pyderasn.py            |  8 ++++----
 tests/test_pyderasn.py | 12 ++++++------

diff --git a/pyderasn.py b/pyderasn.py
index c69060481b3737cdba80c2bdb75de3edcb9ef901eabe44b7842f802958a53d91..66e2c4f8308402cc5f305255c042069be44c396dfeca207afb21ad48e2323528 100755
--- a/pyderasn.py
+++ b/pyderasn.py
@@ -6107,7 +6107,7 @@     **NAMEDTUPLE_KWARGS
 )
 
 
-class SequenceEncode1stMixing:
+class SequenceEncode1stMixin:
     __slots__ = ()
 
     def _encode1st(self, state):
@@ -6121,7 +6121,7 @@         state[idx] = vlen
         return len(self.tag) + len_size(vlen) + vlen, state
 
 
-class Sequence(SequenceEncode1stMixing, Obj):
+class Sequence(SequenceEncode1stMixin, Obj):
     """``SEQUENCE`` structure type
 
     You have to make specification of sequence::
@@ -6619,7 +6619,7 @@         for pp in self.pps_lenindef(decode_path):
             yield pp
 
 
-class Set(Sequence, SequenceEncode1stMixing):
+class Set(Sequence, SequenceEncode1stMixin):
     """``SET`` structure type
 
     Its usage is identical to :py:class:`pyderasn.Sequence`.
@@ -6822,7 +6822,7 @@     **NAMEDTUPLE_KWARGS
 )
 
 
-class SequenceOf(SequenceEncode1stMixing, Obj):
+class SequenceOf(SequenceEncode1stMixin, Obj):
     """``SEQUENCE OF`` sequence type
 
     For that kind of type you must specify the object it will carry on
diff --git a/tests/test_pyderasn.py b/tests/test_pyderasn.py
index 94122189a4677942b8eb4574b1aa393c055c3d068e420aebd5ac020d385c5fd8..c4705f474bb8a5f2bf9aa462d46e7d13abe9c3a8033c7cc35e57749d2dfa8d3e 100644
--- a/tests/test_pyderasn.py
+++ b/tests/test_pyderasn.py
@@ -5937,7 +5937,7 @@         expect_outers.append(expect)
     return seq_outer, expect_outers
 
 
-class SeqMixing(object):
+class SeqMixin(object):
     def test_invalid_value_type(self):
         with self.assertRaises(InvalidValueType) as err:
             self.base_klass(123)
@@ -6451,7 +6451,7 @@         self.assertFalse(decoded.lenindef)
         self.assertTrue(decoded.bered)
 
 
-class TestSequence(SeqMixing, CommonMixin, TestCase):
+class TestSequence(SeqMixin, CommonMixin, TestCase):
     base_klass = Sequence
 
     @given(
@@ -6497,7 +6497,7 @@         self.assertEqual(seq["name"], "Smith")
         self.assertEqual(seq["ok"], True)
 
 
-class TestSet(SeqMixing, CommonMixin, TestCase):
+class TestSet(SeqMixin, CommonMixin, TestCase):
     base_klass = Set
 
     @settings(max_examples=LONG_TEST_MAX_EXAMPLES)
@@ -6612,7 +6612,7 @@         _decoded,
     )
 
 
-class SeqOfMixing(object):
+class SeqOfMixin(object):
     def test_invalid_value_type(self):
         with self.assertRaises(InvalidValueType) as err:
             self.base_klass(123)
@@ -7082,7 +7082,7 @@         self.assertFalse(decoded.lenindef)
         self.assertTrue(decoded.bered)
 
 
-class TestSequenceOf(SeqOfMixing, CommonMixin, TestCase):
+class TestSequenceOf(SeqOfMixin, CommonMixin, TestCase):
     class SeqOf(SequenceOf):
         schema = "whatever"
     base_klass = SeqOf
@@ -7166,7 +7166,7 @@         seqof = SeqOf()
         self.assertFalse(seqof.ready)
 
 
-class TestSetOf(SeqOfMixing, CommonMixin, TestCase):
+class TestSetOf(SeqOfMixin, CommonMixin, TestCase):
     class SeqOf(SetOf):
         schema = "whatever"
     base_klass = SeqOf