diff --git a/django-stubs/core/exceptions.pyi b/django-stubs/core/exceptions.pyi
index 74060d7..44a904b 100644
--- a/django-stubs/core/exceptions.pyi
+++ b/django-stubs/core/exceptions.pyi
@@ -1,6 +1,5 @@
-from typing import Any, Dict, Iterator, List, Optional, Tuple, Type, Union
+from typing import Any, Dict, Iterator, List, Mapping, Optional, Tuple, Union
 
-from django.db.models.base import Model
 from django.forms.utils import ErrorDict
 
 class FieldDoesNotExist(Exception): ...
@@ -31,20 +30,13 @@ class ValidationError(Exception):
     message: Any = ...
     code: Any = ...
     params: Any = ...
-    def __init__(
-        self,
-        message: Any,
-        code: Optional[str] = ...,
-        params: Optional[
-            Union[Dict[str, Union[Tuple[str], Type[Model], Model, str]], Dict[str, Union[int, str]]]
-        ] = ...,
-    ) -> None: ...
+    def __init__(self, message: Any, code: Optional[str] = ..., params: Optional[Mapping[str, Any]] = ...) -> None: ...
     @property
     def message_dict(self) -> Dict[str, List[str]]: ...
     @property
     def messages(self) -> List[str]: ...
     def update_error_dict(
-        self, error_dict: Union[Dict[str, List[ValidationError]], ErrorDict]
+        self, error_dict: Mapping[str, Any]
     ) -> Union[Dict[str, List[ValidationError]], ErrorDict]: ...
     def __iter__(self) -> Iterator[Union[Tuple[str, List[str]], str]]: ...
 
diff --git a/django-stubs/core/files/uploadedfile.pyi b/django-stubs/core/files/uploadedfile.pyi
index d991898..824f8b3 100644
--- a/django-stubs/core/files/uploadedfile.pyi
+++ b/django-stubs/core/files/uploadedfile.pyi
@@ -39,10 +39,10 @@ class InMemoryUploadedFile(UploadedFile):
         charset: Optional[str],
         content_type_extra: Dict[str, str] = ...,
     ) -> None: ...
-    def chunks(self, chunk_size: int = None) -> Iterator[bytes]: ...
-    def multiple_chunks(self, chunk_size: int = None) -> bool: ...
+    def chunks(self, chunk_size: Optional[int] = ...) -> Iterator[bytes]: ...
+    def multiple_chunks(self, chunk_size: Optional[int] = ...) -> bool: ...
 
 class SimpleUploadedFile(InMemoryUploadedFile):
-    def __init__(self, name: str, content: bytes, content_type: str = "") -> None: ...
+    def __init__(self, name: str, content: Optional[Union[bytes, str]], content_type: str = ...) -> None: ...
     @classmethod
     def from_dict(cls: Any, file_dict: Dict[str, Union[str, bytes]]) -> None: ...
diff --git a/django-stubs/forms/fields.pyi b/django-stubs/forms/fields.pyi
index 350db7d..d8ddc3c 100644
--- a/django-stubs/forms/fields.pyi
+++ b/django-stubs/forms/fields.pyi
@@ -1,12 +1,8 @@
-import decimal
-from datetime import date, datetime, time, timedelta
+from datetime import datetime, timedelta
 from decimal import Decimal
-from typing import Any, Callable, Dict, List, Optional, Tuple, Union, Type
-from uuid import UUID
+from typing import Any, Callable, List, Optional, Pattern, Sequence, Type, Union
 
