diff --git a/tests/test_caldav.py b/tests/test_caldav.py
index 13e5666..4f3b00a 100644
--- a/tests/test_caldav.py
+++ b/tests/test_caldav.py
@@ -617,6 +617,7 @@ def setup_method(self):
         self.caldav = client(**self.server_params)
 
         if self.check_compatibility_flag("rate_limited"):
+
             def delay_decorator(f):
                 def foo(*a, **kwa):
                     time.sleep(60)
@@ -2082,7 +2083,9 @@ def testTodoDatesearch(self):
         assert len(todos2) == foo
 
         ## verify that "expand" works
-        if not self.check_compatibility_flag("no_recurring") and not self.check_compatibility_flag("no_recurring_todo"):
+        if not self.check_compatibility_flag(
+            "no_recurring"
+        ) and not self.check_compatibility_flag("no_recurring_todo"):
             ## todo1 and todo2 should be the same (todo1 using legacy method)
             ## todo1 and todo2 tries doing server side expand, with fallback
             ## to client side expand