diff --git a/paddle/fluid/eager/utils.cc b/paddle/fluid/eager/utils.cc
index 7d9554c52eb6c94f31d77afddb93a99cf37c4682..4d7d1aa2d8a3de6258dff2ee514b68f86526b1d0 100644
--- a/paddle/fluid/eager/utils.cc
+++ b/paddle/fluid/eager/utils.cc
@@ -27,7 +27,7 @@
 #include "paddle/fluid/framework/phi_utils.h"
 #include "paddle/fluid/framework/variable.h"
 
-PADDLE_DEFINE_EXPORTED_bool(retain_grad_for_all_tensor, true,
+PADDLE_DEFINE_EXPORTED_bool(retain_grad_for_all_tensor, false,
                             "retain grad for all tensor");
 
 namespace egr {
diff --git a/python/paddle/fluid/tests/custom_op/test_custom_tanh_double_grad.py b/python/paddle/fluid/tests/custom_op/test_custom_tanh_double_grad.py
index 3b3a0e2edec986fe1d242748de800d929986ba08..0fa07abe9d01614300b1b758373855faa572a87f 100644
--- a/python/paddle/fluid/tests/custom_op/test_custom_tanh_double_grad.py
+++ b/python/paddle/fluid/tests/custom_op/test_custom_tanh_double_grad.py
@@ -17,6 +17,7 @@ import unittest
 import numpy as np
 
 import paddle
+import paddle.fluid as fluid
 import paddle.static as static
 from paddle.utils.cpp_extension import load, get_build_directory
 from paddle.utils.cpp_extension.extension_utils import run_cmd
@@ -40,6 +41,7 @@ custom_ops = load(
 
 
 def custom_tanh_double_grad_dynamic(func, device, dtype, np_x):
+    fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
     paddle.set_device(device)
 
     t = paddle.to_tensor(np_x, dtype=dtype, stop_gradient=False)
@@ -55,6 +57,7 @@ def custom_tanh_double_grad_dynamic(func, device, dtype, np_x):
     assert out.grad is not None
     assert dx[0].grad is not None
     return dx[0].numpy(), dx[0].grad.numpy(), out.grad.numpy()
+    fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 class TestCustomTanhDoubleGradJit(unittest.TestCase):
@@ -85,9 +88,11 @@ class TestCustomTanhDoubleGradJit(unittest.TestCase):
                         dout, pd_dout))
 
     def test_func_double_grad_dynamic(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_double_grad_dynamic()
         self.func_double_grad_dynamic()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 if __name__ == "__main__":
diff --git a/python/paddle/fluid/tests/unittests/autograd/test_autograd_functional_dynamic.py b/python/paddle/fluid/tests/unittests/autograd/test_autograd_functional_dynamic.py
index 40aead907656997917a601516f6fd44a09ae7062..a4c09cd661ae5a5debea34bfeafcd1efa98b7688 100644
--- a/python/paddle/fluid/tests/unittests/autograd/test_autograd_functional_dynamic.py
+++ b/python/paddle/fluid/tests/unittests/autograd/test_autograd_functional_dynamic.py
@@ -18,6 +18,7 @@ import unittest
 
 import numpy as np
 import paddle
+import paddle.fluid as fluid
 import paddle.compat as cpt
 import paddle.nn.functional as F
 from paddle.autograd.functional import _as_tensors
@@ -490,6 +491,8 @@ class TestHessianClassNoBatch(unittest.TestCase):
                                    self.rtol, self.atol)
 
     def func_create_graph_true(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
+
         def func(x):
             return paddle.sum(F.sigmoid(x))
 
@@ -501,6 +504,7 @@ class TestHessianClassNoBatch(unittest.TestCase):
         assert hessian[:].stop_gradient == False
         np.testing.assert_allclose(hessian[:].numpy(), numerical_hessian,
                                    self.rtol, self.atol)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_out_not_single(self):
         def func(x):
@@ -733,6 +737,8 @@ class TestHessian(unittest.TestCase):
                 "does not appear") > 0
 
     def func_create_graph_true(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
+
         def func(x):
             return paddle.sum(F.sigmoid(x))
 
@@ -745,6 +751,7 @@ class TestHessian(unittest.TestCase):
                                    self.rtol, self.atol)
         triple_grad = paddle.grad(hessian, self.x)
         assert triple_grad is not None
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_all_cases(self):
         with _test_eager_guard():
@@ -1018,6 +1025,8 @@ class TestVHP(unittest.TestCase):
                                    self.atol)
 
     def func_create_graph_true(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
+
         def func(x):
             return paddle.sum(F.sigmoid(x))
 
