fix: code style
diff --git a/tensorflow/python/util/serialization_test.py b/tensorflow/python/util/serialization_test.py
index 501dcda..97a3c4b 100644
--- a/tensorflow/python/util/serialization_test.py
+++ b/tensorflow/python/util/serialization_test.py
@@ -114,4 +114,4 @@
 
 
 if __name__ == "__main__":
-    test.main()
+  test.main()