diff --git a/kloppy/domain/services/event_factory.py b/kloppy/domain/services/event_factory.py
index fbbfaa69..33fe4f61 100644
--- a/kloppy/domain/services/event_factory.py
+++ b/kloppy/domain/services/event_factory.py
@@ -41,10 +41,6 @@ def create_event(event_cls: Type[T], **kwargs) -> T:
        but we filter those arguments out.
     """
     extra_kwargs = {"state": {}}
-
-    if "qualifiers" not in kwargs:
-        kwargs["qualifiers"] = None
-
     if "related_event_ids" not in kwargs:
         extra_kwargs["related_event_ids"] = []
 
diff --git a/kloppy/infra/serializers/event/sportec/deserializer.py b/kloppy/infra/serializers/event/sportec/deserializer.py
index be0b8104..fa29f753 100644
--- a/kloppy/infra/serializers/event/sportec/deserializer.py
+++ b/kloppy/infra/serializers/event/sportec/deserializer.py
@@ -112,10 +112,7 @@ def sportec_metadata_from_xml_elm(match_root) -> SportecMetadata:
     if not away_team:
         raise DeserializationError("Away team is missing from metadata")
 
-    (
-        home_score,
-        away_score,
-    ) = match_root.MatchInformation.General.attrib[
+    (home_score, away_score,) = match_root.MatchInformation.General.attrib[
         "Result"
     ].split(":")
     score = Score(home=int(home_score), away=int(away_score))
diff --git a/kloppy/infra/serializers/event/statsbomb/deserializer.py b/kloppy/infra/serializers/event/statsbomb/deserializer.py
index 920774a0..419e96ac 100644
--- a/kloppy/infra/serializers/event/statsbomb/deserializer.py
+++ b/kloppy/infra/serializers/event/statsbomb/deserializer.py
@@ -228,7 +228,7 @@ def create_periods(self, raw_events):
             ::2
         ]  # recorded for each team, take every other
         periods = []
-        for start_event, end_event in zip_longest(
+        for (start_event, end_event) in zip_longest(
             half_start_and_end_events[::2], half_start_and_end_events[1::2]
         ):
             if (