-from django.core.files.base import File
 from django.core.validators import BaseValidator
-from django.db.models.fields.files import FieldFile
 from django.forms.boundfield import BoundField
 from django.forms.forms import BaseForm
 from django.forms.widgets import Widget
@@ -31,16 +27,16 @@ class Field:
         self,
         *,
         required: bool = ...,
-        widget: Optional[Any] = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
         label: Optional[Any] = ...,
         initial: Optional[Any] = ...,
         help_text: str = ...,
         error_messages: Optional[Any] = ...,
         show_hidden_initial: bool = ...,
-        validators: Any = ...,
+        validators: Sequence[Any] = ...,
         localize: bool = ...,
         disabled: bool = ...,
-        label_suffix: Optional[Any] = ...
+        label_suffix: Optional[Any] = ...,
     ) -> None: ...
     def prepare_value(self, value: Any) -> Any: ...
     def to_python(self, value: Optional[Any]) -> Optional[Any]: ...
@@ -49,60 +45,60 @@ class Field:
     def clean(self, value: Any) -> Any: ...
     def bound_data(self, data: Any, initial: Any) -> Any: ...
     def widget_attrs(self, widget: Widget) -> Any: ...
-    def has_changed(self, initial: Any, data: Optional[str]) -> bool: ...
+    def has_changed(self, initial: Any, data: Any) -> bool: ...
     def get_bound_field(self, form: BaseForm, field_name: str) -> BoundField: ...
-    def __deepcopy__(self, memo: Dict[Any, Any]) -> Field: ...
 
 class CharField(Field):
-    disabled: bool
-    error_messages: Dict[str, str]
-    required: bool
-    show_hidden_initial: bool
     max_length: Optional[Union[int, str]] = ...
     min_length: Optional[Union[int, str]] = ...
     strip: bool = ...
     empty_value: Optional[str] = ...
     def __init__(
         self,
-        *,
         max_length: Optional[Any] = ...,
         min_length: Optional[Any] = ...,
         strip: bool = ...,
-        empty_value: str = ...,
-        **kwargs: Any
+        empty_value: Optional[str] = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
     ) -> None: ...
 
 class IntegerField(Field):
-    disabled: bool
-    error_messages: Dict[str, str]
     max_value: Optional[Any]
     min_value: Optional[Any]
-    required: bool
-    show_hidden_initial: bool
-    default_error_messages: Any = ...
     re_decimal: Any = ...
-    def __init__(self, *, max_value: Optional[Any] = ..., min_value: Optional[Any] = ..., **kwargs: Any) -> None: ...
+    def __init__(
+        self,
+        max_value: Optional[Any] = ...,
+        min_value: Optional[Any] = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
+    ) -> None: ...
 
 class FloatField(IntegerField):
-    disabled: bool
-    error_messages: Dict[str, str]
-    max_value: Optional[float]
-    min_value: Optional[float]
-    required: bool
-    show_hidden_initial: bool
-    default_error_messages: Any = ...
     def validate(self, value: Optional[float]) -> None: ...
 
 class DecimalField(IntegerField):
     decimal_places: Optional[int]
-    disabled: bool
-    error_messages: Dict[str, str]
     max_digits: Optional[int]
-    max_value: Optional[Union[decimal.Decimal, int]]
-    min_value: Optional[Union[decimal.Decimal, int]]
-    required: bool
-    show_hidden_initial: bool
-    default_error_messages: Any = ...
     def __init__(
         self,
         *,
@@ -110,118 +106,95 @@ class DecimalField(IntegerField):
         min_value: Optional[Any] = ...,
         max_digits: Optional[Any] = ...,
         decimal_places: Optional[Any] = ...,
-        **kwargs: Any
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
     ) -> None: ...
     def validate(self, value: Optional[Decimal]) -> None: ...
 
 class BaseTemporalField(Field):
     input_formats: Any = ...
-    def __init__(self, *, input_formats: Optional[Any] = ..., **kwargs: Any) -> None: ...
-    def strptime(self, value: Any, format: Any) -> Any: ...
+    def __init__(
+        self,
+        input_formats: Optional[Any] = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
+    ) -> None: ...
+    def strptime(self, value: Any, format: str) -> Any: ...
 