@@ -1034,6 +1043,7 @@ class TestVHP(unittest.TestCase):
                                    self.atol)
         triple_grad = paddle.grad(vhp, self.x)
         assert triple_grad is not None
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_all_cases(self):
         with _test_eager_guard():
@@ -1102,6 +1112,8 @@ class TestJacobian(unittest.TestCase):
                                        self.atol)
 
     def func_multi_input_and_multi_output(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
+
         def func(x, y):
             return paddle.matmul(x, y), x * y
 
@@ -1115,6 +1127,7 @@ class TestJacobian(unittest.TestCase):
                 np.testing.assert_allclose(jacobian[i][j].numpy(),
                                            numerical_jacobian[i][j], self.rtol,
                                            self.atol)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_allow_unused_false(self):
         def func(x, y):
diff --git a/python/paddle/fluid/tests/unittests/test_activation_nn_grad.py b/python/paddle/fluid/tests/unittests/test_activation_nn_grad.py
index 919ae5244712879dd7c9b7b6329b865a7d5b7c93..41e1f98e5f60224e5ac2ba564af4081c5b62476a 100644
--- a/python/paddle/fluid/tests/unittests/test_activation_nn_grad.py
+++ b/python/paddle/fluid/tests/unittests/test_activation_nn_grad.py
@@ -67,8 +67,10 @@ class TestSigmoidDoubleGradCheck(unittest.TestCase):
         x_arr[np.abs(x_arr) < 0.005] = 0.002
         gradient_checker.double_grad_check(
             [x], y, x_init=x_arr, place=place, eps=eps)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         gradient_checker.double_grad_check_for_dygraph(
             self.sigmoid_wrapper, [x], y, x_init=x_arr, place=place)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_grad(self):
         paddle.enable_static()
@@ -95,8 +97,10 @@ class TestTanhTripleGradCheck(unittest.TestCase):
         x_arr[np.abs(x_arr) < 0.005] = 0.002
         gradient_checker.triple_grad_check(
             [x], y, x_init=x_arr, place=place, eps=eps)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         gradient_checker.triple_grad_check_for_dygraph(
             self.tanh_wrapper, [x], y, x_init=x_arr, place=place)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_grad(self):
         paddle.enable_static()
@@ -123,8 +127,10 @@ class TestTanhDoubleGradCheck(unittest.TestCase):
         x_arr[np.abs(x_arr) < 0.005] = 0.002
         gradient_checker.double_grad_check(
             [x], y, x_init=x_arr, place=place, eps=eps)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         gradient_checker.double_grad_check_for_dygraph(
             self.tanh_wrapper, [x], y, x_init=x_arr, place=place)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_grad(self):
         paddle.enable_static()
@@ -151,8 +157,10 @@ class TestAbsDoubleGradCheck(unittest.TestCase):
         x_arr[np.abs(x_arr) < 0.005] = 0.002
         gradient_checker.double_grad_check(
             [x], y, x_init=x_arr, place=place, eps=eps)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         gradient_checker.double_grad_check_for_dygraph(
             self.abs_wrapper, [x], y, x_init=x_arr, place=place)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_grad(self):
         paddle.enable_static()
@@ -240,8 +248,10 @@ class TestELUDoubleGradCheck(unittest.TestCase):
         x_arr = np.random.uniform(-1, 1, shape).astype(dtype)
         gradient_checker.double_grad_check(
             [x], y, x_init=x_arr, place=place, eps=eps)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         gradient_checker.double_grad_check_for_dygraph(
             self.elu_wrapper, [x], y, x_init=x_arr, place=place)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_grad(self):
         paddle.enable_static()
@@ -272,8 +282,10 @@ class TestCELUDoubleGradCheck(unittest.TestCase):
         x_arr = np.random.uniform(-1, 1, shape).astype(dtype)
         gradient_checker.double_grad_check(
             [x], y, x_init=x_arr, place=place, eps=eps)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         gradient_checker.double_grad_check_for_dygraph(
             self.celu_wrapper, [x], y, x_init=x_arr, place=place)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_grad(self):
         paddle.enable_static()
@@ -362,8 +374,10 @@ class TestSquareDoubleGradCheck(unittest.TestCase):
 
         gradient_checker.double_grad_check(
             [x], y, x_init=x_arr, place=place, eps=eps)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         gradient_checker.double_grad_check_for_dygraph(
             self.square_wrapper, [x], y, x_init=x_arr, place=place)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_grad(self):
         paddle.enable_static()
@@ -421,8 +435,10 @@ class TestLogDoubleGradCheck(unittest.TestCase):
 
