diff --git a/bigframes/operations/_matplotlib/core.py b/bigframes/operations/_matplotlib/core.py
index 6d1722003f..4b15d6f4dd 100644
--- a/bigframes/operations/_matplotlib/core.py
+++ b/bigframes/operations/_matplotlib/core.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import abc
+
 import matplotlib.pyplot as plt
 
 
diff --git a/bigframes/operations/plotting.py b/bigframes/operations/plotting.py
index ec173c1581..4d7972a166 100644
--- a/bigframes/operations/plotting.py
+++ b/bigframes/operations/plotting.py
@@ -18,6 +18,7 @@
 import bigframes.operations._matplotlib as plotbackend
 import third_party.bigframes_vendored.pandas.plotting._core as vendordt
 
+
 class PlotAccessor:
     __doc__ = vendordt.PlotAccessor.__doc__