diff --git a/python/paddle/fluid/tests/unittests/benchmark.py b/python/paddle/fluid/tests/unittests/benchmark.py
index 92559965497710e6bd5dd3038a34723f16bde533..f3c48d3d7f4b8613f9f98f468aa6232971994196 100644
--- a/python/paddle/fluid/tests/unittests/benchmark.py
+++ b/python/paddle/fluid/tests/unittests/benchmark.py
@@ -20,7 +20,7 @@ import itertools
 import paddle.fluid as fluid
 import paddle.fluid.core as core
 from paddle.fluid.op import Operator
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class BenchmarkSuite(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/benchmark_sum_op.py b/python/paddle/fluid/tests/unittests/benchmark_sum_op.py
index b222320d7c36ba59e7d4984728196121a650380d..91a5f1bca4441d80489a02eb9283928e38321826 100644
--- a/python/paddle/fluid/tests/unittests/benchmark_sum_op.py
+++ b/python/paddle/fluid/tests/unittests/benchmark_sum_op.py
@@ -16,8 +16,8 @@ import unittest
 import numpy as np
 
 import paddle.fluid as fluid
-from .benchmark import BenchmarkSuite
-from .op_test import OpTest
+from benchmark import BenchmarkSuite
+from op_test import OpTest
 
 # This is a demo op test case for operator benchmarking and high resolution number stability alignment.
 
diff --git a/python/paddle/fluid/tests/unittests/op_test.py b/python/paddle/fluid/tests/unittests/op_test.py
index d6b730add7d869715be02e690a6a26c6f3bec0b0..d5bdc28c5d6080cd3e94935b76b2948db07e3c2f 100644
--- a/python/paddle/fluid/tests/unittests/op_test.py
+++ b/python/paddle/fluid/tests/unittests/op_test.py
@@ -25,7 +25,7 @@ from paddle.fluid.backward import append_backward
 from paddle.fluid.op import Operator
 from paddle.fluid.executor import Executor
 from paddle.fluid.framework import Program, OpProtoHolder, Variable
-from .testsuite import create_op, set_input, append_input_output, append_loss_ops
+from testsuite import create_op, set_input, append_input_output, append_loss_ops
 from functools import reduce
 from six.moves import zip
 
diff --git a/python/paddle/fluid/tests/unittests/test_accuracy_op.py b/python/paddle/fluid/tests/unittests/test_accuracy_op.py
index f6958cc8932491e3ce57f8e214a8d3e16332af8e..db1861fd10e371ebe631a16380af591875886769 100644
--- a/python/paddle/fluid/tests/unittests/test_accuracy_op.py
+++ b/python/paddle/fluid/tests/unittests/test_accuracy_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestAccuracyOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_activation_mkldnn_op.py b/python/paddle/fluid/tests/unittests/test_activation_mkldnn_op.py
index 99913a94f86422445f5887cbfd4eeeff2baec404..7d554c2276c9acd710d14c8f8b32c802e3e17515 100644
--- a/python/paddle/fluid/tests/unittests/test_activation_mkldnn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_activation_mkldnn_op.py
@@ -15,9 +15,9 @@
 import unittest
 import numpy as np
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 from scipy.special import expit
-from .test_activation_op import TestRelu, TestTanh, TestSqrt, TestAbs
+from test_activation_op import TestRelu, TestTanh, TestSqrt, TestAbs
 
 
 class TestMKLDNNReluDim2(TestRelu):
diff --git a/python/paddle/fluid/tests/unittests/test_activation_op.py b/python/paddle/fluid/tests/unittests/test_activation_op.py
index d12aec885b3d92ebc8dce345693b6d31ac01f667..5ed387fb1247f1a91147cb6981f1adc7c2eeb8a2 100644
--- a/python/paddle/fluid/tests/unittests/test_activation_op.py
+++ b/python/paddle/fluid/tests/unittests/test_activation_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 from scipy.special import expit
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_adadelta_op.py b/python/paddle/fluid/tests/unittests/test_adadelta_op.py
index c8fa469270f51d7b785562c523b51a5eb45d422b..1b892e64c7654a1a3905672813452650885790a5 100644
--- a/python/paddle/fluid/tests/unittests/test_adadelta_op.py
+++ b/python/paddle/fluid/tests/unittests/test_adadelta_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestAdadeltaOp1(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_adagrad_op.py b/python/paddle/fluid/tests/unittests/test_adagrad_op.py
index 1f4432782babeb5f38d1494ffae795cbf964be7f..2f0ea79f4d6afe91ee7e0d747f3d8f4884d8f9ee 100644
--- a/python/paddle/fluid/tests/unittests/test_adagrad_op.py
+++ b/python/paddle/fluid/tests/unittests/test_adagrad_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 import paddle.fluid.core as core
 from paddle.fluid.op import Operator
-from .op_test import OpTest
+from op_test import OpTest
 import math
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_adam_op.py b/python/paddle/fluid/tests/unittests/test_adam_op.py
index 1ff9bf9be19d73e5739cf4612d463312915a2fe4..fa4b39879c0ede569b6802502b2c71a93b163373 100644
--- a/python/paddle/fluid/tests/unittests/test_adam_op.py
+++ b/python/paddle/fluid/tests/unittests/test_adam_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 from paddle.fluid import core
 from paddle.fluid.op import Operator
 
diff --git a/python/paddle/fluid/tests/unittests/test_adamax_op.py b/python/paddle/fluid/tests/unittests/test_adamax_op.py
index 668303ea2c933668726dcf47d304244d74dde0f2..8099beefa583d152715334e83f0c6e8e4a3e7a0d 100644
--- a/python/paddle/fluid/tests/unittests/test_adamax_op.py
+++ b/python/paddle/fluid/tests/unittests/test_adamax_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestAdamaxOp1(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_anchor_generator_op.py b/python/paddle/fluid/tests/unittests/test_anchor_generator_op.py
index 2c22e3c5e2ea0899b48862c9bf7243854bce6779..9c7d5d41f0c512a9fb609dce304c1eed929d28b5 100644
--- a/python/paddle/fluid/tests/unittests/test_anchor_generator_op.py
+++ b/python/paddle/fluid/tests/unittests/test_anchor_generator_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 import sys
 import math
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def anchor_generator_in_python(input_feat, anchor_sizes, aspect_ratios,
diff --git a/python/paddle/fluid/tests/unittests/test_arg_min_max_op.py b/python/paddle/fluid/tests/unittests/test_arg_min_max_op.py
index 22f03ede1797cf10efc70fe33ee6a6ddef690409..e04412f809cdd75d07d28a60f0c2f19041a684f6 100644
--- a/python/paddle/fluid/tests/unittests/test_arg_min_max_op.py
+++ b/python/paddle/fluid/tests/unittests/test_arg_min_max_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class BaseTestCase(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_argsort_op.py b/python/paddle/fluid/tests/unittests/test_argsort_op.py
index 7f6c0db448be18691217446ab93f4db645c2fcfc..b29a102a3880406156481fdac54ca7043d3415db 100644
--- a/python/paddle/fluid/tests/unittests/test_argsort_op.py
+++ b/python/paddle/fluid/tests/unittests/test_argsort_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestArgsortOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_assign_op.py b/python/paddle/fluid/tests/unittests/test_assign_op.py
index 872f4df2339cbd58a65572d3c967674e727d7ac5..e93c02bd3ee9f710cbb9bff4e195dfc3caabe422 100644
--- a/python/paddle/fluid/tests/unittests/test_assign_op.py
+++ b/python/paddle/fluid/tests/unittests/test_assign_op.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from . import op_test
+import op_test
 import numpy
 import unittest
 
diff --git a/python/paddle/fluid/tests/unittests/test_assign_value_op.py b/python/paddle/fluid/tests/unittests/test_assign_value_op.py
index 1c13446faa0225a335efb80a9346065dbd1fb01f..02f2e6eddc80fcce4ca5a444cff82db355c085ca 100644
--- a/python/paddle/fluid/tests/unittests/test_assign_value_op.py
+++ b/python/paddle/fluid/tests/unittests/test_assign_value_op.py
@@ -14,7 +14,7 @@
 
 import paddle.fluid as fluid
 import paddle.fluid.layers as layers
-from . import op_test
+import op_test
 import numpy
 import unittest
 import paddle.fluid.framework as framework
diff --git a/python/paddle/fluid/tests/unittests/test_auc_op.py b/python/paddle/fluid/tests/unittests/test_auc_op.py
index 48b63a1b237b331785927a0f7b017b8f0592a3e1..6580c70ca68c4ba24919f03d071f6f88fb68953c 100644
--- a/python/paddle/fluid/tests/unittests/test_auc_op.py
+++ b/python/paddle/fluid/tests/unittests/test_auc_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 from paddle.fluid import metrics
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_batch_norm_mkldnn_op.py b/python/paddle/fluid/tests/unittests/test_batch_norm_mkldnn_op.py
index 1317906e5f3357452d25986de405dd185f6f40ff..18fa5461590134d2032a29e40699109c12092c6d 100644
--- a/python/paddle/fluid/tests/unittests/test_batch_norm_mkldnn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_batch_norm_mkldnn_op.py
@@ -17,9 +17,9 @@ import numpy as np
 import paddle.fluid.core as core
 from paddle.fluid.op import Operator
 import paddle.fluid as fluid
-from .op_test import OpTest
+from op_test import OpTest
 from paddle.fluid.framework import grad_var_name
-from .test_batch_norm_op import TestBatchNormOpInference, TestBatchNormOpTraining, _reference_training, _reference_grad
+from test_batch_norm_op import TestBatchNormOpInference, TestBatchNormOpTraining, _reference_training, _reference_grad
 