         gradient_checker.double_grad_check(
             [x], y, x_init=x_arr, place=place, eps=eps)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         gradient_checker.double_grad_check_for_dygraph(
             self.log_wrapper, [x], y, x_init=x_arr, place=place)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_grad(self):
         paddle.enable_static()
diff --git a/python/paddle/fluid/tests/unittests/test_assign_op.py b/python/paddle/fluid/tests/unittests/test_assign_op.py
index bfe23c621270d7117c92c7ba06991acc1fb74d37..e1fae5d5aa51abae9d33e120967f03583f0c22ef 100644
--- a/python/paddle/fluid/tests/unittests/test_assign_op.py
+++ b/python/paddle/fluid/tests/unittests/test_assign_op.py
@@ -34,10 +34,14 @@ class TestAssignOp(op_test.OpTest):
         self.outputs = {'Out': x}
 
     def test_forward(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         self.check_output(check_eager=True)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_backward(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         self.check_grad(['X'], 'Out', check_eager=True)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 class TestAssignFP16Op(op_test.OpTest):
@@ -49,14 +53,19 @@ class TestAssignFP16Op(op_test.OpTest):
         self.outputs = {'Out': x}
 
     def test_forward(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         self.check_output(check_eager=True)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_backward(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         self.check_grad(['X'], 'Out', check_eager=True)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 class TestAssignOpWithLoDTensorArray(unittest.TestCase):
     def test_assign_LoDTensorArray(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         main_program = Program()
         startup_program = Program()
         with program_guard(main_program):
@@ -71,6 +80,7 @@ class TestAssignOpWithLoDTensorArray(unittest.TestCase):
             sums = fluid.layers.array_read(array=init_array, i=i)
             mean = fluid.layers.mean(sums)
             append_backward(mean)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
         place = fluid.CUDAPlace(0) if core.is_compiled_with_cuda(
         ) else fluid.CPUPlace()
@@ -173,6 +183,7 @@ class TestAssignOApi(unittest.TestCase):
 
     def test_clone(self):
         paddle.disable_static()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         self.python_api = paddle.clone
 
         x = paddle.ones([2])
@@ -185,6 +196,7 @@ class TestAssignOApi(unittest.TestCase):
         self.assertTrue(np.array_equal(x, [1, 1]), True)
         self.assertTrue(np.array_equal(clone_x.grad.numpy(), [3, 3]), True)
         self.assertTrue(np.array_equal(x.grad.numpy(), [3, 3]), True)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
         paddle.enable_static()
 
         with program_guard(Program(), Program()):
@@ -201,6 +213,7 @@ class TestAssignOApi(unittest.TestCase):
 
 class TestAssignOpErrorApi(unittest.TestCase):
     def test_errors(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with program_guard(Program(), Program()):
             # The type of input must be Variable or numpy.ndarray.
             x1 = fluid.create_lod_tensor(
@@ -209,6 +222,7 @@ class TestAssignOpErrorApi(unittest.TestCase):
             # When the type of input is numpy.ndarray, the dtype of input must be float32, int32.
             x2 = np.array([[2.5, 2.5]], dtype='uint8')
             self.assertRaises(TypeError, paddle.assign, x2)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_type_error(self):
         paddle.enable_static()
diff --git a/python/paddle/fluid/tests/unittests/test_detach.py b/python/paddle/fluid/tests/unittests/test_detach.py
index 8d19a1d3f65cd0e7c9149087336d57b0bdd655f4..8cf88027e376118aad71ad2181dd29a9cdcd155a 100644
--- a/python/paddle/fluid/tests/unittests/test_detach.py
+++ b/python/paddle/fluid/tests/unittests/test_detach.py
@@ -139,10 +139,12 @@ class Test_Detach(unittest.TestCase):
             return x.gradient()
 
     def test_NoDetachMulti_DetachMulti(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         array_no_detach_multi = self.no_detach_multi()
         array_detach_multi = self.detach_multi()
 
         assert not np.array_equal(array_no_detach_multi, array_detach_multi)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_NoDetachSingle_DetachMulti(self):
         array_no_detach_single = self.no_detach_single()
diff --git a/python/paddle/fluid/tests/unittests/test_elementwise_nn_grad.py b/python/paddle/fluid/tests/unittests/test_elementwise_nn_grad.py
index ccfed61185f0cc80c8eef602013253f7fcf89b88..36e5d4d8e096d126f49441e3dfae22260d7e3dda 100644
--- a/python/paddle/fluid/tests/unittests/test_elementwise_nn_grad.py
+++ b/python/paddle/fluid/tests/unittests/test_elementwise_nn_grad.py
@@ -346,11 +346,13 @@ class TestElementwiseMulTripleGradCheck(unittest.TestCase):
 
