diff --git a/python/paddle/fluid/tests/unittests/test_eye_op.py b/python/paddle/fluid/tests/unittests/test_eye_op.py
index 2b4af0fbdb9ca3091d23266d3dab8c5e6041d255..f95dfcb24e2ebdbc7639ae39a946a61e9c60b308 100644
--- a/python/paddle/fluid/tests/unittests/test_eye_op.py
+++ b/python/paddle/fluid/tests/unittests/test_eye_op.py
@@ -31,7 +31,7 @@ class TestEyeOp(OpTest):
 
     def setUp(self):
         '''
-	Test eye op with specified shape
+        Test eye op with specified shape
         '''
         self.python_api = paddle.eye
         self.op_type = "eye"
@@ -52,7 +52,7 @@ class TestEyeOp1(OpTest):
 
     def setUp(self):
         '''
-	Test eye op with default parameters
+        Test eye op with default parameters
         '''
         self.python_api = paddle.eye
         self.op_type = "eye"
diff --git a/python/paddle/fluid/tests/unittests/test_generate_proposal_labels_op.py b/python/paddle/fluid/tests/unittests/test_generate_proposal_labels_op.py
index d1bf246b5a75a347df52667788b1274ef598d75b..d497dbe7274831485e65e038cc80493d54c27070 100644
--- a/python/paddle/fluid/tests/unittests/test_generate_proposal_labels_op.py
+++ b/python/paddle/fluid/tests/unittests/test_generate_proposal_labels_op.py
@@ -231,10 +231,10 @@ def _box_to_delta(ex_boxes, gt_boxes, weights):
 def _expand_bbox_targets(bbox_targets_input, class_nums, is_cls_agnostic):
     class_labels = bbox_targets_input[:, 0]
     fg_inds = np.where(class_labels > 0)[0]
-    #if is_cls_agnostic:
-    #	class_labels = [1 if ll > 0 else 0 for ll in class_labels]
-    #    class_labels = np.array(class_labels, dtype=np.int32)
-    #	class_nums = 2
+    # if is_cls_agnostic:
+    #     class_labels = [1 if ll > 0 else 0 for ll in class_labels]
+    #     class_labels = np.array(class_labels, dtype=np.int32)
+    #     class_nums = 2
     bbox_targets = np.zeros((class_labels.shape[0],
                              4 * class_nums if not is_cls_agnostic else 4 * 2))
     bbox_inside_weights = np.zeros(bbox_targets.shape)
diff --git a/python/paddle/fluid/tests/unittests/test_generate_proposals_op.py b/python/paddle/fluid/tests/unittests/test_generate_proposals_op.py
index 51fbb60a7b4d1ac1bdde05d77745a54dc738edc1..d98695026f80f69f8bc5540fc126ce8e09144a45 100644
--- a/python/paddle/fluid/tests/unittests/test_generate_proposals_op.py
+++ b/python/paddle/fluid/tests/unittests/test_generate_proposals_op.py
@@ -213,7 +213,7 @@ def filter_boxes(boxes, min_size, im_info, pixel_offset=True):
 
 def iou(box_a, box_b, pixel_offset=True):
     """
-	Apply intersection-over-union overlap between box_a and box_b
+    Apply intersection-over-union overlap between box_a and box_b
     """
     xmin_a = min(box_a[0], box_a[2])
     ymin_a = min(box_a[1], box_a[3])
diff --git a/python/paddle/fluid/tests/unittests/test_optimizer.py b/python/paddle/fluid/tests/unittests/test_optimizer.py
index df470bc9ec1cbacd5e32d729d3d761dd0894c2c7..666391c49124a2654a14330b64072b805c02a713 100644
--- a/python/paddle/fluid/tests/unittests/test_optimizer.py
+++ b/python/paddle/fluid/tests/unittests/test_optimizer.py
@@ -1041,8 +1041,8 @@ class TestRecomputeOptimizer(unittest.TestCase):
     def test_dropout_with_seed(self):
         """
         when we recompute a dropout op, make sure that the recomputed one
-	    is the same as the original var.
-	    """
+        is the same as the original var.
+        """
 
         def gen_data():
             return {
diff --git a/python/paddle/fluid/tests/unittests/test_recurrent_op.py b/python/paddle/fluid/tests/unittests/test_recurrent_op.py
index b799b116c1d26f374001d6c480b8883051522ab8..45af0bc55a73ef60f5e0131c0c0d101d1a8c6a91 100644
--- a/python/paddle/fluid/tests/unittests/test_recurrent_op.py
+++ b/python/paddle/fluid/tests/unittests/test_recurrent_op.py
@@ -619,7 +619,7 @@ class RecurrentOpStopGradientTest(RecurrentOpTest1):
         h_t = \sigma (W x_t + U h_{t-1})
     weights:
         - W
-	- U
+        - U
     vars:
         - x
     memories:
diff --git a/python/paddle/fluid/tests/unittests/xpu/test_generate_proposals_v2_op_xpu.py b/python/paddle/fluid/tests/unittests/xpu/test_generate_proposals_v2_op_xpu.py
index 90c18dbff2f093a80530e41874789931858d1c1d..54cf3769ebac84ff66872b47c2be61c27f9ef59f 100644
--- a/python/paddle/fluid/tests/unittests/xpu/test_generate_proposals_v2_op_xpu.py
+++ b/python/paddle/fluid/tests/unittests/xpu/test_generate_proposals_v2_op_xpu.py
@@ -132,7 +132,7 @@ def filter_boxes(boxes, min_size, im_shape, pixel_offset=True):
 
 def iou(box_a, box_b, pixel_offset=True):
     """
-	Apply intersection-over-union overlap between box_a and box_b
+    Apply intersection-over-union overlap between box_a and box_b
     """
     xmin_a = min(box_a[0], box_a[2])
     ymin_a = min(box_a[1], box_a[3])