diff --git a/tensorflow_privacy/privacy/optimizers/dp_optimizer.py b/tensorflow_privacy/privacy/optimizers/dp_optimizer.py
index f0687b1a..a2164e1d 100644
--- a/tensorflow_privacy/privacy/optimizers/dp_optimizer.py
+++ b/tensorflow_privacy/privacy/optimizers/dp_optimizer.py
@@ -17,6 +17,8 @@
 import tensorflow as tf
 from tensorflow_privacy.privacy.dp_query import gaussian_query
 
+# Add a random comment for no reason.
+
 
 def make_optimizer_class(cls):
   """Given a subclass of `tf.compat.v1.train.Optimizer`, returns a DP-SGD subclass of it.