 
 class TestMKLDNNBatchNormOpTraining(TestBatchNormOpTraining):
diff --git a/python/paddle/fluid/tests/unittests/test_batch_norm_op.py b/python/paddle/fluid/tests/unittests/test_batch_norm_op.py
index d83f82665f2b8276a8526cdbb066e59faa2a59fa..f805fdc35f624bf6e9d94d66839dcb2a0143a29b 100644
--- a/python/paddle/fluid/tests/unittests/test_batch_norm_op.py
+++ b/python/paddle/fluid/tests/unittests/test_batch_norm_op.py
@@ -17,7 +17,7 @@ import numpy as np
 import paddle.fluid.core as core
 from paddle.fluid.op import Operator
 import paddle.fluid as fluid
-from .op_test import OpTest
+from op_test import OpTest
 from paddle.fluid.framework import grad_var_name
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_bilinear_interp_op.py b/python/paddle/fluid/tests/unittests/test_bilinear_interp_op.py
index 7a0945060ae8b1c074daf7d4126aaaa5feec5f06..b04f25ef874cc6204211a4f5f5991a0ec8c473dd 100644
--- a/python/paddle/fluid/tests/unittests/test_bilinear_interp_op.py
+++ b/python/paddle/fluid/tests/unittests/test_bilinear_interp_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 import paddle.fluid.core as core
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_bilinear_tensor_product_op.py b/python/paddle/fluid/tests/unittests/test_bilinear_tensor_product_op.py
index 83440ddda26ae81fde9085ca626630f731790cc5..d20a11e27eaac12534ea33c398247adb8db01d4b 100644
--- a/python/paddle/fluid/tests/unittests/test_bilinear_tensor_product_op.py
+++ b/python/paddle/fluid/tests/unittests/test_bilinear_tensor_product_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestBilinearTensorProductOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_bipartite_match_op.py b/python/paddle/fluid/tests/unittests/test_bipartite_match_op.py
index dba93a8fd0730f70177623027466d7b6f6e9c8b2..ceeca25b74d85ed2874d672e402e3186c4ce7d47 100644
--- a/python/paddle/fluid/tests/unittests/test_bipartite_match_op.py
+++ b/python/paddle/fluid/tests/unittests/test_bipartite_match_op.py
@@ -13,7 +13,7 @@
 #limitations under the License.
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def bipartite_match(distance, match_indices, match_dist):
diff --git a/python/paddle/fluid/tests/unittests/test_box_coder_op.py b/python/paddle/fluid/tests/unittests/test_box_coder_op.py
index 99449177db62a341c6edfb23a76993a50194c667..4ce9a4783e2332b6882164a70e1462c6a6d31bef 100644
--- a/python/paddle/fluid/tests/unittests/test_box_coder_op.py
+++ b/python/paddle/fluid/tests/unittests/test_box_coder_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 import sys
 import math
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def box_coder(target_box, prior_box, prior_box_var, output_box, code_type,
diff --git a/python/paddle/fluid/tests/unittests/test_cast_op.py b/python/paddle/fluid/tests/unittests/test_cast_op.py
index 164c28917f49be9a77c9d4d161f7cde8c3ae4ec6..b8d3ed3aa3eb0e47e79f46cdf681a3b9cca46036 100644
--- a/python/paddle/fluid/tests/unittests/test_cast_op.py
+++ b/python/paddle/fluid/tests/unittests/test_cast_op.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from . import op_test
+import op_test
 import unittest
 import numpy as np
 import paddle.fluid.core as core
diff --git a/python/paddle/fluid/tests/unittests/test_chunk_eval_op.py b/python/paddle/fluid/tests/unittests/test_chunk_eval_op.py
index be95b6092ef6475faedf02553a8d4498f8a29135..354110f1f96f6b4aad1a4866c8d1337dec3acd16 100644
--- a/python/paddle/fluid/tests/unittests/test_chunk_eval_op.py
+++ b/python/paddle/fluid/tests/unittests/test_chunk_eval_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class Segment(object):
diff --git a/python/paddle/fluid/tests/unittests/test_clip_by_norm_op.py b/python/paddle/fluid/tests/unittests/test_clip_by_norm_op.py
index a4b8122f2f28845b74f7f810832ba3477022611d..129958fa2818418dccce91683a9424e6324c6ac2 100644
--- a/python/paddle/fluid/tests/unittests/test_clip_by_norm_op.py
+++ b/python/paddle/fluid/tests/unittests/test_clip_by_norm_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestClipByNormOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_clip_op.py b/python/paddle/fluid/tests/unittests/test_clip_op.py
index c542bdd76f099b86480ff6450d61359889967e00..3df80c8ec8fa39c0aaa2b8726fe3b37aef488442 100644
--- a/python/paddle/fluid/tests/unittests/test_clip_op.py
+++ b/python/paddle/fluid/tests/unittests/test_clip_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestClipOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_compare_op.py b/python/paddle/fluid/tests/unittests/test_compare_op.py
index 3d8ed33f3b92c26cdf42141ec31efd5a3648b773..405afebae85eaae6f6af0012058ad58c8bb69a2f 100644
--- a/python/paddle/fluid/tests/unittests/test_compare_op.py
+++ b/python/paddle/fluid/tests/unittests/test_compare_op.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from . import op_test
+import op_test
 import unittest
 import numpy
 
diff --git a/python/paddle/fluid/tests/unittests/test_concat_op.py b/python/paddle/fluid/tests/unittests/test_concat_op.py
index e71805b93250df87172b6ff931cda3d221ce5964..e9f3c45dc40b3333fe7304f8e4313d156bd5374c 100644
--- a/python/paddle/fluid/tests/unittests/test_concat_op.py
+++ b/python/paddle/fluid/tests/unittests/test_concat_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestConcatOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_conv2d_mkldnn_op.py b/python/paddle/fluid/tests/unittests/test_conv2d_mkldnn_op.py
index 3e4739805aede30b07cbd23f0f50d776a3dd29a2..db6be21baaa54d33af9f5c44d1815e4b389eb884 100644
--- a/python/paddle/fluid/tests/unittests/test_conv2d_mkldnn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_conv2d_mkldnn_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 
-from .test_conv2d_op import TestConv2dOp, TestWithPad, TestWithStride
+from test_conv2d_op import TestConv2dOp, TestWithPad, TestWithStride
 
 
 class TestMKLDNN(TestConv2dOp):
diff --git a/python/paddle/fluid/tests/unittests/test_conv2d_op.py b/python/paddle/fluid/tests/unittests/test_conv2d_op.py
index 71f421ee484984b68dff8568ac8da5b0000dcfd5..a478649541ba9828e55c4239090d5aee554223ac 100644
--- a/python/paddle/fluid/tests/unittests/test_conv2d_op.py
+++ b/python/paddle/fluid/tests/unittests/test_conv2d_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def conv2d_forward_naive(input, filter, group, conv_param):
diff --git a/python/paddle/fluid/tests/unittests/test_conv2d_transpose_op.py b/python/paddle/fluid/tests/unittests/test_conv2d_transpose_op.py
index eb3bdbdde52e950d849d426f52707e688c17bf90..af6cd99b0d7e6b0a2dfd4fc1d33e8390017a5906 100644
--- a/python/paddle/fluid/tests/unittests/test_conv2d_transpose_op.py
+++ b/python/paddle/fluid/tests/unittests/test_conv2d_transpose_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def conv2dtranspose_forward_naive(input_, filter_, attrs):
diff --git a/python/paddle/fluid/tests/unittests/test_conv3d_op.py b/python/paddle/fluid/tests/unittests/test_conv3d_op.py
index f0eec4de0a0705e42c613b3f73ddea6d15ecab57..dd4ef7cc94ea1e8de5fe4775408389907d47d0d6 100644
--- a/python/paddle/fluid/tests/unittests/test_conv3d_op.py
+++ b/python/paddle/fluid/tests/unittests/test_conv3d_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def conv3d_forward_naive(input, filter, group, conv_param):
diff --git a/python/paddle/fluid/tests/unittests/test_conv3d_transpose_op.py b/python/paddle/fluid/tests/unittests/test_conv3d_transpose_op.py
index 6500044b736f387ea29de92cc51981b12ba9b690..300fa5e8bde001e0f66c5f924a81c30add99aead 100644
--- a/python/paddle/fluid/tests/unittests/test_conv3d_transpose_op.py
+++ b/python/paddle/fluid/tests/unittests/test_conv3d_transpose_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def conv3dtranspose_forward_naive(input_, filter_, attrs):
diff --git a/python/paddle/fluid/tests/unittests/test_conv_shift_op.py b/python/paddle/fluid/tests/unittests/test_conv_shift_op.py
index 4b8d76114c2d6ddaa359632dcfb1bfa13563e987..9fdb7baa90d2184c3c439e76b6bb5f0668f5f9ee 100644
--- a/python/paddle/fluid/tests/unittests/test_conv_shift_op.py
+++ b/python/paddle/fluid/tests/unittests/test_conv_shift_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def conv_shift_forward(x, y):
diff --git a/python/paddle/fluid/tests/unittests/test_cos_sim_op.py b/python/paddle/fluid/tests/unittests/test_cos_sim_op.py
index 6da63d786e0387a7f295aede711872505847ba2d..1b27cd57670e6c9db5eae6b226989a5c772866ce 100644
--- a/python/paddle/fluid/tests/unittests/test_cos_sim_op.py
+++ b/python/paddle/fluid/tests/unittests/test_cos_sim_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestCosSimOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_crf_decoding_op.py b/python/paddle/fluid/tests/unittests/test_crf_decoding_op.py
index b77b7a5dff34201ad18b73460061d54bc2f9227b..122b076c2d3e3a69f52a2c335e2bc89707b4fa9b 100644
--- a/python/paddle/fluid/tests/unittests/test_crf_decoding_op.py
+++ b/python/paddle/fluid/tests/unittests/test_crf_decoding_op.py
@@ -16,7 +16,7 @@ import unittest
 import random
 import numpy as np
 
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class CRFDecoding(object):
diff --git a/python/paddle/fluid/tests/unittests/test_crop_op.py b/python/paddle/fluid/tests/unittests/test_crop_op.py
index 94fc17a4b0504e1609c56bfbb8402664f3f3264c..4016089c01644f0389855ab114360f90c50a1bbe 100644
--- a/python/paddle/fluid/tests/unittests/test_crop_op.py
+++ b/python/paddle/fluid/tests/unittests/test_crop_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def crop(data, offsets, crop_shape):
diff --git a/python/paddle/fluid/tests/unittests/test_cross_entropy_op.py b/python/paddle/fluid/tests/unittests/test_cross_entropy_op.py
index 1b19a9c0f8d3b89fdb62e4f4aab8c44df34b21f9..c5b9e92d69133e593a2ce223e83006eda590daa5 100644
--- a/python/paddle/fluid/tests/unittests/test_cross_entropy_op.py
+++ b/python/paddle/fluid/tests/unittests/test_cross_entropy_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest, randomize_probability
+from op_test import OpTest, randomize_probability
 
 
 class TestCrossEntropyOp1(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_ctc_align.py b/python/paddle/fluid/tests/unittests/test_ctc_align.py
index ba8e9ba53d047c34f61cf25fe768469e260f72bb..131b4076f45ae25b45bb3f64da07a5c3aacc43d5 100644
--- a/python/paddle/fluid/tests/unittests/test_ctc_align.py
+++ b/python/paddle/fluid/tests/unittests/test_ctc_align.py
@@ -15,8 +15,8 @@
 import sys
 import unittest
 import numpy as np
-from .op_test import OpTest
-from .test_softmax_op import stable_softmax
+from op_test import OpTest
+from test_softmax_op import stable_softmax
 