         gradient_checker.triple_grad_check(
             [x, y], out, x_init=[x_arr, y_arr], place=place, eps=eps)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         gradient_checker.triple_grad_check_for_dygraph(
             self.multiply_wrapper, [x, y],
             out,
             x_init=[x_arr, y_arr],
             place=place)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_grad(self):
         paddle.enable_static()
diff --git a/python/paddle/fluid/tests/unittests/test_elementwise_pow_op.py b/python/paddle/fluid/tests/unittests/test_elementwise_pow_op.py
index 3c9e350360dd10884170c9817edfda02930916a2..79945a10c80f21a03988ceed6451749a41eb57fc 100644
--- a/python/paddle/fluid/tests/unittests/test_elementwise_pow_op.py
+++ b/python/paddle/fluid/tests/unittests/test_elementwise_pow_op.py
@@ -185,6 +185,7 @@ class TestElementwisePowGradOpInt(unittest.TestCase):
         print(self.grad_res, self.grad_x, self.grad_y)
 
     def test_grad(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         places = [fluid.CPUPlace()]
         if fluid.is_compiled_with_cuda():
             places.append(fluid.CUDAPlace(0))
@@ -200,6 +201,7 @@ class TestElementwisePowGradOpInt(unittest.TestCase):
                 self.assertTrue(np.array_equal(res.gradient(), self.grad_res))
                 self.assertTrue(np.array_equal(x.gradient(), self.grad_x))
                 self.assertTrue(np.array_equal(y.gradient(), self.grad_y))
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 if __name__ == '__main__':
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_auto_prune.py b/python/paddle/fluid/tests/unittests/test_imperative_auto_prune.py
index 39b79dd4ba26b6b375404d452789758dddeba89d..ffc5baf5cd2689566f2716392c3cfef636884912 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_auto_prune.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_auto_prune.py
@@ -195,9 +195,11 @@ class TestImperativeAutoPrune(unittest.TestCase):
             self.assertTrue((part2.gradient() == 0).all())
 
     def test_auto_prune3(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_auto_prune3()
         self.func_auto_prune3()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_auto_prune4(self):
         with fluid.dygraph.guard():
@@ -212,9 +214,11 @@ class TestImperativeAutoPrune(unittest.TestCase):
             self.assertTrue((part2.gradient() == 1).all())
 
     def test_auto_prune4(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_auto_prune4()
         self.func_auto_prune4()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_auto_prune5(self):
         with fluid.dygraph.guard():
@@ -229,9 +233,11 @@ class TestImperativeAutoPrune(unittest.TestCase):
             self.assertTrue((part2.gradient() == 0).all())
 
     def test_auto_prune5(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_auto_prune5()
         self.func_auto_prune5()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_auto_prune6(self):
         with fluid.dygraph.guard():
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_basic.py b/python/paddle/fluid/tests/unittests/test_imperative_basic.py
index ebbf681f3dcef9facc5630df76b9f03c84dc50eb..c129f0756cc4bd6da6d90632d057cee02a02e5b6 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_basic.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_basic.py
@@ -479,9 +479,11 @@ class TestImperative(unittest.TestCase):
         self.assertTrue(np.array_equal(dy_grad2, static_grad))
 
     def test_layer_in_out(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_layer_in_out()
         self.func_layer_in_out()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_mlp(self):
         np_inp = np.array([[1.0, 2.0], [3.0, 4.0]], dtype=np.float32)
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_recurrent_usage.py b/python/paddle/fluid/tests/unittests/test_imperative_recurrent_usage.py
index f12ca0a93ffd9441761c2da866c2c811a30c6e68..0579d727dd234470ca2bdd6766db81961d5b388d 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_recurrent_usage.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_recurrent_usage.py
@@ -45,6 +45,7 @@ class TestRecurrentFeed(unittest.TestCase):
         original_np1 = np.arange(1, 5).reshape(2, 2).astype("float32")
         original_np2 = np.arange(5, 9).reshape(2, 2).astype("float32")
         with fluid.dygraph.guard():
+            fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
             fluid.default_startup_program().random_seed = seed
             fluid.default_main_program().random_seed = seed
             original_in1 = to_variable(original_np1)
@@ -61,8 +62,10 @@ class TestRecurrentFeed(unittest.TestCase):
                 dyout = out.gradient()
                 original_in1.stop_gradient = True
                 rt.clear_gradients()
+            fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
         with fluid.dygraph.guard():
+            fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
             with _test_eager_guard():
                 fluid.default_startup_program().random_seed = seed
                 fluid.default_main_program().random_seed = seed
@@ -80,6 +83,7 @@ class TestRecurrentFeed(unittest.TestCase):
                     eager_dyout = out.gradient()
                     original_in1.stop_gradient = True
                     rt.clear_gradients()
+            fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
         with new_program_scope():
             fluid.default_startup_program().random_seed = seed
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_selected_rows.py b/python/paddle/fluid/tests/unittests/test_imperative_selected_rows.py
index 8bb4088dc3bf9a42725806f2c6393b86965b5ea4..05f00cba0c2ce97025d0b7e5b937217e59cf5611 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_selected_rows.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_selected_rows.py
@@ -79,9 +79,11 @@ class TestSimpleNet(unittest.TestCase):
                     paddle.enable_static()
 
