diff --git a/django_cockroachdb/creation.py b/django_cockroachdb/creation.py
index 97c33ee7..bf63baec 100644
--- a/django_cockroachdb/creation.py
+++ b/django_cockroachdb/creation.py
@@ -79,10 +79,6 @@ def mark_expected_failures(self):
             'serializers.test_data.SerializerDataTests.test_python_serializer',
             'serializers.test_data.SerializerDataTests.test_xml_serializer',
             'serializers.test_data.SerializerDataTests.test_yaml_serializer',
-            # https://github.com/cockroachdb/cockroach/issues/49329#issuecomment-664677082
-            'schema.tests.SchemaTests.test_alter',
-            'schema.tests.SchemaTests.test_alter_numeric_field_keep_null_status',
-            'schema.tests.SchemaTests.test_alter_smallint_pk_to_smallautofield_pk',
             # cockroachdb doesn't distinguish between tables and views. Both
             # are included regardless of whether inspectdb's --include-views
             # option is set.
diff --git a/django_cockroachdb/schema.py b/django_cockroachdb/schema.py
index 11d90dce..ca2a9da1 100644
--- a/django_cockroachdb/schema.py
+++ b/django_cockroachdb/schema.py
@@ -44,9 +44,6 @@ def _alter_field(self, model, old_field, new_field, old_type, new_type,
 
     def _alter_column_type_sql(self, model, old_field, new_field, new_type):
         self.sql_alter_column_type = 'ALTER COLUMN %(column)s TYPE %(type)s'
-        # Cast when data type changed.
-        if self._field_data_type(old_field) != self._field_data_type(new_field):
-            self.sql_alter_column_type += ' USING %(column)s::%(type)s'
         # Make ALTER TYPE with SERIAL make sense.
         # table = strip_quotes(model._meta.db_table)
         serial_fields_map = {'bigserial': 'bigint', 'serial': 'integer', 'smallserial': 'smallint'}