 
 def CTCAlign(input, lod, blank, merge_repeated):
diff --git a/python/paddle/fluid/tests/unittests/test_cumsum_op.py b/python/paddle/fluid/tests/unittests/test_cumsum_op.py
index a7a509ff8599793658373b4f828e2c92adbfc576..04e7f0b94510987a1872c2d625ac4d29a3c6feba 100644
--- a/python/paddle/fluid/tests/unittests/test_cumsum_op.py
+++ b/python/paddle/fluid/tests/unittests/test_cumsum_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSumOp1(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_decayed_adagrad_op.py b/python/paddle/fluid/tests/unittests/test_decayed_adagrad_op.py
index 484193b85435c21fa31669d0365f629b30a2d1e0..84c44d4817366518a2cbc3f0a777ab32b67f3d11 100644
--- a/python/paddle/fluid/tests/unittests/test_decayed_adagrad_op.py
+++ b/python/paddle/fluid/tests/unittests/test_decayed_adagrad_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestDecayedAdagradOp1(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_detection_map_op.py b/python/paddle/fluid/tests/unittests/test_detection_map_op.py
index a71447ebe30ee857e21b71a5c24957bb13ad40d1..8b66d1b270980a18fd1bbd068917e982a450ad6f 100644
--- a/python/paddle/fluid/tests/unittests/test_detection_map_op.py
+++ b/python/paddle/fluid/tests/unittests/test_detection_map_op.py
@@ -17,7 +17,7 @@ import numpy as np
 import sys
 import collections
 import math
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestDetectionMAPOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_dropout_op.py b/python/paddle/fluid/tests/unittests/test_dropout_op.py
index 0b1e1e9388a089dae3d880a920882754c71a4c44..eaa3435a86462236a99489749abe877648677053 100644
--- a/python/paddle/fluid/tests/unittests/test_dropout_op.py
+++ b/python/paddle/fluid/tests/unittests/test_dropout_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestDropoutOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_dynrnn_gradient_check.py b/python/paddle/fluid/tests/unittests/test_dynrnn_gradient_check.py
index 0cb57f45b005d229043521b32a844359e5823b59..5b204a1ed6e6a9fadd3f274ad543615c2ebfbb73 100644
--- a/python/paddle/fluid/tests/unittests/test_dynrnn_gradient_check.py
+++ b/python/paddle/fluid/tests/unittests/test_dynrnn_gradient_check.py
@@ -17,7 +17,7 @@ import random
 import collections
 import paddle.fluid as fluid
 import unittest
-from .decorators import *
+from decorators import *
 
 
 class Memory(object):
diff --git a/python/paddle/fluid/tests/unittests/test_edit_distance_op.py b/python/paddle/fluid/tests/unittests/test_edit_distance_op.py
index 00abd19cd90ad564ed48b814e7972f9db782e0b8..816562621b4fc749f3c6b0eca8ee3c5850ef1ba9 100644
--- a/python/paddle/fluid/tests/unittests/test_edit_distance_op.py
+++ b/python/paddle/fluid/tests/unittests/test_edit_distance_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def Levenshtein(hyp, ref):
diff --git a/python/paddle/fluid/tests/unittests/test_elementwise_add_mkldnn_op.py b/python/paddle/fluid/tests/unittests/test_elementwise_add_mkldnn_op.py
index afdbabd6a2ac9274fa58c8f79f512af8c5f13257..bcdbfc8e527d0dc9a95eddaf040f8035207b6c20 100644
--- a/python/paddle/fluid/tests/unittests/test_elementwise_add_mkldnn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_elementwise_add_mkldnn_op.py
@@ -14,8 +14,8 @@
 import unittest
 import numpy as np
 import paddle.fluid.core as core
-from .op_test import OpTest
-from .test_elementwise_add_op import *
+from op_test import OpTest
+from test_elementwise_add_op import *
 '''
 Some tests differ from the tests defined in test_elementwise_add_op.py
 because MKLDNN does not support tensors of number of dimensions 3.
diff --git a/python/paddle/fluid/tests/unittests/test_elementwise_add_op.py b/python/paddle/fluid/tests/unittests/test_elementwise_add_op.py
index 432901fbb074c6f0fe2bafe0c75fa3b41043491a..fb9a496126f0b6efcad73590c78efe5a47b88cd6 100644
--- a/python/paddle/fluid/tests/unittests/test_elementwise_add_op.py
+++ b/python/paddle/fluid/tests/unittests/test_elementwise_add_op.py
@@ -14,7 +14,7 @@
 import unittest
 import numpy as np
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestElementwiseAddOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_elementwise_div_op.py b/python/paddle/fluid/tests/unittests/test_elementwise_div_op.py
index 4244e1132a2adbc74298b6a520fa2d35461441eb..bfe022af6dac711e76678b79005d4cfff90c2a2b 100644
--- a/python/paddle/fluid/tests/unittests/test_elementwise_div_op.py
+++ b/python/paddle/fluid/tests/unittests/test_elementwise_div_op.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class ElementwiseDivOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_elementwise_max_op.py b/python/paddle/fluid/tests/unittests/test_elementwise_max_op.py
index 3796d0af92d52f9110f51b67556853b0d5329b93..b6cd18a579520f921feed48cc86d8027f6a7bd1e 100644
--- a/python/paddle/fluid/tests/unittests/test_elementwise_max_op.py
+++ b/python/paddle/fluid/tests/unittests/test_elementwise_max_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestElementwiseOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_elementwise_min_op.py b/python/paddle/fluid/tests/unittests/test_elementwise_min_op.py
index 826e8a9619a9747d927050ef0e3681e198455425..92099724fe65050b62c738f4e6c269a0ca3f4ef1 100644
--- a/python/paddle/fluid/tests/unittests/test_elementwise_min_op.py
+++ b/python/paddle/fluid/tests/unittests/test_elementwise_min_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestElementwiseOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_elementwise_mul_op.py b/python/paddle/fluid/tests/unittests/test_elementwise_mul_op.py
index 5195f7b5f21696a673a6d431f49277c92e29fc62..2742bb21d95ed3363e82a70b0172cc787878abd9 100644
--- a/python/paddle/fluid/tests/unittests/test_elementwise_mul_op.py
+++ b/python/paddle/fluid/tests/unittests/test_elementwise_mul_op.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class ElementwiseMulOp(OpTest):
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 be9f82943f0b16d98c82d9a97a62e4f80ed7c4e5..a3fd18669c556701b2586e88ddbb89ca79549a86 100644
--- a/python/paddle/fluid/tests/unittests/test_elementwise_pow_op.py
+++ b/python/paddle/fluid/tests/unittests/test_elementwise_pow_op.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestElementwisePowOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_elementwise_sub_op.py b/python/paddle/fluid/tests/unittests/test_elementwise_sub_op.py
index bbf113aed2db4e526a3aedcfa11722c6d1b0c79d..acf652d3fb9743d69b7f7e248ff7a3ee83fc4c50 100644
--- a/python/paddle/fluid/tests/unittests/test_elementwise_sub_op.py
+++ b/python/paddle/fluid/tests/unittests/test_elementwise_sub_op.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestElementwiseOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_expand_op.py b/python/paddle/fluid/tests/unittests/test_expand_op.py
index 8239ea7ae7c6f61ced07e1a242d1865feb9f58e9..a91e3aef5a18a681f3baf405da2beebb8c85360c 100644
--- a/python/paddle/fluid/tests/unittests/test_expand_op.py
+++ b/python/paddle/fluid/tests/unittests/test_expand_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestExpandOpRank1(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_fake_dequantize_op.py b/python/paddle/fluid/tests/unittests/test_fake_dequantize_op.py
index b0a773bf208a905f7b164e7ecdd724d8f018c70f..026ac2112b2d78644b3315b9cab8019ca27e9714 100644
--- a/python/paddle/fluid/tests/unittests/test_fake_dequantize_op.py
+++ b/python/paddle/fluid/tests/unittests/test_fake_dequantize_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import math
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def quantize_max_abs(x, num_bits):
diff --git a/python/paddle/fluid/tests/unittests/test_fake_quantize_op.py b/python/paddle/fluid/tests/unittests/test_fake_quantize_op.py
index 72fba806091e6ec5c30b14865423c7fba1b56581..6c6aa9d3bb656740c528c728efafc6a47e8bff91 100644
--- a/python/paddle/fluid/tests/unittests/test_fake_quantize_op.py
+++ b/python/paddle/fluid/tests/unittests/test_fake_quantize_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestFakeQuantizeOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_fc_mkldnn_op.py b/python/paddle/fluid/tests/unittests/test_fc_mkldnn_op.py
index 1476061a12ed2361b514740a16d75fd9d3cc8e63..3f547f3c484bf034a87823a75d946ef130a5cb70 100644
--- a/python/paddle/fluid/tests/unittests/test_fc_mkldnn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_fc_mkldnn_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def fully_connected_naive(input, weights, bias_data=None):
diff --git a/python/paddle/fluid/tests/unittests/test_fetch_var.py b/python/paddle/fluid/tests/unittests/test_fetch_var.py
index 80994ef4ab48273fcdfc7cec209519f72d9a1456..46c3bbb6712c6276e48dd9328d7741a447f28b91 100644
--- a/python/paddle/fluid/tests/unittests/test_fetch_var.py
+++ b/python/paddle/fluid/tests/unittests/test_fetch_var.py
@@ -14,7 +14,7 @@
 
 import paddle.fluid as fluid
 import paddle.fluid.layers as layers
-from . import op_test
+import op_test
 import numpy
 import unittest
 