     def test_selectedrows_gradient1(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_selectedrows_gradient1()
         self.func_selectedrows_gradient1()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_selectedrows_gradient2(self):
         places = [fluid.CPUPlace()]
@@ -120,9 +122,11 @@ class TestSimpleNet(unittest.TestCase):
                     self.assertTrue(input_emb.gradient() is not None)
 
     def test_selectedrows_gradient2(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_selectedrows_gradient2()
         self.func_selectedrows_gradient2()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 if __name__ == '__main__':
diff --git a/python/paddle/fluid/tests/unittests/test_imperative_triple_grad.py b/python/paddle/fluid/tests/unittests/test_imperative_triple_grad.py
index 3a8a3a96e9a33d52e2407c5097d02d1b1eb09ea2..33ec0df46cd2a830d5da8d54eacdadbbf04f95a4 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_triple_grad.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_triple_grad.py
@@ -209,11 +209,13 @@ class TestDygraphTripleGrad(TestCase):
         self.assertTrue(np.allclose(dddx_grad_actual, dddx_expected))
 
     def test_all_cases(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         self.func_exception()
         self.func_example_with_gradient_and_create_graph()
         with _test_eager_guard():
             self.func_exception()
             self.func_example_with_gradient_and_create_graph()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 class TestDygraphTripleGradBradcastCase(TestCase):
@@ -298,9 +300,11 @@ class TestDygraphTripleGradBradcastCase(TestCase):
         self.assertTrue(np.allclose(dddx_grad_actual, dddx_expected))
 
     def test_all_cases(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         self.func_example_with_gradient_and_create_graph()
         with _test_eager_guard():
             self.func_example_with_gradient_and_create_graph()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 if __name__ == '__main__':
diff --git a/python/paddle/fluid/tests/unittests/test_op_function_generator.py b/python/paddle/fluid/tests/unittests/test_op_function_generator.py
index c712b5db0f31f3433e58ffe9268a9e023e3a6076..eeaf1a012ad5e94e38f4a9d6bdd8385bb65bbce7 100644
--- a/python/paddle/fluid/tests/unittests/test_op_function_generator.py
+++ b/python/paddle/fluid/tests/unittests/test_op_function_generator.py
@@ -74,6 +74,7 @@ class TestVariable(unittest.TestCase):
             self.assertTrue(np.array_equal(res1.numpy(), res2.numpy()))
 
     def test_trace_backward(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with fluid.dygraph.guard():
             a = np.random.uniform(0.1, 1, self.shape).astype(self.dtype)
             b = np.random.uniform(0.1, 1, self.shape).astype(self.dtype)
@@ -90,6 +91,7 @@ class TestVariable(unittest.TestCase):
 
             self.assertTrue(np.array_equal(x_grad, loss.gradient() * b))
             self.assertTrue(np.array_equal(y_grad, loss.gradient() * a))
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_traced_layer(self):
         if in_dygraph_mode():
diff --git a/python/paddle/fluid/tests/unittests/test_set_value_op.py b/python/paddle/fluid/tests/unittests/test_set_value_op.py
index 8f9801780cd9d78db5ae3df773d8d7dcb25bb834..098999501bcb12c1c93fd231ef5d49cf946189b3 100644
--- a/python/paddle/fluid/tests/unittests/test_set_value_op.py
+++ b/python/paddle/fluid/tests/unittests/test_set_value_op.py
@@ -20,6 +20,7 @@ import unittest
 import numpy as np
 
 import paddle
+import paddle.fluid as fluid
 from paddle.fluid.layer_helper import LayerHelper
 from functools import reduce
 from paddle.fluid.framework import _test_eager_guard, _in_legacy_dygraph
@@ -1014,9 +1015,11 @@ class TestBackward(unittest.TestCase):
         self.assertTrue((0 == x.grad[0, :, 0, 0]).all())
 
     def test_dynamic(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_test_dynamic()
         self.func_test_dynamic()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 class TestGradientTruncated(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_sparse_norm_op.py b/python/paddle/fluid/tests/unittests/test_sparse_norm_op.py
index f22d48ae92b0d60feac968d23913218cdec08979..cc917e1ab42928318e666f7c9834a84436a28da1 100644
--- a/python/paddle/fluid/tests/unittests/test_sparse_norm_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sparse_norm_op.py
@@ -16,12 +16,14 @@ from __future__ import print_function
 import unittest
 import numpy as np
 import paddle
+import paddle.fluid as fluid
 from paddle.fluid.framework import _test_eager_guard
 import copy
 