-class DateField(BaseTemporalField):
-    disabled: bool
-    error_messages: Dict[str, str]
-    required: bool
-    show_hidden_initial: bool
-    input_formats: Any = ...
-    default_error_messages: Any = ...
-    def strptime(self, value: str, format: str) -> date: ...
-
-class TimeField(BaseTemporalField):
-    disabled: bool
-    error_messages: Dict[str, str]
-    required: bool
-    show_hidden_initial: bool
-    input_formats: Any = ...
-    default_error_messages: Any = ...
-    def strptime(self, value: str, format: str) -> time: ...
-
-class DateTimeField(BaseTemporalField):
-    disabled: bool
-    error_messages: Dict[str, str]
-    required: bool
-    show_hidden_initial: bool
-    input_formats: Any = ...
-    default_error_messages: Any = ...
-    def prepare_value(self, value: Optional[datetime]) -> Optional[datetime]: ...
-    def strptime(self, value: str, format: str) -> datetime: ...
+class DateField(BaseTemporalField): ...
+class TimeField(BaseTemporalField): ...
+class DateTimeField(BaseTemporalField): ...
 
 class DurationField(Field):
-    disabled: bool
-    required: bool
-    show_hidden_initial: bool
-    default_error_messages: Any = ...
     def prepare_value(self, value: Optional[Union[timedelta, str]]) -> Optional[str]: ...
 
 class RegexField(CharField):
-    disabled: bool
-    empty_value: str
-    error_messages: Dict[str, str]
-    max_length: Optional[int]
-    min_length: Optional[int]
-    required: bool
-    show_hidden_initial: bool
-    strip: bool
-    def __init__(self, regex: str, **kwargs: Any) -> None: ...
-    regex: Any = ...
+    regex: str = ...
+    def __init__(
+        self,
+        regex: Union[str, Pattern],
+        max_length: Optional[Any] = ...,
+        min_length: Optional[Any] = ...,
+        strip: bool = ...,
+        empty_value: Optional[str] = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
+    ) -> None: ...
 
-class EmailField(CharField):
-    disabled: bool
-    empty_value: Optional[str]
-    error_messages: Dict[str, str]
-    max_length: Optional[int]
-    min_length: Optional[int]
-    required: bool
-    show_hidden_initial: bool
-    strip: bool
-    default_validators: Any = ...
-    def __init__(self, **kwargs: Any) -> None: ...
+class EmailField(CharField): ...
 
 class FileField(Field):
-    disabled: bool
-    required: bool
-    show_hidden_initial: bool
-    default_error_messages: Any = ...
     max_length: Optional[int] = ...
     allow_empty_file: bool = ...
-    def __init__(self, *, max_length: Optional[Any] = ..., allow_empty_file: bool = ..., **kwargs: Any) -> None: ...
-    def bound_data(self, data: Any, initial: Optional[FieldFile]) -> Optional[Union[File, str]]: ...
+    def __init__(
+        self,
+        max_length: Optional[Any] = ...,
+        allow_empty_file: bool = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
+    ) -> None: ...
+    def clean(self, data: Any, initial: Optional[Any] = ...): ...
 
-class ImageField(FileField):
-    allow_empty_file: bool
-    disabled: bool
-    max_length: Optional[int]
-    required: bool
-    show_hidden_initial: bool
-    default_validators: Any = ...
-    default_error_messages: Any = ...
-
-class URLField(CharField):
-    disabled: bool
-    empty_value: Optional[str]
-    error_messages: Dict[str, str]
-    max_length: Optional[int]
-    min_length: Optional[int]
-    required: bool
-    show_hidden_initial: bool
-    strip: bool
-    default_error_messages: Any = ...
-    default_validators: Any = ...
-    def __init__(self, **kwargs: Any) -> None: ...
-
-class BooleanField(Field):
-    disabled: bool
-    error_messages: Dict[str, str]
-    required: bool
-    show_hidden_initial: bool
-    def validate(self, value: bool) -> None: ...
-
-class NullBooleanField(BooleanField):
-    disabled: bool
-    required: bool
-    show_hidden_initial: bool
-    def validate(self, value: Optional[bool]) -> None: ...
+class ImageField(FileField): ...
+class URLField(CharField): ...
+class BooleanField(Field): ...
+class NullBooleanField(BooleanField): ...
 
 class CallableChoiceIterator:
     choices_func: Callable = ...
@@ -229,125 +202,191 @@ class CallableChoiceIterator:
     def __iter__(self) -> None: ...
 
 class ChoiceField(Field):
-    disabled: bool
-    error_messages: Dict[str, str]
-    required: bool
-    show_hidden_initial: bool
-    default_error_messages: Any = ...
     choices: Any = ...
-    def __init__(self, *, choices: Any = ..., **kwargs: Any) -> None: ...
-    def validate(self, value: Any) -> None: ...
+    def __init__(
+        self,
+        choices: Any = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
+    ) -> None: ...
     def valid_value(self, value: str) -> bool: ...
 