diff --git a/python/paddle/fluid/tests/unittests/test_fill_constant_batch_size_like_op.py b/python/paddle/fluid/tests/unittests/test_fill_constant_batch_size_like_op.py
index 7533db80cb256d54b482eeb1fb24cb98a7e6e90e..0c75cf33f5f208d11081a6802910c25553b8c4ec 100644
--- a/python/paddle/fluid/tests/unittests/test_fill_constant_batch_size_like_op.py
+++ b/python/paddle/fluid/tests/unittests/test_fill_constant_batch_size_like_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestFillConstantBatchSizeLikeWhenFirstDimIsBatchSize(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_fill_constant_op.py b/python/paddle/fluid/tests/unittests/test_fill_constant_op.py
index d94a25b49c02a6e5e02ecbafde9fea3165ae53a7..5e2ddb218af8fcf4f686260296b57519ec7486b9 100644
--- a/python/paddle/fluid/tests/unittests/test_fill_constant_op.py
+++ b/python/paddle/fluid/tests/unittests/test_fill_constant_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestFillConstantOp1(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_fill_op.py b/python/paddle/fluid/tests/unittests/test_fill_op.py
index 09b949871bfa6e65e15b509ef0ebbf150395f574..762d29199e2127415ed7daabca63edcdbae3344f 100644
--- a/python/paddle/fluid/tests/unittests/test_fill_op.py
+++ b/python/paddle/fluid/tests/unittests/test_fill_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 import paddle.fluid.core as core
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_fill_zeros_like_op.py b/python/paddle/fluid/tests/unittests/test_fill_zeros_like_op.py
index 23ab9dd18bd054f443247f5696f6af8a77bf6728..c9b3e4ba138f425fd2991bf637d2e32be3eb5168 100644
--- a/python/paddle/fluid/tests/unittests/test_fill_zeros_like_op.py
+++ b/python/paddle/fluid/tests/unittests/test_fill_zeros_like_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestFillZerosLikeOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_ftrl_op.py b/python/paddle/fluid/tests/unittests/test_ftrl_op.py
index 1b593be37de5e458db443329b2b9d74696b72f55..5f7581391afb2bd57cb25695f3c0d4db8573c80c 100644
--- a/python/paddle/fluid/tests/unittests/test_ftrl_op.py
+++ b/python/paddle/fluid/tests/unittests/test_ftrl_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestFTRLOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_gather_op.py b/python/paddle/fluid/tests/unittests/test_gather_op.py
index df782c990937ca9a33afe8b94556e38bbd31d439..4ae90864806204197c52bbbdc5516f141afd4613 100644
--- a/python/paddle/fluid/tests/unittests/test_gather_op.py
+++ b/python/paddle/fluid/tests/unittests/test_gather_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestGatherOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_gaussian_random_batch_size_like_op.py b/python/paddle/fluid/tests/unittests/test_gaussian_random_batch_size_like_op.py
index fed7989495de659fc8e9b02336c0b266d0885b4f..1398166a74e714e0e902532166cde5d94ccae5f6 100644
--- a/python/paddle/fluid/tests/unittests/test_gaussian_random_batch_size_like_op.py
+++ b/python/paddle/fluid/tests/unittests/test_gaussian_random_batch_size_like_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestGaussianRandomBatchSizeLike(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_gaussian_random_mkldnn_op.py b/python/paddle/fluid/tests/unittests/test_gaussian_random_mkldnn_op.py
index e14c5d668a167ae927be9281ef1ba9f10df3facc..3ae877a60818744f852d3af9a02ffebf5e2affc8 100644
--- a/python/paddle/fluid/tests/unittests/test_gaussian_random_mkldnn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_gaussian_random_mkldnn_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 
-from .test_gaussian_random_op import TestGaussianRandomOp
+from test_gaussian_random_op import TestGaussianRandomOp
 
 
 class TestMKLDNN(TestGaussianRandomOp):
diff --git a/python/paddle/fluid/tests/unittests/test_get_places_op.py b/python/paddle/fluid/tests/unittests/test_get_places_op.py
index 06b088bac0d44b9ac2201b5dd22f089dc5eef00d..964423e2d2638224244b4ca774d8eee08f3ec989 100644
--- a/python/paddle/fluid/tests/unittests/test_get_places_op.py
+++ b/python/paddle/fluid/tests/unittests/test_get_places_op.py
@@ -14,7 +14,7 @@
 
 import paddle.fluid as fluid
 from paddle.fluid.layers.device import get_places
-from . import decorators
+import decorators
 import unittest
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_gru_op.py b/python/paddle/fluid/tests/unittests/test_gru_op.py
index 2f93b0dc2cf23f97671c1d5d70756e0989a26107..86a2c674d01f45b2b141572c8191d2fba7fa312f 100644
--- a/python/paddle/fluid/tests/unittests/test_gru_op.py
+++ b/python/paddle/fluid/tests/unittests/test_gru_op.py
@@ -15,8 +15,8 @@
 import unittest
 import numpy as np
 import math
-from .op_test import OpTest
-from .test_lstm_op import identity, sigmoid, tanh, relu
+from op_test import OpTest
+from test_lstm_op import identity, sigmoid, tanh, relu
 
 
 class TestGRUOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_gru_unit_op.py b/python/paddle/fluid/tests/unittests/test_gru_unit_op.py
index 68359f6f5141bfdff08fecc37ec242bf67afb6b3..87a9eba4d97459082cdf1499efeddf24ed51e1b1 100644
--- a/python/paddle/fluid/tests/unittests/test_gru_unit_op.py
+++ b/python/paddle/fluid/tests/unittests/test_gru_unit_op.py
@@ -15,7 +15,7 @@
 import math
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class GRUActivationType(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_hinge_loss_op.py b/python/paddle/fluid/tests/unittests/test_hinge_loss_op.py
index 6d8aba98ea176571eb83712e658a29e8526f567d..70586c6be3da415fbccf4114615e6f7e08de0f0f 100644
--- a/python/paddle/fluid/tests/unittests/test_hinge_loss_op.py
+++ b/python/paddle/fluid/tests/unittests/test_hinge_loss_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestHingeLossOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_hsigmoid_op.py b/python/paddle/fluid/tests/unittests/test_hsigmoid_op.py
index 9abe44db7dea87e039d6cd46fbe3bfb8779cbef1..d090960c84e47da68a0ebea4609dfc3ed76e114e 100644
--- a/python/paddle/fluid/tests/unittests/test_hsigmoid_op.py
+++ b/python/paddle/fluid/tests/unittests/test_hsigmoid_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import math
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def find_latest_set(num):
diff --git a/python/paddle/fluid/tests/unittests/test_huber_loss_op.py b/python/paddle/fluid/tests/unittests/test_huber_loss_op.py
index ed19c39e04d172e7b5be4e1bf78fd97113d6b588..a8d0a77625598e9d929a993db46ba95b0e07527a 100644
--- a/python/paddle/fluid/tests/unittests/test_huber_loss_op.py
+++ b/python/paddle/fluid/tests/unittests/test_huber_loss_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def huber_loss_forward(val, delta):
diff --git a/python/paddle/fluid/tests/unittests/test_im2sequence_op.py b/python/paddle/fluid/tests/unittests/test_im2sequence_op.py
index 4f5954f59c61233e6288678449acc859be91325b..13bc5768740ece00bbe285a0b47d82bb8a42d2c7 100644
--- a/python/paddle/fluid/tests/unittests/test_im2sequence_op.py
+++ b/python/paddle/fluid/tests/unittests/test_im2sequence_op.py
@@ -13,7 +13,7 @@
 #limitations under the License.
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def get_output_shape(attrs, in_shape, img_real_size):
diff --git a/python/paddle/fluid/tests/unittests/test_iou_similarity_op.py b/python/paddle/fluid/tests/unittests/test_iou_similarity_op.py
index 53d31d20d09c2cb16a2caeaf616de7c087347281..eff4212d91e609a7ef531280bbd3cf3671a59830 100644
--- a/python/paddle/fluid/tests/unittests/test_iou_similarity_op.py
+++ b/python/paddle/fluid/tests/unittests/test_iou_similarity_op.py
@@ -17,7 +17,7 @@ import numpy as np
 import numpy.random as random
 import sys
 import math
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestIOUSimilarityOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_is_empty_op.py b/python/paddle/fluid/tests/unittests/test_is_empty_op.py
index 33777dfecbceac84faa2d63ed1f246d89396f29a..11121d9b65351eab639b7618fac0e54714cf4680 100644
--- a/python/paddle/fluid/tests/unittests/test_is_empty_op.py
+++ b/python/paddle/fluid/tests/unittests/test_is_empty_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestEmpty(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_l1_norm_op.py b/python/paddle/fluid/tests/unittests/test_l1_norm_op.py
index f5e139fcfd8d1fb408762f9144cf5359e3b7ac90..fa5b18a16f7a3e734ff8bb4f53240e8a9ce8fd8f 100644
--- a/python/paddle/fluid/tests/unittests/test_l1_norm_op.py
+++ b/python/paddle/fluid/tests/unittests/test_l1_norm_op.py
@@ -14,7 +14,7 @@
 
 import numpy as np
 import unittest
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestL1NormOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_label_smooth_op.py b/python/paddle/fluid/tests/unittests/test_label_smooth_op.py
index 081852b6f1adcd521d887b767fdc61027cc4e2b4..ca21289a0d48a123aed90bc557ccc732702b47f1 100644
--- a/python/paddle/fluid/tests/unittests/test_label_smooth_op.py
+++ b/python/paddle/fluid/tests/unittests/test_label_smooth_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestLabelSmoothOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_layers.py b/python/paddle/fluid/tests/unittests/test_layers.py
index 2d33c8cfaa77a931e3dfa25bdcb55e011ebfd38a..bbddf1a0a4057aa5a0822659f328745f4f0c58f7 100644
--- a/python/paddle/fluid/tests/unittests/test_layers.py
+++ b/python/paddle/fluid/tests/unittests/test_layers.py
@@ -20,7 +20,7 @@ from paddle.fluid.layers.device import get_places
 import paddle.fluid.nets as nets
 from paddle.fluid.framework import Program, program_guard, default_main_program
 from paddle.fluid.param_attr import ParamAttr
-from . import decorators
+import decorators
 
 
 class TestBook(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_linear_chain_crf_op.py b/python/paddle/fluid/tests/unittests/test_linear_chain_crf_op.py
index 0d0286e104c8cfc74a3eedbb710d11a8b27a8444..696d0ab4fa81a409a2bf0d6f6f23779ec26eb6d2 100644
--- a/python/paddle/fluid/tests/unittests/test_linear_chain_crf_op.py
+++ b/python/paddle/fluid/tests/unittests/test_linear_chain_crf_op.py
@@ -16,7 +16,7 @@ import unittest
 import random
 import numpy as np
 