 
 class TestSparseBatchNorm(unittest.TestCase):
     def test(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             paddle.seed(0)
             channels = 4
@@ -59,6 +61,7 @@ class TestSparseBatchNorm(unittest.TestCase):
                 sparse_x.grad.values().flatten().numpy(),
                 atol=1e-5,
                 rtol=1e-5)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_error_layout(self):
         with _test_eager_guard():
diff --git a/python/paddle/fluid/tests/unittests/test_sparse_unary_op.py b/python/paddle/fluid/tests/unittests/test_sparse_unary_op.py
index f3337bce9117c59edc8e24560932fd6cb00d9c84..85afe10349ec6019302441c3a9d6d346abf4a97b 100644
--- a/python/paddle/fluid/tests/unittests/test_sparse_unary_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sparse_unary_op.py
@@ -17,6 +17,7 @@ import unittest
 from typing import Union, Callable
 import numpy as np
 import paddle
+import paddle.fluid as fluid
 from paddle.fluid.framework import _test_eager_guard
 from paddle import _C_ops
 
@@ -42,6 +43,7 @@ class TestSparseUnary(unittest.TestCase):
             return np.allclose(dense_numpy[mask],
                                sparse_tensor.to_dense().numpy()[mask])
 
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             dense_x = paddle.to_tensor(
                 x, dtype="float32", stop_gradient=not test_gradient)
@@ -59,6 +61,7 @@ class TestSparseUnary(unittest.TestCase):
                 dense_out.backward(dense_out)
                 sparse_out.backward(sparse_out)
                 assert tensor_allclose(dense_x.grad, sparse_x.grad)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_sparse_relu(self):
         x = [[0, -1, 0, 2], [0, 0, -3, 0], [4, 5, 0, 0]]
diff --git a/python/paddle/fluid/tests/unittests/test_sparse_utils_op.py b/python/paddle/fluid/tests/unittests/test_sparse_utils_op.py
index 5a5af059951e06343f9a8abb2aa5fe80aad5b11a..31f4092666ef4c86ea479893030cc1db1ee48f68 100644
--- a/python/paddle/fluid/tests/unittests/test_sparse_utils_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sparse_utils_op.py
@@ -16,6 +16,7 @@ from __future__ import print_function
 import unittest
 import numpy as np
 import paddle
+import paddle.fluid as fluid
 import paddle.fluid.core as core
 from paddle.fluid.framework import _test_eager_guard
 
@@ -151,6 +152,7 @@ class TestSparseConvert(unittest.TestCase):
                                   out_grad.to_dense().numpy())
 
     def test_coo_to_dense(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             indices = [[0, 0, 1, 2, 2], [1, 3, 2, 0, 1]]
             values = [1.0, 2.0, 3.0, 4.0, 5.0]
@@ -179,6 +181,7 @@ class TestSparseConvert(unittest.TestCase):
             dense_tensor_cpu.backward(paddle.to_tensor(out_grad))
             assert np.array_equal(correct_x_grad,
                                   sparse_x_cpu.grad.values().numpy())
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_to_sparse_csr(self):
         with _test_eager_guard():
@@ -196,6 +199,7 @@ class TestSparseConvert(unittest.TestCase):
             assert np.array_equal(dense_tensor.numpy(), x)
 
     def test_coo_values_grad(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             indices = [[0, 0, 1, 2, 2], [1, 3, 2, 0, 1]]
             values = [1.0, 2.0, 3.0, 4.0, 5.0]
@@ -223,6 +227,7 @@ class TestSparseConvert(unittest.TestCase):
             # test coo_values_grad
             values_tensor.backward(paddle.to_tensor(out_grad))
             assert np.array_equal(out_grad, sparse_x.grad.values().numpy())
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_sparse_coo_tensor_grad(self):
         with _test_eager_guard():
diff --git a/python/paddle/fluid/tests/unittests/test_tensor_fill_.py b/python/paddle/fluid/tests/unittests/test_tensor_fill_.py
index 2f43f129978cda9e7147dfa245e31e181dbc5a05..4a34b2022b98b20e125533c771146df5bbc787d2 100644
--- a/python/paddle/fluid/tests/unittests/test_tensor_fill_.py
+++ b/python/paddle/fluid/tests/unittests/test_tensor_fill_.py
@@ -78,9 +78,11 @@ class TensorFill_Test(unittest.TestCase):
                 self.assertEqual((y.grad.numpy() == 0).all().item(), True)
 
