diff --git a/ignite/contrib/handlers/custom_events.py b/ignite/contrib/handlers/custom_events.py
index 32692889699..7eaa65863d5 100644
--- a/ignite/contrib/handlers/custom_events.py
+++ b/ignite/contrib/handlers/custom_events.py
@@ -54,7 +54,6 @@ def on_every_10_epochs(engine):
     """
 
     def __init__(self, n_iterations=None, n_epochs=None):
-
         warnings.warn(
             "CustomPeriodicEvent is deprecated since 0.4.0 and will be removed in 0.4.14. Use filtered events instead.",
             DeprecationWarning,
diff --git a/tests/ignite/contrib/handlers/test_custom_events.py b/tests/ignite/contrib/handlers/test_custom_events.py
index 9686c707141..90decc1e298 100644
--- a/tests/ignite/contrib/handlers/test_custom_events.py
+++ b/tests/ignite/contrib/handlers/test_custom_events.py
@@ -7,7 +7,6 @@
 
 
 def test_bad_input():
-
     with pytest.warns(DeprecationWarning, match=r"CustomPeriodicEvent is deprecated"):
         with pytest.raises(TypeError, match="Argument n_iterations should be an integer"):
             CustomPeriodicEvent(n_iterations="a")
diff --git a/tests/ignite/contrib/handlers/test_tqdm_logger.py b/tests/ignite/contrib/handlers/test_tqdm_logger.py
index d99f5e78264..81522b1d0a6 100644
--- a/tests/ignite/contrib/handlers/test_tqdm_logger.py
+++ b/tests/ignite/contrib/handlers/test_tqdm_logger.py
@@ -469,7 +469,6 @@ def test_pbar_wrong_events_order():
 
 
 def test_pbar_on_custom_events(capsys):
-
     engine = Engine(update_fn)
     pbar = ProgressBar()
     with pytest.warns(DeprecationWarning, match="CustomPeriodicEvent is deprecated"):