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class LinearChainCrfForward(object):
diff --git a/python/paddle/fluid/tests/unittests/test_listen_and_serv_op.py b/python/paddle/fluid/tests/unittests/test_listen_and_serv_op.py
index 9f24acb569b26ad60f0d466155e782d85f6b1983..1cdc69501043d120b9e3cc8ccda3a1212d205886 100644
--- a/python/paddle/fluid/tests/unittests/test_listen_and_serv_op.py
+++ b/python/paddle/fluid/tests/unittests/test_listen_and_serv_op.py
@@ -20,7 +20,7 @@ import subprocess
 import time
 import unittest
 from multiprocessing import Process
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def run_pserver(use_cuda, sync_mode, ip, port, trainers, trainer_id):
diff --git a/python/paddle/fluid/tests/unittests/test_lod_reset_op.py b/python/paddle/fluid/tests/unittests/test_lod_reset_op.py
index 3ca440e1c4d0d67c5d33a34e5849a09c24910038..77905c4b96499c855fd5c5e704b8051ccdb7a323 100644
--- a/python/paddle/fluid/tests/unittests/test_lod_reset_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lod_reset_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestLodResetOpByAttr(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_log_loss_op.py b/python/paddle/fluid/tests/unittests/test_log_loss_op.py
index 033442bcfb0f6e767f317e16f489567ac877ada2..d3980b8db93ca517d16b6f782ba800ce839c3f45 100644
--- a/python/paddle/fluid/tests/unittests/test_log_loss_op.py
+++ b/python/paddle/fluid/tests/unittests/test_log_loss_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestLogLossOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_logical_op.py b/python/paddle/fluid/tests/unittests/test_logical_op.py
index 6bf93b1a38baa65cdf530ba78cd2776ee45ea597..1d7dfe60f200459705a48664c1a5b22d2a5888d2 100644
--- a/python/paddle/fluid/tests/unittests/test_logical_op.py
+++ b/python/paddle/fluid/tests/unittests/test_logical_op.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from . import op_test
+import op_test
 import unittest
 import numpy as np
 
diff --git a/python/paddle/fluid/tests/unittests/test_lookup_sparse_table_op.py b/python/paddle/fluid/tests/unittests/test_lookup_sparse_table_op.py
index bf3e7420aec11b887f0bc194f5c4d58a04e02c69..aa9eae1e882f55ef51f38e158317a1a9aeed641c 100644
--- a/python/paddle/fluid/tests/unittests/test_lookup_sparse_table_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lookup_sparse_table_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 import paddle.fluid.core as core
 from paddle.fluid.op import Operator
 
diff --git a/python/paddle/fluid/tests/unittests/test_lookup_table_op.py b/python/paddle/fluid/tests/unittests/test_lookup_table_op.py
index bb69e3a9afc6603a795c2930f1d4214ca24e03f4..487a7b74357ec2730f8300d4b0635280406fe9bb 100644
--- a/python/paddle/fluid/tests/unittests/test_lookup_table_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lookup_table_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 import paddle.fluid.core as core
 from paddle.fluid.op import Operator
 
diff --git a/python/paddle/fluid/tests/unittests/test_lrn_mkldnn_op.py b/python/paddle/fluid/tests/unittests/test_lrn_mkldnn_op.py
index b82e438f121d460bbf0fa509e019108e6445290f..966a16dc870c041b9deb140bed57d907cf305fd8 100644
--- a/python/paddle/fluid/tests/unittests/test_lrn_mkldnn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lrn_mkldnn_op.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import unittest
-from .test_lrn_op import TestLRNOp
+from test_lrn_op import TestLRNOp
 
 
 class TestLRNMKLDNNOp(TestLRNOp):
diff --git a/python/paddle/fluid/tests/unittests/test_lrn_op.py b/python/paddle/fluid/tests/unittests/test_lrn_op.py
index a7539e43ecc54a11af78f1fb0172a57a000336d3..eaff45cbb2a58798e9d55149510bec72eea370cd 100644
--- a/python/paddle/fluid/tests/unittests/test_lrn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lrn_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestLRNOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_lstm_op.py b/python/paddle/fluid/tests/unittests/test_lstm_op.py
index 421e1cb8aa842d4e8daed166507a90d210ddcb4b..705a24bd8f39a55e0a352944d961f8d33aaf96ff 100644
--- a/python/paddle/fluid/tests/unittests/test_lstm_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lstm_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 SIGMOID_THRESHOLD_MIN = -40.0
 SIGMOID_THRESHOLD_MAX = 13.0
diff --git a/python/paddle/fluid/tests/unittests/test_lstm_unit_op.py b/python/paddle/fluid/tests/unittests/test_lstm_unit_op.py
index fd3e2f24ae89e79325f65b6393c8f9334808db6e..e343265874f99afcd8201fa997932e2613fffc4c 100644
--- a/python/paddle/fluid/tests/unittests/test_lstm_unit_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lstm_unit_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def sigmoid_np(x):
diff --git a/python/paddle/fluid/tests/unittests/test_lstmp_op.py b/python/paddle/fluid/tests/unittests/test_lstmp_op.py
index 0527b9ac6a37c62ac43d8ff89892392461a57bf7..ed2262da4bc727657c2e65d69cb1922891e17b09 100644
--- a/python/paddle/fluid/tests/unittests/test_lstmp_op.py
+++ b/python/paddle/fluid/tests/unittests/test_lstmp_op.py
@@ -13,7 +13,7 @@
 #limitations under the License.
 import unittest
 import numpy as np
-from . import test_lstm_op as LstmTest
+import test_lstm_op as LstmTest
 
 ACTIVATION = {
     'identity': LstmTest.identity,
diff --git a/python/paddle/fluid/tests/unittests/test_margin_rank_loss_op.py b/python/paddle/fluid/tests/unittests/test_margin_rank_loss_op.py
index d4e2cee088882ba9c4d53f0ac81c785d19613469..97c112487fd9193ab77d18945585a554e5fbcdf8 100644
--- a/python/paddle/fluid/tests/unittests/test_margin_rank_loss_op.py
+++ b/python/paddle/fluid/tests/unittests/test_margin_rank_loss_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestMarginRankLossOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_math_op_patch.py b/python/paddle/fluid/tests/unittests/test_math_op_patch.py
index 73419cedc4bed509322921ebbf4ad7ada35c4e5a..852a80261e02f5ed19e7fbe608d490be1f7798a9 100644
--- a/python/paddle/fluid/tests/unittests/test_math_op_patch.py
+++ b/python/paddle/fluid/tests/unittests/test_math_op_patch.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import unittest
-from . import decorators
+import decorators
 import paddle.fluid as fluid
 import numpy
 
diff --git a/python/paddle/fluid/tests/unittests/test_matmul_op.py b/python/paddle/fluid/tests/unittests/test_matmul_op.py
index 6d7c015ce4e272d5ec29b07be4d1cbff59729547..cae2c8fa87d9857de8f26cf4962d9370eca66243 100644
--- a/python/paddle/fluid/tests/unittests/test_matmul_op.py
+++ b/python/paddle/fluid/tests/unittests/test_matmul_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def generate_compatible_shapes(dim_X, dim_Y, transpose_X, transpose_Y):
diff --git a/python/paddle/fluid/tests/unittests/test_maxout_op.py b/python/paddle/fluid/tests/unittests/test_maxout_op.py
index 1bea7e58d3d47b909e34af70f09873ba04ed40cb..f5ddf72516bf8adb41698d9b2e22c7de74a3fad9 100644
--- a/python/paddle/fluid/tests/unittests/test_maxout_op.py
+++ b/python/paddle/fluid/tests/unittests/test_maxout_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def maxout_forward_naive(input, groups):
diff --git a/python/paddle/fluid/tests/unittests/test_mean_iou.py b/python/paddle/fluid/tests/unittests/test_mean_iou.py
index 986bfa1d35b9d1fc8776d05b2d793390b164bf19..32b4ee184787cd4cda0fd889f67a609141a3cb27 100644
--- a/python/paddle/fluid/tests/unittests/test_mean_iou.py
+++ b/python/paddle/fluid/tests/unittests/test_mean_iou.py
@@ -15,7 +15,7 @@
 from __future__ import division
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def compute_mean_iou(predictions, labels, num_classes, in_wrongs, in_corrects,
diff --git a/python/paddle/fluid/tests/unittests/test_mean_op.py b/python/paddle/fluid/tests/unittests/test_mean_op.py
index 9fa1b993a322e2dc8c9735fd996175b18defb745..15472a8fc4716f218b0eddf17589634c565130b1 100644
--- a/python/paddle/fluid/tests/unittests/test_mean_op.py
+++ b/python/paddle/fluid/tests/unittests/test_mean_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestMeanOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_merge_ids_op.py b/python/paddle/fluid/tests/unittests/test_merge_ids_op.py
index 56c4872ad42b1323ab7f68b9dee39198a8c18ae4..f209bdf30faffc0b2c7932b7b10f384d6d61a831 100644
--- a/python/paddle/fluid/tests/unittests/test_merge_ids_op.py
+++ b/python/paddle/fluid/tests/unittests/test_merge_ids_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestMergeIdsOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_mine_hard_examples_op.py b/python/paddle/fluid/tests/unittests/test_mine_hard_examples_op.py
index ba4959598416258dd60b9a742b8047ab0d2088b9..54ee85c1a7a539fe9517f32adb35ab99b5ae2a07 100644
--- a/python/paddle/fluid/tests/unittests/test_mine_hard_examples_op.py
+++ b/python/paddle/fluid/tests/unittests/test_mine_hard_examples_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 import sys
 import math
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestMineHardExamplesOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_minus_op.py b/python/paddle/fluid/tests/unittests/test_minus_op.py
index d238b8102b4da3acaa9910c9ca6b85f3cee6829e..ee32bd49925e266cfd5beb51496355e111a3d0d2 100644
--- a/python/paddle/fluid/tests/unittests/test_minus_op.py
+++ b/python/paddle/fluid/tests/unittests/test_minus_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestMinusOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_modified_huber_loss_op.py b/python/paddle/fluid/tests/unittests/test_modified_huber_loss_op.py
index df4fc8ce92eb88f2ed691eaf89913eeacbfc61d3..62035efe8ec3809a7672e58697de4304426338d7 100644
--- a/python/paddle/fluid/tests/unittests/test_modified_huber_loss_op.py
+++ b/python/paddle/fluid/tests/unittests/test_modified_huber_loss_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def modified_huber_loss_forward(val):
diff --git a/python/paddle/fluid/tests/unittests/test_momentum_op.py b/python/paddle/fluid/tests/unittests/test_momentum_op.py
index 1a3d655ab9bb244e9d59abf51a0bff25fbfde597..c75d3bd276a5b494090c1aa1fea0bb4f2c067173 100644
--- a/python/paddle/fluid/tests/unittests/test_momentum_op.py
+++ b/python/paddle/fluid/tests/unittests/test_momentum_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestMomentumOp1(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_mul_op.py b/python/paddle/fluid/tests/unittests/test_mul_op.py
index ccec6060a8f7e984f58abbe2f0eba3f0353cc108..bbc782c1bce302df68ab30013f3a7667e51ed479 100644
--- a/python/paddle/fluid/tests/unittests/test_mul_op.py
+++ b/python/paddle/fluid/tests/unittests/test_mul_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestMulOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_multiclass_nms_op.py b/python/paddle/fluid/tests/unittests/test_multiclass_nms_op.py
index 2a645e42b0e2c82adb693172c5718a7818134ba5..10cb78a08db0471699bcc0b7323d5346e3af64c7 100644
--- a/python/paddle/fluid/tests/unittests/test_multiclass_nms_op.py
+++ b/python/paddle/fluid/tests/unittests/test_multiclass_nms_op.py
@@ -14,7 +14,7 @@
 import unittest
 import numpy as np
 import copy
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def iou(box_a, box_b):
diff --git a/python/paddle/fluid/tests/unittests/test_multiplex_op.py b/python/paddle/fluid/tests/unittests/test_multiplex_op.py
index 7e8717ebd51c43662fcf955a52f1fa1556d80703..03cad8b43bac053f246156b8c57df9fceab20dcd 100644
--- a/python/paddle/fluid/tests/unittests/test_multiplex_op.py
+++ b/python/paddle/fluid/tests/unittests/test_multiplex_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestMultiplexOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_nce.py b/python/paddle/fluid/tests/unittests/test_nce.py
index 5aa08fafcdf33b7c638b05e16e5b346130a6305e..7431a142c53a64e58872390776904ce8f781d6a9 100644
--- a/python/paddle/fluid/tests/unittests/test_nce.py
+++ b/python/paddle/fluid/tests/unittests/test_nce.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def nce(input, weight, bias, sample_weight, labels, num_classes,
diff --git a/python/paddle/fluid/tests/unittests/test_norm_op.py b/python/paddle/fluid/tests/unittests/test_norm_op.py
index 84ef777b760ea0574ddbff309c65f3d8636ed716..108a665f37f5cd652ec83f784a56ca52e6b49fe8 100644
--- a/python/paddle/fluid/tests/unittests/test_norm_op.py
+++ b/python/paddle/fluid/tests/unittests/test_norm_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def l2_norm(x, axis, epsilon):
diff --git a/python/paddle/fluid/tests/unittests/test_one_hot_op.py b/python/paddle/fluid/tests/unittests/test_one_hot_op.py
index ab63ba226ab3b303c16963d5db39c2e631139d16..06fccd39ac65ab62ee5618ac19d1a0535b481d06 100644
--- a/python/paddle/fluid/tests/unittests/test_one_hot_op.py
+++ b/python/paddle/fluid/tests/unittests/test_one_hot_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import math
-from .op_test import OpTest
+from op_test import OpTest
 import paddle.fluid as fluid
 import paddle.fluid.core as core
 import paddle.fluid.framework as framework
diff --git a/python/paddle/fluid/tests/unittests/test_pad_op.py b/python/paddle/fluid/tests/unittests/test_pad_op.py
index deb7637f2b8a4b109eda4c7f5d3473473bc076e0..300f3ffcb8d1a6152b1e03f1356582c02bc4b2a3 100644
--- a/python/paddle/fluid/tests/unittests/test_pad_op.py
+++ b/python/paddle/fluid/tests/unittests/test_pad_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestPadOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_parallel_executor_mnist.py b/python/paddle/fluid/tests/unittests/test_parallel_executor_mnist.py
index dfbf9eea510838f503538d55d5a834f2fbecc5ef..95fbe6b016001d2c05956190f82ca656b9d1b451 100644
--- a/python/paddle/fluid/tests/unittests/test_parallel_executor_mnist.py
+++ b/python/paddle/fluid/tests/unittests/test_parallel_executor_mnist.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from .parallel_executor_test_base import TestParallelExecutorBase
+from parallel_executor_test_base import TestParallelExecutorBase
 import paddle.fluid as fluid
 import paddle.fluid.core as core
 import numpy as np
diff --git a/python/paddle/fluid/tests/unittests/test_parallel_executor_seresnext.py b/python/paddle/fluid/tests/unittests/test_parallel_executor_seresnext.py
index cabfecf62e81b722610f98be8071e8cfc601368a..b04c24b9bd65fcb9fa5d3eaee90db38f3e19303f 100644
--- a/python/paddle/fluid/tests/unittests/test_parallel_executor_seresnext.py
+++ b/python/paddle/fluid/tests/unittests/test_parallel_executor_seresnext.py
@@ -17,7 +17,7 @@ import paddle.fluid.layers.ops as ops
 from paddle.fluid.initializer import init_on_cpu
 from paddle.fluid.layers.learning_rate_scheduler import _decay_step_counter
 import paddle.fluid.core as core
-from .parallel_executor_test_base import TestParallelExecutorBase
+from parallel_executor_test_base import TestParallelExecutorBase
 import unittest
 import math
 import os
diff --git a/python/paddle/fluid/tests/unittests/test_parallel_executor_transformer.py b/python/paddle/fluid/tests/unittests/test_parallel_executor_transformer.py
index 7717de0218dd2dcce7ba21994113f3a134477fa3..b6215fddb11bb6b3a76b5a6395e7254d21971c13 100644
--- a/python/paddle/fluid/tests/unittests/test_parallel_executor_transformer.py
+++ b/python/paddle/fluid/tests/unittests/test_parallel_executor_transformer.py
@@ -13,9 +13,9 @@
 # limitations under the License.
 
