diff --git a/pandas/core/series.py b/pandas/core/series.py
index b9b4c4ea139d65..fa913fcb54c96a 100644
--- a/pandas/core/series.py
+++ b/pandas/core/series.py
@@ -12,7 +12,7 @@
 
 from pandas._config import get_option
 
-from pandas._libs import iNaT, index as libindex, lib, tslibs, reshape
+from pandas._libs import iNaT, index as libindex, lib, reshape, tslibs
 from pandas.compat import PY36
 from pandas.compat.numpy import function as nv
 from pandas.util._decorators import Appender, Substitution, deprecate
@@ -27,13 +27,13 @@
     is_datetime64_dtype,
     is_datetimelike,
     is_dict_like,
-    is_object_dtype,
     is_extension_array_dtype,
     is_extension_type,
     is_hashable,
     is_integer,
     is_iterator,
     is_list_like,
+    is_object_dtype,
     is_scalar,
     is_string_like,
     is_timedelta64_dtype,
diff --git a/pandas/tests/series/test_explode.py b/pandas/tests/series/test_explode.py
index 10bf488a13d53e..0c97026ccb4d5f 100644
--- a/pandas/tests/series/test_explode.py
+++ b/pandas/tests/series/test_explode.py
@@ -1,5 +1,5 @@
-import pytest
 import numpy as np
+import pytest
 
 import pandas as pd
 from pandas.util import testing as tm