diff --git a/marshmallow_polyfield/polyfield.py b/marshmallow_polyfield/polyfield.py
index 4971778..944a88a 100644
--- a/marshmallow_polyfield/polyfield.py
+++ b/marshmallow_polyfield/polyfield.py
@@ -6,7 +6,7 @@
 
 class PolyFieldBase(Field, metaclass=abc.ABCMeta):
     def __init__(self, many=False, **metadata):
-        super(PolyFieldBase, self).__init__(**metadata)
+        super().__init__(**metadata)
         self.many = many
 
     def _deserialize(self, value, attr, parent, **kwargs):
@@ -112,7 +112,7 @@ def __init__(
         and returns the appropriate schema
 
         """
-        super(PolyField, self).__init__(many=many, **metadata)
+        super().__init__(many=many, **metadata)
         self._serialization_schema_selector_arg = serialization_schema_selector
         self._deserialization_schema_selector_arg = deserialization_schema_selector
 
diff --git a/tests/shapes.py b/tests/shapes.py
index 3e642bc..94ab399 100644
--- a/tests/shapes.py
+++ b/tests/shapes.py
@@ -19,7 +19,7 @@ def make_object(self, data, **_):
 
 class Triangle(Shape):
     def __init__(self, color, base, height):
-        super(Triangle, self).__init__(color)
+        super().__init__(color)
         self.base = base
         self.height = height
 
@@ -39,7 +39,7 @@ def make_object(self, data, **_):
 
 class Rectangle(Shape):
     def __init__(self, color, length, width):
-        super(Rectangle, self).__init__(color)
+        super().__init__(color)
         self.length = length
         self.width = width
 
diff --git a/tests/test_polyfield_base.py b/tests/test_polyfield_base.py
index a2ff228..96d4969 100644
--- a/tests/test_polyfield_base.py
+++ b/tests/test_polyfield_base.py
@@ -3,10 +3,10 @@
 
 class TrivialExample(PolyFieldBase):
     def serialization_schema_selector(self, value, obj):
-        super(TrivialExample, self).serialization_schema_selector(value, obj)
+        super().serialization_schema_selector(value, obj)
 
     def deserialization_schema_selector(self, value, obj):
-        super(TrivialExample, self).deserialization_schema_selector(value, obj)
+        super().deserialization_schema_selector(value, obj)
 
 
 def test_polyfield_base():