 import paddle.fluid as fluid
-from . import transformer_model
+import transformer_model
 import numpy as np
-from .parallel_executor_test_base import TestParallelExecutorBase
+from parallel_executor_test_base import TestParallelExecutorBase
 import unittest
 import paddle
 import paddle.dataset.wmt16 as wmt16
diff --git a/python/paddle/fluid/tests/unittests/test_polygon_box_transform.py b/python/paddle/fluid/tests/unittests/test_polygon_box_transform.py
index d6e75e4a834974b08f28ddf35d15a2b10f1205c8..8aff4e87f67bc61a162f09e982cf0a7a61639257 100644
--- a/python/paddle/fluid/tests/unittests/test_polygon_box_transform.py
+++ b/python/paddle/fluid/tests/unittests/test_polygon_box_transform.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def PolygonBoxRestore(input):
diff --git a/python/paddle/fluid/tests/unittests/test_pool2d_mkldnn_op.py b/python/paddle/fluid/tests/unittests/test_pool2d_mkldnn_op.py
index eba4bc310a440949f44e5d3e93f23ecc0d0b52cb..003ebba18b26198427d9f313596ae85656ac24fa 100644
--- a/python/paddle/fluid/tests/unittests/test_pool2d_mkldnn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_pool2d_mkldnn_op.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import unittest
-from .test_pool2d_op import TestPool2d_Op, TestCase1, TestCase2, TestCase3, TestCase4, TestCase5
+from test_pool2d_op import TestPool2d_Op, TestCase1, TestCase2, TestCase3, TestCase4, TestCase5
 
 
 class TestMKLDNNCase1(TestPool2d_Op):
diff --git a/python/paddle/fluid/tests/unittests/test_pool2d_op.py b/python/paddle/fluid/tests/unittests/test_pool2d_op.py
index b66fb7201ba60290665eac978ebe00e07ed0599c..1cf70311b40bc7648b7462e93f201aa33c77b137 100644
--- a/python/paddle/fluid/tests/unittests/test_pool2d_op.py
+++ b/python/paddle/fluid/tests/unittests/test_pool2d_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def max_pool2D_forward_naive(x,
diff --git a/python/paddle/fluid/tests/unittests/test_pool3d_op.py b/python/paddle/fluid/tests/unittests/test_pool3d_op.py
index 326da90eeed1e0fab34a333a11615aaa0125e378..92c64b37921eafd4c90e247a235f2dacea8fea1e 100644
--- a/python/paddle/fluid/tests/unittests/test_pool3d_op.py
+++ b/python/paddle/fluid/tests/unittests/test_pool3d_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def max_pool3D_forward_naive(x,
diff --git a/python/paddle/fluid/tests/unittests/test_pool_max_op.py b/python/paddle/fluid/tests/unittests/test_pool_max_op.py
index 486c6eb24ad2f269630e6e19c1fe72482cd72c81..e6a9f6f08cf1445c14494506641b0c3502591c37 100644
--- a/python/paddle/fluid/tests/unittests/test_pool_max_op.py
+++ b/python/paddle/fluid/tests/unittests/test_pool_max_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def max_pool3D_forward_naive(x, ksize, strides, paddings, global_pool=False):
diff --git a/python/paddle/fluid/tests/unittests/test_positive_negative_pair_op.py b/python/paddle/fluid/tests/unittests/test_positive_negative_pair_op.py
index 0ce32390de146828f67b4c7c5f4a5009b0322869..8c76393bdaccc0b701b409efebf08fac95aa5f1a 100644
--- a/python/paddle/fluid/tests/unittests/test_positive_negative_pair_op.py
+++ b/python/paddle/fluid/tests/unittests/test_positive_negative_pair_op.py
@@ -15,7 +15,7 @@
 import unittest
 import itertools
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def py_pnpair_op(score, label, query, column=-1, weight=None):
diff --git a/python/paddle/fluid/tests/unittests/test_precision_recall_op.py b/python/paddle/fluid/tests/unittests/test_precision_recall_op.py
index 3fb231f1077add952a894081f9edb03e32df750d..5ae425fee18b9b1baa0b945782268b79d6bb6625 100644
--- a/python/paddle/fluid/tests/unittests/test_precision_recall_op.py
+++ b/python/paddle/fluid/tests/unittests/test_precision_recall_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def calc_precision(tp_count, fp_count):
diff --git a/python/paddle/fluid/tests/unittests/test_prelu_op.py b/python/paddle/fluid/tests/unittests/test_prelu_op.py
index 1c7e32ee6f5b665e0d64f1b9fee72d94a957fc7e..ae19a553bb826002c562c15ee07759391d51b4d8 100644
--- a/python/paddle/fluid/tests/unittests/test_prelu_op.py
+++ b/python/paddle/fluid/tests/unittests/test_prelu_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class PReluTest(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_prior_box_op.py b/python/paddle/fluid/tests/unittests/test_prior_box_op.py
index 28400b26b1182c60bb5d0bf6cf41f33117d69f36..e15554737b9f3fa36382dde15ded928271679538 100644
--- a/python/paddle/fluid/tests/unittests/test_prior_box_op.py
+++ b/python/paddle/fluid/tests/unittests/test_prior_box_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 import sys
 import math
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestPriorBoxOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_proximal_adagrad_op.py b/python/paddle/fluid/tests/unittests/test_proximal_adagrad_op.py
index ddeb2cd6de26c0baa14bd4c878011aa0dfa07718..3c2689585061af5a11a247a01b87b432dcd86e13 100644
--- a/python/paddle/fluid/tests/unittests/test_proximal_adagrad_op.py
+++ b/python/paddle/fluid/tests/unittests/test_proximal_adagrad_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestProximalAdagradOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_proximal_gd_op.py b/python/paddle/fluid/tests/unittests/test_proximal_gd_op.py
index 53ad2a921f06e57db9d225903359edbf9cc27720..137594b9a08e13bf6c3f3779356c209596f9ba8e 100644
--- a/python/paddle/fluid/tests/unittests/test_proximal_gd_op.py
+++ b/python/paddle/fluid/tests/unittests/test_proximal_gd_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestProximalGDOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_random_crop_op.py b/python/paddle/fluid/tests/unittests/test_random_crop_op.py
index 396edbba9f30c52f2c30eb48bde8cf622c20b7e6..1c708d0386da4028f1f3d177d0a3fd494c077c6e 100644
--- a/python/paddle/fluid/tests/unittests/test_random_crop_op.py
+++ b/python/paddle/fluid/tests/unittests/test_random_crop_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestRandomCropOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_rank_loss_op.py b/python/paddle/fluid/tests/unittests/test_rank_loss_op.py
index 4e5673e84f82fec4e3ca698ae1b58bc5a588c275..7eba1e2077e25325d537f01f043ed1afa372800c 100644
--- a/python/paddle/fluid/tests/unittests/test_rank_loss_op.py
+++ b/python/paddle/fluid/tests/unittests/test_rank_loss_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestRankLossOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_reduce_op.py b/python/paddle/fluid/tests/unittests/test_reduce_op.py
index 1d3cc2f88bdf927b58deada2e16e13645409d11f..06d116601bf733986ccf9c725340456ab1258be2 100644
--- a/python/paddle/fluid/tests/unittests/test_reduce_op.py
+++ b/python/paddle/fluid/tests/unittests/test_reduce_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSumOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_registry.py b/python/paddle/fluid/tests/unittests/test_registry.py
index 8ad7908b1fc6d28a7c93ee778d68791253e089d8..a361c4624e3e2efa817e8137ff31133997a0a1fb 100644
--- a/python/paddle/fluid/tests/unittests/test_registry.py
+++ b/python/paddle/fluid/tests/unittests/test_registry.py
@@ -15,7 +15,7 @@ import unittest
 