     def test_tensor_fill_backward(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_test_tensor_fill_backward()
         self.func_test_tensor_fill_backward()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_test_errors(self):
         def test_list():
diff --git a/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_.py b/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_.py
index ca0c97adedb943c19b9b01e7ae9830da57fccdac..2b6d3a5ca5fa184f598ae56f41fa2fe4205037d7 100644
--- a/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_.py
+++ b/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_.py
@@ -52,9 +52,11 @@ class TensorFillDiagonal_Test(unittest.TestCase):
                     True)
 
     def test_dim2_normal(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_dim2_normal()
         self.func_dim2_normal()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_offset(self):
         expected_np = np.array(
@@ -87,9 +89,11 @@ class TensorFillDiagonal_Test(unittest.TestCase):
                     True)
 
     def test_offset(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_offset()
         self.func_offset()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_bool(self):
         expected_np = np.array(
@@ -150,9 +154,11 @@ class TensorFillDiagonal_Test(unittest.TestCase):
                     True)
 
     def test_dim2_unnormal_wrap(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_dim2_unnormal_wrap()
         self.func_dim2_unnormal_wrap()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_dim2_unnormal_unwrap(self):
         expected_np = np.array([[1, 2, 2], [2, 1, 2], [2, 2, 1], [2, 2, 2],
@@ -187,9 +193,11 @@ class TensorFillDiagonal_Test(unittest.TestCase):
                     True)
 
     def test_dim2_unnormal_unwrap(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_dim2_unnormal_unwrap()
         self.func_dim2_unnormal_unwrap()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_dim_larger2_normal(self):
         expected_np = np.array([[[1, 2, 2], [2, 2, 2], [2, 2, 2]], [[2, 2, 2], [
@@ -225,9 +233,11 @@ class TensorFillDiagonal_Test(unittest.TestCase):
                     True)
 
     def test_dim_larger2_normal(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_dim_larger2_normal()
         self.func_dim_larger2_normal()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 if __name__ == '__main__':
diff --git a/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_tensor.py b/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_tensor.py
index 47316809189b7cecc5ad66fa6154dcba1eec6acb..c140b61bdf47c1cd3238d7456cd609082fdb70db 100644
--- a/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_tensor.py
+++ b/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_tensor.py
@@ -28,6 +28,7 @@ class TensorFillDiagTensor_Test(unittest.TestCase):
             self.places.append(fluid.CUDAPlace(0))
 
     def test_dim2(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         expected_np = np.array(
             [[1, 2, 2], [2, 1, 2], [2, 2, 1], [2, 2, 2]]).astype('float32')
         expected_grad = np.array(
@@ -53,8 +54,10 @@ class TensorFillDiagTensor_Test(unittest.TestCase):
                 self.assertEqual(
                     (y.grad.numpy().astype('float32') == expected_grad).all(),
                     True)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_dim2_offset_1(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         expected_np = np.array(
             [[2, 2, 2], [1, 2, 2], [2, 1, 2], [2, 2, 1]]).astype('float32')
         expected_grad = np.array(
@@ -80,8 +83,10 @@ class TensorFillDiagTensor_Test(unittest.TestCase):
                 self.assertEqual(
                     (y.grad.numpy().astype('float32') == expected_grad).all(),
                     True)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_dim2_offset1(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         expected_np = np.array(
             [[2, 1, 2], [2, 2, 1], [2, 2, 2], [2, 2, 2]]).astype('float32')
         expected_grad = np.array(
@@ -107,8 +112,10 @@ class TensorFillDiagTensor_Test(unittest.TestCase):
                 self.assertEqual(
                     (y.grad.numpy().astype('float32') == expected_grad).all(),
                     True)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_dim4(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         expected_np = np.array(
             [[[[0, 3], [2, 2], [2, 2]], [[2, 2], [1, 4], [2, 2]],
               [[2, 2], [2, 2], [2, 5]], [[2, 2], [2, 2], [2, 2]]],
@@ -143,6 +150,7 @@ class TensorFillDiagTensor_Test(unittest.TestCase):
                 self.assertEqual(
                     (y.grad.numpy().astype('float32') == expected_grad).all(),
                     True)
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def test_largedim(self):
         if len(self.places) > 1:
diff --git a/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_tensor_.py b/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_tensor_.py
index 81ec1daa6691d3e48c91777e08710ea98b0f3a62..0bab3ec10d7b762675f69175e70c819b1aed4150 100644
--- a/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_tensor_.py
+++ b/python/paddle/fluid/tests/unittests/test_tensor_fill_diagonal_tensor_.py
@@ -56,9 +56,11 @@ class TensorFillDiagTensor_Test(unittest.TestCase):
                     True)
 
     def test_dim2(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_dim2()
         self.func_dim2()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_dim2_offset_1(self):
         expected_np = np.array(
@@ -88,9 +90,11 @@ class TensorFillDiagTensor_Test(unittest.TestCase):
                     True)
 
