diff --git a/official/projects/mosaic/qat/modeling/heads/mosaic_head_test.py b/official/projects/mosaic/qat/modeling/heads/mosaic_head_test.py
index 3c257c7b0e..4c4b31ca8d 100644
--- a/official/projects/mosaic/qat/modeling/heads/mosaic_head_test.py
+++ b/official/projects/mosaic/qat/modeling/heads/mosaic_head_test.py
@@ -14,7 +14,6 @@
 
 """Tests for mosaic_head."""
 
-# Import libraries
 from absl.testing import parameterized
 import tensorflow as tf, tf_keras
 
diff --git a/official/projects/mosaic/qat/modeling/layers/nn_blocks_test.py b/official/projects/mosaic/qat/modeling/layers/nn_blocks_test.py
index 3cc8e7baec..c47bd005a5 100644
--- a/official/projects/mosaic/qat/modeling/layers/nn_blocks_test.py
+++ b/official/projects/mosaic/qat/modeling/layers/nn_blocks_test.py
@@ -15,7 +15,6 @@
 """Tests for nn_blocks."""
 
 from typing import Any, Iterable, Tuple
-# Import libraries
 from absl.testing import parameterized
 import tensorflow as tf, tf_keras
 
diff --git a/official/projects/pix2seq/dataloaders/pix2seq_input_test.py b/official/projects/pix2seq/dataloaders/pix2seq_input_test.py
index c5f39a832f..8f066718b6 100644
--- a/official/projects/pix2seq/dataloaders/pix2seq_input_test.py
+++ b/official/projects/pix2seq/dataloaders/pix2seq_input_test.py
@@ -15,7 +15,6 @@
 """Tests for Pix2Seq input."""
 import io
 
-# Import libraries
 import numpy as np
 from PIL import Image
 import tensorflow as tf, tf_keras
diff --git a/official/projects/pointpillars/modeling/factory_test.py b/official/projects/pointpillars/modeling/factory_test.py
index 9a3f73b3cc..e59373f4be 100644
--- a/official/projects/pointpillars/modeling/factory_test.py
+++ b/official/projects/pointpillars/modeling/factory_test.py
@@ -14,7 +14,6 @@
 
 """Tests for factory.py."""
 
-# Import libraries
 from absl.testing import parameterized
 import tensorflow as tf, tf_keras
 
diff --git a/official/projects/qat/nlp/pretrained_checkpoint_converter.py b/official/projects/qat/nlp/pretrained_checkpoint_converter.py
index 7caf6bf88d..e35edd2101 100644
--- a/official/projects/qat/nlp/pretrained_checkpoint_converter.py
+++ b/official/projects/qat/nlp/pretrained_checkpoint_converter.py
@@ -15,8 +15,6 @@
 """A converter for BERT pretrained checkpoint to QAT BERT checkpoint."""
 import tempfile
 
-# Import libraries
-
 from absl import app
 from absl import flags
 import tensorflow as tf, tf_keras
diff --git a/official/projects/token_dropping/encoder_test.py b/official/projects/token_dropping/encoder_test.py
index 85fbdd09cc..2bd572bc22 100644
--- a/official/projects/token_dropping/encoder_test.py
+++ b/official/projects/token_dropping/encoder_test.py
@@ -14,7 +14,6 @@
 
 """Tests for transformer-based bert encoder network."""
 
-# Import libraries
 from absl.testing import parameterized
 import numpy as np
 import tensorflow as tf, tf_keras
diff --git a/official/projects/video_ssl/dataloaders/video_ssl_input_test.py b/official/projects/video_ssl/dataloaders/video_ssl_input_test.py
index 7c33b4025c..aa2dfb2f72 100644
--- a/official/projects/video_ssl/dataloaders/video_ssl_input_test.py
+++ b/official/projects/video_ssl/dataloaders/video_ssl_input_test.py
@@ -15,7 +15,6 @@
 
 import io
 
-# Import libraries
 import numpy as np
 from PIL import Image
 import tensorflow as tf, tf_keras
diff --git a/official/projects/video_ssl/losses/losses.py b/official/projects/video_ssl/losses/losses.py
index 7e4d356788..dff72b72fa 100644
--- a/official/projects/video_ssl/losses/losses.py
+++ b/official/projects/video_ssl/losses/losses.py
@@ -14,7 +14,6 @@
 
 """Define losses."""
 
-# Import libraries
 import tensorflow as tf, tf_keras
 from tensorflow.compiler.tf2xla.python import xla
 
diff --git a/official/projects/video_ssl/modeling/video_ssl_model.py b/official/projects/video_ssl/modeling/video_ssl_model.py
index 27e1672109..84be35ef26 100644
--- a/official/projects/video_ssl/modeling/video_ssl_model.py
+++ b/official/projects/video_ssl/modeling/video_ssl_model.py
@@ -15,8 +15,6 @@
 """Build video classification models."""
 from typing import Mapping, Optional
 
-# Import libraries
-
 import tensorflow as tf, tf_keras
 
 from official.modeling import tf_utils
diff --git a/official/projects/yolo/modeling/decoders/yolo_decoder_test.py b/official/projects/yolo/modeling/decoders/yolo_decoder_test.py
index 2ba0bad881..4f8061b2ba 100644
--- a/official/projects/yolo/modeling/decoders/yolo_decoder_test.py
+++ b/official/projects/yolo/modeling/decoders/yolo_decoder_test.py
@@ -14,7 +14,6 @@
 
 """Tests for YOLO."""
 
-# Import libraries
 from absl.testing import parameterized
 import tensorflow as tf, tf_keras
 
diff --git a/official/projects/yolo/modeling/heads/yolo_head_test.py b/official/projects/yolo/modeling/heads/yolo_head_test.py
index 52a57cab73..150662e712 100644
--- a/official/projects/yolo/modeling/heads/yolo_head_test.py
+++ b/official/projects/yolo/modeling/heads/yolo_head_test.py
@@ -14,7 +14,6 @@
 
 """Tests for yolo heads."""
 
-# Import libraries
 from absl.testing import parameterized
 import tensorflow as tf, tf_keras