 import paddle.fluid as fluid
 import numpy as np
-from . import decorators
+import decorators
 
 
 class TestRegistry(unittest.TestCase):
diff --git a/python/paddle/fluid/tests/unittests/test_reshape_op.py b/python/paddle/fluid/tests/unittests/test_reshape_op.py
index 43d1eab06841ae67287c40048e293642b55fad52..f51b5a7e9907294a5b91c920a363830d8b9a7137 100644
--- a/python/paddle/fluid/tests/unittests/test_reshape_op.py
+++ b/python/paddle/fluid/tests/unittests/test_reshape_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestReshapeOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_reverse_op.py b/python/paddle/fluid/tests/unittests/test_reverse_op.py
index e0366717b378349c11a92a4c7413bcac6e168f26..f845575a02869f08299d76b5600074598ca27f6c 100644
--- a/python/paddle/fluid/tests/unittests/test_reverse_op.py
+++ b/python/paddle/fluid/tests/unittests/test_reverse_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestReverseOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_rmsprop_op.py b/python/paddle/fluid/tests/unittests/test_rmsprop_op.py
index 4c146f9d4b6964987a2188370f4d9c61bbad1002..0d84a5853ead45b84de9383dd8749992d2f91440 100644
--- a/python/paddle/fluid/tests/unittests/test_rmsprop_op.py
+++ b/python/paddle/fluid/tests/unittests/test_rmsprop_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestRmspropOp1(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_roi_pool_op.py b/python/paddle/fluid/tests/unittests/test_roi_pool_op.py
index 9e4554a8a4c959b3ddd2a456593a169f4550c1a8..df5684ab173a4889dd7b693f9246bafd12e0345f 100644
--- a/python/paddle/fluid/tests/unittests/test_roi_pool_op.py
+++ b/python/paddle/fluid/tests/unittests/test_roi_pool_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 import math
 import sys
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestROIPoolOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_row_conv_op.py b/python/paddle/fluid/tests/unittests/test_row_conv_op.py
index 66262340a220327a7eee0face44b664a73764bf9..07dcd108689ae6069e30fe22029258d192215549 100644
--- a/python/paddle/fluid/tests/unittests/test_row_conv_op.py
+++ b/python/paddle/fluid/tests/unittests/test_row_conv_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def row_conv_forward(x, lod, wt):
diff --git a/python/paddle/fluid/tests/unittests/test_rpn_target_assign_op.py b/python/paddle/fluid/tests/unittests/test_rpn_target_assign_op.py
index bb9f1a2f3664462e14322d8660a87de3452b313d..df6e0faaca6fd007b39a8f358d964055e149a025 100644
--- a/python/paddle/fluid/tests/unittests/test_rpn_target_assign_op.py
+++ b/python/paddle/fluid/tests/unittests/test_rpn_target_assign_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import paddle.fluid.core as core
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def rpn_target_assign(iou, rpn_batch_size_per_im, rpn_positive_overlap,
diff --git a/python/paddle/fluid/tests/unittests/test_scale_op.py b/python/paddle/fluid/tests/unittests/test_scale_op.py
index 068b96888c1f54d3ae5e52e05ab4a433b2d954ae..53f59c399054a96f5b5f07a390e6fa9eeae878ce 100644
--- a/python/paddle/fluid/tests/unittests/test_scale_op.py
+++ b/python/paddle/fluid/tests/unittests/test_scale_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestScaleOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_scatter_op.py b/python/paddle/fluid/tests/unittests/test_scatter_op.py
index 4ea10950182c169a9305b7161a36c1087617cab2..fb1728743630b3ea908ae835444eff7fd71b72c8 100644
--- a/python/paddle/fluid/tests/unittests/test_scatter_op.py
+++ b/python/paddle/fluid/tests/unittests/test_scatter_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestScatterOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_seq_concat_op.py b/python/paddle/fluid/tests/unittests/test_seq_concat_op.py
index d89447d5fe2ea3720a9ec1ec57942e7c0cb587cd..11ffa761a690eb1f9f6dc50c45128a99301741db 100644
--- a/python/paddle/fluid/tests/unittests/test_seq_concat_op.py
+++ b/python/paddle/fluid/tests/unittests/test_seq_concat_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import sys
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def to_abs_offset_lod(lod):
diff --git a/python/paddle/fluid/tests/unittests/test_seq_conv.py b/python/paddle/fluid/tests/unittests/test_seq_conv.py
index 838f1a5eba1de53ba682b86cf52b12b2ba2a5878..1a6e1aad799e77b8e746353bee93680691939d24 100644
--- a/python/paddle/fluid/tests/unittests/test_seq_conv.py
+++ b/python/paddle/fluid/tests/unittests/test_seq_conv.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import random
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSeqProject(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_seq_pool.py b/python/paddle/fluid/tests/unittests/test_seq_pool.py
index 92e08b92b649975999804f44363daddd55b98ab1..0b3659d7a67956f7546d368346bd102eeedf1d97 100644
--- a/python/paddle/fluid/tests/unittests/test_seq_pool.py
+++ b/python/paddle/fluid/tests/unittests/test_seq_pool.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSeqAvgPool(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_sequence_erase_op.py b/python/paddle/fluid/tests/unittests/test_sequence_erase_op.py
index b567534cc8d1ec6af33300294494c83a6cf9361d..8f0765277ae85af2b17ad96d4fd0c1148c393ff0 100644
--- a/python/paddle/fluid/tests/unittests/test_sequence_erase_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sequence_erase_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def sequence_erase(in_seq, lod0, tokens):
diff --git a/python/paddle/fluid/tests/unittests/test_sequence_expand.py b/python/paddle/fluid/tests/unittests/test_sequence_expand.py
index 51a8392b85a4786cc0f1a8b741c1d5d839361112..5ff0dab23e516ae8114b8264492fb2a9d5c0b3f8 100644
--- a/python/paddle/fluid/tests/unittests/test_sequence_expand.py
+++ b/python/paddle/fluid/tests/unittests/test_sequence_expand.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSequenceExpand(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_sequence_reshape.py b/python/paddle/fluid/tests/unittests/test_sequence_reshape.py
index 6aacd4f83f20777fae3c5b7bf233d7d790f43cf0..39b02ecf6ddb40737c4c1737d652c1a1b744d923 100644
--- a/python/paddle/fluid/tests/unittests/test_sequence_reshape.py
+++ b/python/paddle/fluid/tests/unittests/test_sequence_reshape.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import math
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSequenceReshape(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_sequence_slice_op.py b/python/paddle/fluid/tests/unittests/test_sequence_slice_op.py
index 8204153b532d9c166571ab09359ba2062851c9fe..313e485d1e3080f2c59c68256cbc5c81aa6558cd 100644
--- a/python/paddle/fluid/tests/unittests/test_sequence_slice_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sequence_slice_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import sys
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSequenceSliceOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_sequence_softmax_op.py b/python/paddle/fluid/tests/unittests/test_sequence_softmax_op.py
index 4134a5d407422c6dba33da271aef67cfffd04efd..c4fc8b74cf80c3596b0af9f7f0434864591195bd 100644
--- a/python/paddle/fluid/tests/unittests/test_sequence_softmax_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sequence_softmax_op.py
@@ -14,8 +14,8 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
-from .test_softmax_op import stable_softmax
+from op_test import OpTest
+from test_softmax_op import stable_softmax
 import paddle.fluid.core as core
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_sgd_op.py b/python/paddle/fluid/tests/unittests/test_sgd_op.py
index d3e067e67c9f8da3023bc9f9cf3cfb0bac1c557c..3126293f9d8e52daa866be5fc1533648a33f3363 100644
--- a/python/paddle/fluid/tests/unittests/test_sgd_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sgd_op.py
@@ -16,7 +16,7 @@ import unittest
 import numpy as np
 import paddle.fluid.core as core
 from paddle.fluid.op import Operator
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSGDOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_shape_op.py b/python/paddle/fluid/tests/unittests/test_shape_op.py
index 28677e0a4f7b6f1e448ca77ef67d411b96858d32..a62ee050075cb8c9f8817c142825a89c24bdfedf 100644
--- a/python/paddle/fluid/tests/unittests/test_shape_op.py
+++ b/python/paddle/fluid/tests/unittests/test_shape_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestShapeOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_sigmoid_cross_entropy_with_logits_op.py b/python/paddle/fluid/tests/unittests/test_sigmoid_cross_entropy_with_logits_op.py
index f74529b4d68e979bf7739d2bd9dca81fbd5335d3..c435796569cd2479c19d70a849991f439bf5292a 100644
--- a/python/paddle/fluid/tests/unittests/test_sigmoid_cross_entropy_with_logits_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sigmoid_cross_entropy_with_logits_op.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 from scipy.special import logit
 from scipy.special import expit
 import unittest
diff --git a/python/paddle/fluid/tests/unittests/test_sign_op.py b/python/paddle/fluid/tests/unittests/test_sign_op.py
index 2909c4520ab7b3fb37ff8331e4ad2b79a48eebcb..087a0c575bfa6bc18cb229ad274b4e1e90210605 100644
--- a/python/paddle/fluid/tests/unittests/test_sign_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sign_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSignOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_slice_op.py b/python/paddle/fluid/tests/unittests/test_slice_op.py
index eaf33d9f0de1a790535c291da5989d249bc261b2..1a48bce3bb7c74551a365fd471f6869b128babac 100644
--- a/python/paddle/fluid/tests/unittests/test_slice_op.py
+++ b/python/paddle/fluid/tests/unittests/test_slice_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSliceOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_smooth_l1_loss_op.py b/python/paddle/fluid/tests/unittests/test_smooth_l1_loss_op.py
index 9c53a699410d4f2345414713f82fc3e6481ff19f..e74664dac4d87c5a7e1e061294e93e8267e3cc17 100644
--- a/python/paddle/fluid/tests/unittests/test_smooth_l1_loss_op.py
+++ b/python/paddle/fluid/tests/unittests/test_smooth_l1_loss_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def smooth_l1_loss_forward(val, sigma2):
diff --git a/python/paddle/fluid/tests/unittests/test_softmax_op.py b/python/paddle/fluid/tests/unittests/test_softmax_op.py
index e42f9a705c7cc09758297d00b329a46858d2c74e..0ab581cfb0ea0ff2205450b8e62edb8bf3c51707 100644
--- a/python/paddle/fluid/tests/unittests/test_softmax_op.py
+++ b/python/paddle/fluid/tests/unittests/test_softmax_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 import paddle.fluid.core as core
 