 class TypedChoiceField(ChoiceField):
-    disabled: bool
-    required: bool
-    show_hidden_initial: bool
-    coerce: Union[Callable, Type[Union[bool, float, str]]] = ...
+    coerce: Union[Callable, Type[Any]] = ...
     empty_value: Optional[str] = ...
-    def __init__(self, *, coerce: Any = ..., empty_value: str = ..., **kwargs: Any) -> None: ...
+    def __init__(
+        self,
+        coerce: Any = ...,
+        empty_value: Optional[str] = ...,
+        choices: Any = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
+    ) -> None: ...
 
-class MultipleChoiceField(ChoiceField):
-    disabled: bool
-    error_messages: Dict[str, str]
-    required: bool
-    show_hidden_initial: bool
-    hidden_widget: Any = ...
-    default_error_messages: Any = ...
-    def validate(self, value: List[str]) -> None: ...
+class MultipleChoiceField(ChoiceField): ...
 
 class TypedMultipleChoiceField(MultipleChoiceField):
-    disabled: bool
-    required: bool
-    show_hidden_initial: bool
     coerce: Union[Callable, Type[float]] = ...
     empty_value: Optional[List[Any]] = ...
-    def __init__(self, *, coerce: Any = ..., **kwargs: Any) -> None: ...
-    def validate(self, value: List[str]) -> None: ...
+    def __init__(
+        self,
+        coerce: Any = ...,
+        empty_value: Optional[str] = ...,
+        choices: Any = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
+    ) -> None: ...
 
 class ComboField(Field):
-    disabled: bool
-    required: bool
-    show_hidden_initial: bool
     fields: Any = ...
-    def __init__(self, fields: List[CharField], **kwargs: Any) -> None: ...
+    def __init__(
+        self,
+        fields: Sequence[Field],
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
+    ) -> None: ...
 
 class MultiValueField(Field):
-    disabled: bool
-    required: bool
-    show_hidden_initial: bool
-    default_error_messages: Any = ...
     require_all_fields: bool = ...
     fields: Any = ...
-    def __init__(self, fields: Tuple[Field, Field], *, require_all_fields: bool = ..., **kwargs: Any) -> None: ...
-    def validate(self, value: Union[datetime, str]) -> None: ...
+    def __init__(
+        self,
+        fields: Sequence[Field],
+        require_all_fields: bool = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
+    ) -> None: ...
     def compress(self, data_list: Any) -> Any: ...
 
 class FilePathField(ChoiceField):
     allow_files: bool
     allow_folders: bool
-    disabled: bool
     match: Optional[str]
     path: str
     recursive: bool
-    required: bool
-    show_hidden_initial: bool
-    choices: Any = ...
     match_re: Any = ...
     def __init__(
         self,
         path: str,
-        *,
         match: Optional[Any] = ...,
         recursive: bool = ...,
         allow_files: bool = ...,
         allow_folders: bool = ...,
-        **kwargs: Any
+        choices: Any = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
     ) -> None: ...
 
 class SplitDateTimeField(MultiValueField):
-    disabled: bool
-    require_all_fields: bool
-    required: bool
-    show_hidden_initial: bool
-    hidden_widget: Any = ...
-    default_error_messages: Any = ...
     def __init__(
-        self, *, input_date_formats: Optional[Any] = ..., input_time_formats: Optional[Any] = ..., **kwargs: Any
+        self,
+        input_date_formats: Optional[Any] = ...,
+        input_time_formats: Optional[Any] = ...,
+        fields: Sequence[Field] = ...,
+        require_all_fields: bool = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
     ) -> None: ...
     def compress(self, data_list: List[Optional[datetime]]) -> Optional[datetime]: ...
 
