/python/taichi/_kernels.py
@@ -142,7 +142,7 @@ def tensor_to_tensor(tensor: template(), other: template()):
     other_offset_new = static([0] * len(other_shape) if len(other_offset) == 0 else other_offset)
 
     for I in grouped(ndrange(*tensor_shape)):
-        print('index ', I)
+        print("index ", I)
         tensor[I + tensor_offset_new] = other[I + other_offset_new]
 
 
diff --git a/tests/python/test_field.py b/tests/python/test_field.py
index 2d36d7b284ecc..9077027f2aa29 100644
--- a/tests/python/test_field.py
+++ b/tests/python/test_field.py
@@ -85,7 +85,10 @@ def test_scalr_field_from_numpy(dtype, shape):
 
 
 @pytest.mark.parametrize("dtype", data_types)
-@pytest.mark.parametrize("shape, offset", [((), ()), (8, 0), (8, 8), (8, -4), ((6, 12), (-4, -4)), ((6, 12), (-4, 4)), ((6, 12), (4, -4)), ((6, 12), (8, 8))])
+@pytest.mark.parametrize(
+    "shape, offset",
+    [((), ()), (8, 0), (8, 8), (8, -4), ((6, 12), (-4, -4)), ((6, 12), (-4, 4)), ((6, 12), (4, -4)), ((6, 12), (8, 8))],
+)
 @test_utils.test(arch=get_host_arch_list())
 def test_scalr_field_from_numpy_with_offset(dtype, shape, offset):
     import numpy as np
@@ -273,7 +276,19 @@ def test_field_copy_from_with_mismatch_shape():
 
 
 @test_utils.test()
-@pytest.mark.parametrize("shape, x_offset, other_offset", [((), (), ()), (8, 4, 0), (8, 0, -4), (8, -4, -4), (8, 8, -4), ((6, 12), (0, 0), (-6, -6)), ((6, 12), (-6, -6), (0, 0)), ((6, 12), (-6, -6), (-6, -6))])
+@pytest.mark.parametrize(
+    "shape, x_offset, other_offset",
+    [
+        ((), (), ()),
+        (8, 4, 0),
+        (8, 0, -4),
+        (8, -4, -4),
+        (8, 8, -4),
+        ((6, 12), (0, 0), (-6, -6)),
+        ((6, 12), (-6, -6), (0, 0)),
+        ((6, 12), (-6, -6), (-6, -6)),
+    ],
+)
 @pytest.mark.parametrize("dtype", [ti.i32, ti.f32])
 def test_field_copy_from_with_offset(shape, dtype, x_offset, other_offset):
     x = ti.field(dtype=ti.f32, shape=shape, offset=x_offset)
diff --git a/tests/python/test_gui.py b/tests/python/test_gui.py
index 82c69ab4b8500..6f3f5fda00219 100644
--- a/tests/python/test_gui.py
+++ b/tests/python/test_gui.py
@@ -39,11 +39,11 @@ def test_set_image_with_offset(fast_gui, offset, dtype, color):
     n = 300
     shape = (n, n)
     if fast_gui is True or dtype is ti.f64:
-        img = ti.Vector.field(dtype=dtype, n = 3, shape=shape, offset=offset)
+        img = ti.Vector.field(dtype=dtype, n=3, shape=shape, offset=offset)
     else:
         img = ti.field(dtype=dtype, shape=shape, offset=offset)
-    img.fill(color);
+    img.fill(color)
 
-    gui = ti.GUI(name='test', res=shape, show_gui=False, fast_gui=fast_gui)
+    gui = ti.GUI(name="test", res=shape, show_gui=False, fast_gui=fast_gui)
     gui.set_image(img)
     gui.show()
diff --git a/tests/python/test_matrix.py b/tests/python/test_matrix.py
index 15128e45e10c6..18931a1146daa 100644
--- a/tests/python/test_matrix.py
+++ b/tests/python/test_matrix.py
@@ -1306,13 +1306,17 @@ def access_mat(i: ti.i32, j: ti.i32):
 
 
 @pytest.mark.parametrize("dtype", [ti.i32, ti.f32, ti.i64, ti.f64])
-@pytest.mark.parametrize("shape, offset", [((), ()), (8, 0), (8, 8), (8, -4), ((6, 12), (-4, -4)), ((6, 12), (-4, 4)), ((6, 12), (4, -4)), ((6, 12), (8, 8))])
+@pytest.mark.parametrize(
+    "shape, offset",
+    [((), ()), (8, 0), (8, 8), (8, -4), ((6, 12), (-4, -4)), ((6, 12), (-4, 4)), ((6, 12), (4, -4)), ((6, 12), (8, 8))],
+)
 @test_utils.test(arch=get_host_arch_list())
 def test_matrix_from_numpy_with_offset(dtype, shape, offset):
     import numpy as np
+
     m = 3
     n = 4
-    x = ti.Matrix.field(dtype=dtype,m=m,n=n, shape=shape, offset=offset)
+    x = ti.Matrix.field(dtype=dtype, m=m, n=n, shape=shape, offset=offset)
     # use the corresponding dtype for the numpy array.
     numpy_dtypes = {
         ti.i32: np.int32,
diff --git a/tests/python/test_offset.py b/tests/python/test_offset.py
index f59f815d2d0b1..93dc30d52c90b 100644
--- a/tests/python/test_offset.py
+++ b/tests/python/test_offset.py
@@ -149,14 +149,14 @@ def test_offset_must_throw_matrix():
 
 @test_utils.test(arch=get_host_arch_list())
 def test_field_offset_print():
-    val = ti.field(dtype=ti.f32, shape=(3,3), offset=(-1, -1))
+    val = ti.field(dtype=ti.f32, shape=(3, 3), offset=(-1, -1))
     val.fill(1.0)
     print(val)
 
 
 @test_utils.test(arch=get_host_arch_list())
 def test_field_offset_to_numpy():
-    shape = (3,3)
-    val =  ti.field(dtype=ti.f32, shape=shape, offset=(-1, -1))
+    shape = (3, 3)
+    val = ti.field(dtype=ti.f32, shape=shape, offset=(-1, -1))
     val.fill(1.0)
     assert np.allclose(val.to_numpy(), np.ones(shape, dtype=np.float32))