 
diff --git a/python/paddle/fluid/tests/unittests/test_softmax_with_cross_entropy_op.py b/python/paddle/fluid/tests/unittests/test_softmax_with_cross_entropy_op.py
index 97f5c4f8df57c15994daadecf08828c4c73cb8f6..c0d9fc8f22a7c4f791d80a9cad87d003b5d54299 100644
--- a/python/paddle/fluid/tests/unittests/test_softmax_with_cross_entropy_op.py
+++ b/python/paddle/fluid/tests/unittests/test_softmax_with_cross_entropy_op.py
@@ -15,8 +15,8 @@
 import unittest
 import numpy as np
 
-from .op_test import OpTest
-from .test_softmax_op import stable_softmax
+from op_test import OpTest
+from test_softmax_op import stable_softmax
 
 
 class TestSoftmaxWithCrossEntropyOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_split_ids_op.py b/python/paddle/fluid/tests/unittests/test_split_ids_op.py
index fdc9d90cef05b217beb1609500392213664655e4..e9f0a06a56b42952800411d548bb3fc1732e031e 100644
--- a/python/paddle/fluid/tests/unittests/test_split_ids_op.py
+++ b/python/paddle/fluid/tests/unittests/test_split_ids_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSplitIdsOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_split_op.py b/python/paddle/fluid/tests/unittests/test_split_op.py
index 919020a9fbd3516a0e10ed8e0b6f9249dc5e679d..6b67a52e81b978ed78c72629f9177759f8e2c4e1 100644
--- a/python/paddle/fluid/tests/unittests/test_split_op.py
+++ b/python/paddle/fluid/tests/unittests/test_split_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSplitOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_spp_op.py b/python/paddle/fluid/tests/unittests/test_spp_op.py
index efd7f2e1bb48d16442432333df3df3dceedd3945..3cbfc2a703f1c4a24674d468cd1152bfa6eb8ad2 100644
--- a/python/paddle/fluid/tests/unittests/test_spp_op.py
+++ b/python/paddle/fluid/tests/unittests/test_spp_op.py
@@ -14,9 +14,9 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
-from .test_pool2d_op import max_pool2D_forward_naive
-from .test_pool2d_op import avg_pool2D_forward_naive
+from op_test import OpTest
+from test_pool2d_op import max_pool2D_forward_naive
+from test_pool2d_op import avg_pool2D_forward_naive
 
 
 class TestSppOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_squared_l2_distance_op.py b/python/paddle/fluid/tests/unittests/test_squared_l2_distance_op.py
index 1edd243c9281eb4ccf700b60c75a42a2de96e7de..78bc300ebec1cd34e44343d47376fef05a6d0135 100644
--- a/python/paddle/fluid/tests/unittests/test_squared_l2_distance_op.py
+++ b/python/paddle/fluid/tests/unittests/test_squared_l2_distance_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSquaredL2DistanceOp_f0(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_squared_l2_norm_op.py b/python/paddle/fluid/tests/unittests/test_squared_l2_norm_op.py
index e174d1f86bef4c4357816ccbb6b1207abab54518..609445d52287f421e67a5796f9e50c1fb42c8e49 100644
--- a/python/paddle/fluid/tests/unittests/test_squared_l2_norm_op.py
+++ b/python/paddle/fluid/tests/unittests/test_squared_l2_norm_op.py
@@ -15,7 +15,7 @@
 import numpy as np
 import unittest
 from numpy import linalg as LA
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestL2LossOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_squeeze_op.py b/python/paddle/fluid/tests/unittests/test_squeeze_op.py
index 725ebdc0642081c646bb14ea841388605be8f361..bca6af2fd5dfadbc48cf1a76cfa6ffd4f1fdfdef 100644
--- a/python/paddle/fluid/tests/unittests/test_squeeze_op.py
+++ b/python/paddle/fluid/tests/unittests/test_squeeze_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 
-from .op_test import OpTest
+from op_test import OpTest
 
 
 # Correct: General.
diff --git a/python/paddle/fluid/tests/unittests/test_sum_mkldnn_op.py b/python/paddle/fluid/tests/unittests/test_sum_mkldnn_op.py
index 9984638c1b5ddc482b597a8048f6a1d43e69190e..7956897d68a3fb49d62ba696d0b6400b4f909989 100644
--- a/python/paddle/fluid/tests/unittests/test_sum_mkldnn_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sum_mkldnn_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 
-from .test_sum_op import TestSumOp
+from test_sum_op import TestSumOp
 
 
 class TestMKLDNN(TestSumOp):
diff --git a/python/paddle/fluid/tests/unittests/test_sum_op.py b/python/paddle/fluid/tests/unittests/test_sum_op.py
index d1798075b3c27dfc1c3d13b10cbf47063bc647ac..1d90414e137a70e6265042e24e106fe565802778 100644
--- a/python/paddle/fluid/tests/unittests/test_sum_op.py
+++ b/python/paddle/fluid/tests/unittests/test_sum_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestSumOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_target_assign_op.py b/python/paddle/fluid/tests/unittests/test_target_assign_op.py
index 67cf60a80b0028fcea8e26b38a588d96727fbb3c..bd208897520122b6a5dcf71da325b1b9dba632f6 100644
--- a/python/paddle/fluid/tests/unittests/test_target_assign_op.py
+++ b/python/paddle/fluid/tests/unittests/test_target_assign_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 import random
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def gen_match_and_neg_indices(num_prior, gt_lod, neg_lod):
diff --git a/python/paddle/fluid/tests/unittests/test_top_k_op.py b/python/paddle/fluid/tests/unittests/test_top_k_op.py
index eca8cbd7a353e55060e290f8815d5a8ba0b84652..cbc3da550306b9febe8a8fd22e7f71efa572a3d0 100644
--- a/python/paddle/fluid/tests/unittests/test_top_k_op.py
+++ b/python/paddle/fluid/tests/unittests/test_top_k_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestTopkOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_transpose_op.py b/python/paddle/fluid/tests/unittests/test_transpose_op.py
index dc4ddecaaf1163123f27d521e1a50c551edb1c46..ebd63fbd495354eafe298ad5cc3456a196538a6a 100644
--- a/python/paddle/fluid/tests/unittests/test_transpose_op.py
+++ b/python/paddle/fluid/tests/unittests/test_transpose_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestTransposeOp(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_uniform_random_batch_size_like_op.py b/python/paddle/fluid/tests/unittests/test_uniform_random_batch_size_like_op.py
index a40129e74ef189bd930759a4e08b41390e558b8e..e033e86114f17d37c01480fe8350648eb8aa27cb 100644
--- a/python/paddle/fluid/tests/unittests/test_uniform_random_batch_size_like_op.py
+++ b/python/paddle/fluid/tests/unittests/test_uniform_random_batch_size_like_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 class TestUniformRandomBatchSizeLike(OpTest):
diff --git a/python/paddle/fluid/tests/unittests/test_uniform_random_op.py b/python/paddle/fluid/tests/unittests/test_uniform_random_op.py
index 80eb90e98efc56be5cd11d13444bc5f9863f9b07..346a949b6e7c96b5535f5e65ddbada11e110a0a7 100644
--- a/python/paddle/fluid/tests/unittests/test_uniform_random_op.py
+++ b/python/paddle/fluid/tests/unittests/test_uniform_random_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 import paddle.fluid.core as core
 from paddle.fluid.op import Operator
 
diff --git a/python/paddle/fluid/tests/unittests/test_unpool_op.py b/python/paddle/fluid/tests/unittests/test_unpool_op.py
index 1c9ca00cdb33ddaaa20a7bd24297ca5960225f84..ecce4cdde2d648fe7d65427e34c77f5f9ad61417 100644
--- a/python/paddle/fluid/tests/unittests/test_unpool_op.py
+++ b/python/paddle/fluid/tests/unittests/test_unpool_op.py
@@ -14,7 +14,7 @@
 
 import unittest
 import numpy as np
-from .op_test import OpTest
+from op_test import OpTest
 
 
 def unpool2dmax_forward_naive(input, indices, ksize, strides, paddings):
diff --git a/python/paddle/fluid/tests/unittests/test_unsqueeze_op.py b/python/paddle/fluid/tests/unittests/test_unsqueeze_op.py
index f0ab1e8f84b93d7b834ad105d401d6ba963fe4f3..7a4aa0a40b5eb494f6027e800ca6b466bbe1c302 100644
--- a/python/paddle/fluid/tests/unittests/test_unsqueeze_op.py
+++ b/python/paddle/fluid/tests/unittests/test_unsqueeze_op.py
@@ -15,7 +15,7 @@
 import unittest
 import numpy as np
 
-from .op_test import OpTest
+from op_test import OpTest
 
 
 # Correct: General.
diff --git a/python/paddle/fluid/tests/unittests/test_warpctc_op.py b/python/paddle/fluid/tests/unittests/test_warpctc_op.py
index 3e1d99df7fa2e308b8df0dfc299426e09fb23090..9f1aaee472f918da7deb8816a0a4654dafe74a30 100644
--- a/python/paddle/fluid/tests/unittests/test_warpctc_op.py
+++ b/python/paddle/fluid/tests/unittests/test_warpctc_op.py
@@ -15,8 +15,8 @@
 import sys
 import unittest
 import numpy as np
-from .op_test import OpTest
-from .test_softmax_op import stable_softmax
+from op_test import OpTest
+from test_softmax_op import stable_softmax
 
 CUDA_BLOCK_SIZE = 512