 class GenericIPAddressField(CharField):
-    disabled: bool
-    empty_value: str
-    error_messages: Dict[str, str]
-    max_length: None
-    min_length: None
-    required: bool
-    show_hidden_initial: bool
-    strip: bool
     unpack_ipv4: bool = ...
-    default_validators: List[Callable] = ...
-    def __init__(self, *, protocol: str = ..., unpack_ipv4: bool = ..., **kwargs: Any) -> None: ...
+    def __init__(
+        self,
+        protocol: str = ...,
+        unpack_ipv4: bool = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
+    ) -> None: ...
 
 class SlugField(CharField):
-    disabled: bool
-    empty_value: str
-    max_length: Optional[int]
-    min_length: None
-    required: bool
-    show_hidden_initial: bool
-    strip: bool
     allow_unicode: bool = ...
-    def __init__(self, *, allow_unicode: bool = ..., **kwargs: Any) -> None: ...
+    def __init__(
+        self,
+        allow_unicode: bool = ...,
+        required: bool = ...,
+        widget: Optional[Union[Widget, Type[Widget]]] = ...,
+        label: Optional[Any] = ...,
+        initial: Optional[Any] = ...,
+        help_text: str = ...,
+        error_messages: Optional[Any] = ...,
+        show_hidden_initial: bool = ...,
+        validators: Sequence[Any] = ...,
+        localize: bool = ...,
+        disabled: bool = ...,
+        label_suffix: Optional[Any] = ...,
+    ) -> None: ...
 
-class UUIDField(CharField):
-    disabled: bool
-    empty_value: str
-    max_length: None
-    min_length: None
-    required: bool
-    show_hidden_initial: bool
-    strip: bool
-    default_error_messages: Any = ...
-    def prepare_value(self, value: UUID) -> str: ...
+class UUIDField(CharField): ...
diff --git a/django-stubs/forms/forms.pyi b/django-stubs/forms/forms.pyi
index 6b18a13..f62448d 100644
--- a/django-stubs/forms/forms.pyi
+++ b/django-stubs/forms/forms.pyi
@@ -1,48 +1,45 @@
-from collections import OrderedDict
 from datetime import datetime
-from typing import Any, Dict, Iterator, List, Mapping, Optional, Tuple, Type, Union
+from typing import Any, Dict, Iterator, List, Mapping, Optional, Sequence, Type, Union
 
 from django.core.exceptions import ValidationError as ValidationError
-from django.core.files.base import File
 from django.core.files.uploadedfile import SimpleUploadedFile
 from django.db.models.query import QuerySet
 from django.forms.boundfield import BoundField
 from django.forms.fields import Field
+from django.forms.renderers import BaseRenderer
 from django.forms.utils import ErrorDict, ErrorList
 from django.forms.widgets import Media, MediaDefiningClass
 from django.utils.safestring import SafeText
 
 class DeclarativeFieldsMetaclass(MediaDefiningClass):
-    def __new__(
-        mcs: Type[DeclarativeFieldsMetaclass], name: str, bases: Tuple[Type[BaseForm]], attrs: OrderedDict
-    ) -> Type[BaseForm]: ...
+    def __new__(mcs, name: str, bases: Sequence[Type[BaseForm]], attrs: Dict[str, Any]) -> Type[BaseForm]: ...
 
 class BaseForm:
     default_renderer: Any = ...
     field_order: Any = ...
-    prefix: Any = ...
     use_required_attribute: bool = ...
-    is_bound: Any = ...
-    data: Any = ...
-    files: Any = ...
+    is_bound: bool = ...
+    data: Dict[str, Any] = ...
+    files: Optional[Dict[str, Any]] = ...
     auto_id: Any = ...
-    initial: Any = ...
-    error_class: Any = ...
-    label_suffix: Any = ...
-    empty_permitted: Any = ...
-    fields: Any = ...
-    renderer: Any = ...
+    initial: Dict[str, Any] = ...
+    error_class: Type[ErrorList] = ...
+    prefix: str = ...
+    label_suffix: str = ...
+    empty_permitted: bool = ...
+    fields: Dict[str, Any] = ...
+    renderer: BaseRenderer = ...
     def __init__(
         self,
         data: Optional[Mapping[str, Any]] = ...,
-        files: Optional[Mapping[str, File]] = ...,
+        files: Optional[Mapping[str, Any]] = ...,
         auto_id: Optional[Union[bool, str]] = ...,
         prefix: Optional[str] = ...,
         initial: Optional[Mapping[str, Any]] = ...,
         error_class: Type[ErrorList] = ...,
-        label_suffix: None = ...,
+        label_suffix: Optional[str] = ...,
         empty_permitted: bool = ...,
-        field_order: None = ...,
+        field_order: Optional[Any] = ...,
         use_required_attribute: Optional[bool] = ...,
         renderer: Any = ...,
     ) -> None: ...
diff --git a/django-stubs/forms/formsets.pyi b/django-stubs/forms/formsets.pyi
index 3a0e4ee..0d98d5d 100644
--- a/django-stubs/forms/formsets.pyi
+++ b/django-stubs/forms/formsets.pyi
@@ -1,8 +1,4 @@
-import collections
-from typing import Any, List, Optional, Union, Dict, Type
-
-from django.forms.renderers import BaseRenderer
-from django.forms.utils import ErrorList
+from typing import Any, Dict, Mapping, Optional, Sequence, Sized
 
