diff --git a/django-stubs/db/migrations/operations/models.pyi b/django-stubs/db/migrations/operations/models.pyi
index b255821..2676046 100644
--- a/django-stubs/db/migrations/operations/models.pyi
+++ b/django-stubs/db/migrations/operations/models.pyi
@@ -74,9 +74,9 @@ class IndexOperation(Operation):
 class AddIndex(IndexOperation):
     model_name: str = ...
     index: Index = ...
-    def __init__(self, model_name: str, index: Index) -> None: ...
+    def __init__(self, model_name: str, index: Union[str, Index]) -> None: ...
 
 class RemoveIndex(IndexOperation):
     model_name: str = ...
     name: str = ...
-    def __init__(self, model_name: str, name: str) -> None: ...
+    def __init__(self, model_name: str, name: Union[str, Index]) -> None: ...
diff --git a/django-stubs/db/models/fields/__init__.pyi b/django-stubs/db/models/fields/__init__.pyi
index c871813..b358e79 100644
--- a/django-stubs/db/models/fields/__init__.pyi
+++ b/django-stubs/db/models/fields/__init__.pyi
@@ -74,6 +74,7 @@ class SmallIntegerField(IntegerField): ...
 class BigIntegerField(IntegerField): ...
 
 class FloatField(Field):
+    def __set__(self, instance, value: Union[float, int, Combinable]) -> float: ...
     def __get__(self, instance, owner) -> float: ...
 
 class DecimalField(Field):
@@ -99,6 +100,7 @@ class DecimalField(Field):
         validators: Iterable[_ValidatorCallable] = ...,
         error_messages: Optional[_ErrorMessagesToOverride] = ...,
     ): ...
+    def __set__(self, instance, value: Union[str, Combinable]) -> decimal.Decimal: ...
     def __get__(self, instance, owner) -> decimal.Decimal: ...
 
 class AutoField(Field):
diff --git a/scripts/mypy.ini b/scripts/mypy.ini
index 162dd63..e105b01 100644
--- a/scripts/mypy.ini
+++ b/scripts/mypy.ini
@@ -5,6 +5,7 @@ check_untyped_defs = True
 warn_no_return = False
 show_traceback = True
 warn_redundant_casts = True
+allow_redefinition = True
 
 plugins =
     mypy_django_plugin.main
diff --git a/scripts/typecheck_tests.py b/scripts/typecheck_tests.py
index dd52320..c82b360 100644
--- a/scripts/typecheck_tests.py
+++ b/scripts/typecheck_tests.py
@@ -194,6 +194,7 @@ IGNORED_ERRORS = {
         + 'expected "Optional[Sequence[Union[Type[Model], str]]]"',
         'Argument 1 to "RunPython" has incompatible type "str"; expected "Callable[..., Any]"',
         'FakeLoader',
+        'Argument 1 to "append" of "list" has incompatible type "AddIndex"; expected "CreateModel"'
     ],
     'queryset_pickle': [
         '"None" has no attribute "somefield"'
@@ -412,10 +413,8 @@ TESTS_DIRS = [
     # TODO: 'middleware_exceptions',
     'migrate_signals',
     'migration_test_data_persistence',
-    # wait for redefinitions
-    # TODO: 'migrations',
+    'migrations',
     'migrations2',
-    # waits for allow redefinitions
     # TODO: 'model_fields',
     # TODO: 'model_forms',
     'model_formsets',
@@ -493,8 +492,7 @@ TESTS_DIRS = [
     'transactions',
     'unmanaged_models',
 
-    # wait for "allow redefinitions" here
-    # TODO: 'update',
+    'update',
 
     'update_only_fields',
     'urlpatterns',