diff --git a/unittests/test_sss_helper.py b/unittests/test_sss_helper.py
index 8baab849517cbc56ab489815fda276ce6a7d74e0..caaf49d46ecfd73cfcb787add80d003ed1b22001 100644
--- a/unittests/test_sss_helper.py
+++ b/unittests/test_sss_helper.py
@@ -86,6 +86,8 @@ def test_send_mail():
     assert msg.get_content() == "hello!\n"
 
 # skip on windows (has no sendmail)
+
+
 @mark.skipif(platform.system() == "Windows", reason="no sendmail on Windows")
 def test_send_mail_error():
     with raises(subprocess.CalledProcessError):
diff --git a/unittests/test_table_importer.py b/unittests/test_table_importer.py
index fc0d5f0e5ea3273bfebcd4e46155c141eb14d1ac..c1336ee5a62e361564cb52ed79c380aab7bdb9a1 100644
--- a/unittests/test_table_importer.py
+++ b/unittests/test_table_importer.py
@@ -196,7 +196,7 @@ class TableImporterTest(unittest.TestCase):
                            [5678, 1, 2.0, 3, 'yes']],
                           columns=['a', 'b', 'c', 'float', 'd'])
         # wrong datatypes before
-        assert df["a"].dtype !=  pd.StringDtype
+        assert df["a"].dtype != pd.StringDtype
         assert df["float"].dtype != float
         # strict = False by default, so this shouldn't raise an error
         importer.check_datatype(df)