 from django.forms import Form
 
@@ -17,21 +13,9 @@ DEFAULT_MIN_NUM: int = ...
 DEFAULT_MAX_NUM: int = ...
 
 class ManagementForm(Form):
-    auto_id: Union[bool, str]
     cleaned_data: Dict[str, Optional[int]]
-    data: Dict[str, Union[List[int], int, str]]
-    empty_permitted: bool
-    error_class: Type[ErrorList]
-    fields: collections.OrderedDict
-    files: Dict[Any, Any]
-    initial: Dict[str, int]
-    is_bound: bool
-    label_suffix: str
-    prefix: str
-    renderer: BaseRenderer
-    def __init__(self, *args: Any, **kwargs: Any) -> None: ...
 
-class BaseFormSet:
+class BaseFormSet(Sized, Mapping[str, Any]):
     is_bound: Any = ...
     prefix: Any = ...
     auto_id: Any = ...
@@ -101,4 +85,4 @@ def formset_factory(
     min_num: Optional[Any] = ...,
     validate_min: bool = ...,
 ): ...
-def all_valid(formsets: List[Any]) -> bool: ...
+def all_valid(formsets: Sequence[Any]) -> bool: ...
diff --git a/django-stubs/forms/models.pyi b/django-stubs/forms/models.pyi
index 572d40b..213ca9f 100644
--- a/django-stubs/forms/models.pyi
+++ b/django-stubs/forms/models.pyi
@@ -1,10 +1,12 @@
 from collections import OrderedDict
 from datetime import date, datetime
-from typing import Any, Callable, Dict, Iterator, List, Optional, Tuple, Type, Union, Sequence
+from typing import Any, Callable, Dict, Iterator, List, Optional, Tuple, Type, Union, Sequence, MutableMapping
 from unittest.mock import MagicMock
 from uuid import UUID
 
+from django.core.files.base import File
 from django.core.files.uploadedfile import SimpleUploadedFile
+from django.db import models
 from django.db.models import ForeignKey
 from django.db.models.base import Model
 from django.db.models.manager import Manager
@@ -17,6 +19,7 @@ from django.forms.utils import ErrorList
 from django.forms.widgets import Input, Widget, Select
 from django.http.request import QueryDict
 from django.utils.datastructures import MultiValueDict
+from typing_extensions import Literal
 
 ALL_FIELDS: str
 
@@ -57,21 +60,19 @@ class ModelFormOptions:
     def __init__(self, options: Optional[type] = ...) -> None: ...
 
 class ModelFormMetaclass(DeclarativeFieldsMetaclass):
-    def __new__(
-        mcs: Type[ModelFormMetaclass], name: str, bases: Tuple[Type[ModelForm]], attrs: OrderedDict
-    ) -> Type[ModelForm]: ...
+    def __new__(mcs, name: str, bases: Sequence[Type[ModelForm]], attrs: Dict[str, Any]) -> Type[ModelForm]: ...
 