     def test_dim2_offset_1(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_dim2_offset_1()
         self.func_dim2_offset_1()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_dim2_offset1(self):
         expected_np = np.array(
@@ -120,9 +124,11 @@ class TensorFillDiagTensor_Test(unittest.TestCase):
                     True)
 
     def test_dim2_offset1(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_dim2_offset1()
         self.func_dim2_offset1()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_dim4(self):
         expected_np = np.array(
@@ -161,9 +167,11 @@ class TensorFillDiagTensor_Test(unittest.TestCase):
                     True)
 
     def test_func_dim4(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_dim4()
         self.func_dim4()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_largedim(self):
         #large dim only test on gpu because the cpu version is too slow for ci test, and the memory is limited
@@ -190,9 +198,11 @@ class TensorFillDiagTensor_Test(unittest.TestCase):
                 self.assertEqual((y.grad == expected_grad).all(), True)
 
     def test_largedim(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_largedim()
         self.func_largedim()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 if __name__ == '__main__':
diff --git a/python/paddle/fluid/tests/unittests/test_tensor_register_hook.py b/python/paddle/fluid/tests/unittests/test_tensor_register_hook.py
index e7f85f0451a1728a1c569e888f0de2b14436dfea..d725a672c34f50bdd6d81bb4cba7e0299ee12ec2 100644
--- a/python/paddle/fluid/tests/unittests/test_tensor_register_hook.py
+++ b/python/paddle/fluid/tests/unittests/test_tensor_register_hook.py
@@ -158,9 +158,11 @@ class TestTensorRegisterHook(unittest.TestCase):
         run_print_hook_for_interior_var(print_hook, removed=True)
 
     def test_hook_for_interior_var(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_hook_for_interior_var()
         self.func_hook_for_interior_var()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_hook_for_leaf_var(self):
         def run_double_hook_for_leaf_var(double_hook, removed=False):
@@ -202,9 +204,11 @@ class TestTensorRegisterHook(unittest.TestCase):
         run_double_hook_for_leaf_var(lambda grad: grad * 2, removed=True)
 
     def test_hook_for_leaf_var(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_hook_for_leaf_var()
         self.func_hook_for_leaf_var()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_hook_for_accumulated_grad_interior_var(self):
         def run_double_hook_for_accumulated_grad_interior_var(double_hook,
@@ -262,9 +266,11 @@ class TestTensorRegisterHook(unittest.TestCase):
             lambda grad: grad * 2, removed=True)
 
     def test_hook_for_accumulated_grad_interior_var(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_hook_for_accumulated_grad_interior_var()
         self.func_hook_for_accumulated_grad_interior_var()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_hook_for_accumulated_grad_leaf_var(self):
         def run_double_hook_for_accumulated_grad_leaf_var(double_hook,
@@ -360,9 +366,11 @@ class TestTensorRegisterHook(unittest.TestCase):
         self.assertTrue(np.array_equal(linear1_b_grad, linear1_b_grad_rm))
 
     def test_func_hook_in_model(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_hook_in_model()
         self.func_hook_in_model()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_multiple_hooks_for_interior_var(self):
         def run_multiple_hooks_for_interior_var(device,
@@ -443,9 +451,11 @@ class TestTensorRegisterHook(unittest.TestCase):
             self.assertTrue(np.array_equal(y_grad, z))
 
     def test_multiple_hooks_for_interior_var(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
         with _test_eager_guard():
             self.func_multiple_hooks_for_interior_var()
         self.func_multiple_hooks_for_interior_var()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
     def func_hook_in_double_grad(self):
         def double_print_hook(grad):
diff --git a/python/paddle/fluid/tests/unittests/test_uniform_random_inplace_op.py b/python/paddle/fluid/tests/unittests/test_uniform_random_inplace_op.py
index ec3aeb24239135eb4ecc1937dc3868b4671d024f..e7c88dd8398788269484df8a570c4863fa600eeb 100644
--- a/python/paddle/fluid/tests/unittests/test_uniform_random_inplace_op.py
+++ b/python/paddle/fluid/tests/unittests/test_uniform_random_inplace_op.py
@@ -158,6 +158,8 @@ class TestUniformRandomInplaceGrad(unittest.TestCase):
         self.shape = (1000, 784)
 
     def test_uniform_random_inplace_grad(self):
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": True})
+
         def test_grad():
             tensor_a = paddle.ones(self.shape)
             tensor_a.stop_gradient = False
@@ -174,6 +176,7 @@ class TestUniformRandomInplaceGrad(unittest.TestCase):
         for place in places:
             paddle.set_device(place)
             test_grad()
+        fluid.set_flags({"FLAGS_retain_grad_for_all_tensor": False})
 
 
 if __name__ == '__main__':