 class BaseModelForm(BaseForm):
     instance: Any = ...
     def __init__(
         self,
-        data: Optional[Union[Dict[str, Any], QueryDict]] = ...,
-        files: Optional[Union[Dict[str, SimpleUploadedFile], MultiValueDict]] = ...,
+        data: Optional[Dict[str, Any]] = ...,
+        files: Optional[Dict[str, File]] = ...,
         auto_id: Union[bool, str] = ...,
-        prefix: None = ...,
-        initial: Optional[Union[Dict[str, List[int]], Dict[str, int]]] = ...,
+        prefix: Optional[str] = ...,
+        initial: Optional[Dict[str, Any]] = ...,
         error_class: Type[ErrorList] = ...,
-        label_suffix: None = ...,
+        label_suffix: Optional[str] = ...,
         empty_permitted: bool = ...,
         instance: Optional[Model] = ...,
         use_required_attribute: None = ...,
@@ -87,16 +88,16 @@ class ModelForm(BaseModelForm): ...
 def modelform_factory(
     model: Type[Model],
     form: Type[ModelForm] = ...,
-    fields: Optional[Union[List[str], str]] = ...,
-    exclude: None = ...,
-    formfield_callback: Optional[str] = ...,
-    widgets: None = ...,
-    localized_fields: None = ...,
-    labels: None = ...,
-    help_texts: None = ...,
-    error_messages: None = ...,
-    field_classes: None = ...,
-) -> Any: ...
+    fields: Optional[Union[Sequence[str], Literal["__all__"]]] = ...,
+    exclude: Optional[Sequence[str]] = ...,
+    formfield_callback: Optional[Union[str, Callable[[models.Field], Field]]] = ...,
+    widgets: Optional[MutableMapping[str, Widget]] = ...,
+    localized_fields: Optional[Sequence[str]] = ...,
+    labels: Optional[MutableMapping[str, str]] = ...,
+    help_texts: Optional[MutableMapping[str, str]] = ...,
+    error_messages: Optional[MutableMapping[str, Dict[str, Any]]] = ...,
+    field_classes: Optional[MutableMapping[str, Type[Field]]] = ...,
+) -> ModelForm: ...
 
 class BaseModelFormSet(BaseFormSet):
     model: Any = ...
@@ -148,13 +149,13 @@ def modelformset_factory(
     exclude: Optional[Sequence[str]] = ...,
     widgets: Optional[Dict[str, Any]] = ...,
     validate_max: bool = ...,
-    localized_fields: None = ...,
+    localized_fields: Optional[Sequence[str]] = ...,
     labels: Optional[Dict[str, str]] = ...,
     help_texts: Optional[Dict[str, str]] = ...,
     error_messages: Optional[Dict[str, Dict[str, str]]] = ...,
     validate_min: bool = ...,
-    field_classes: Optional[Dict[str, Any]] = ...,
-) -> Any: ...
+    field_classes: Optional[Dict[str, Type[Field]]] = ...,
+) -> BaseModelFormSet: ...
 
 class BaseInlineFormSet(BaseModelFormSet):
     instance: Any = ...
@@ -192,7 +193,7 @@ def inlineformset_factory(
     formfield_callback: Optional[Callable] = ...,
     widgets: Optional[Dict[str, Any]] = ...,
     validate_max: bool = ...,
-    localized_fields: None = ...,
+    localized_fields: Optional[Sequence[str]] = ...,
     labels: Optional[Dict[str, str]] = ...,
     help_texts: Optional[Dict[str, str]] = ...,
     error_messages: Optional[Dict[str, Dict[str, str]]] = ...,
diff --git a/django-stubs/forms/utils.pyi b/django-stubs/forms/utils.pyi
index 31ea3cc..f48d4f5 100644
--- a/django-stubs/forms/utils.pyi
+++ b/django-stubs/forms/utils.pyi
@@ -6,11 +6,11 @@ from django.core.exceptions import ValidationError
 from django.utils.safestring import SafeText
 
 def pretty_name(name: str) -> str: ...
-def flatatt(attrs: Dict[str, Optional[str]]) -> SafeText: ...
+def flatatt(attrs: Dict[str, Any]) -> SafeText: ...
 
 class ErrorDict(dict):
     def as_data(self) -> Dict[str, List[ValidationError]]: ...
-    def get_json_data(self, escape_html: bool = ...) -> Dict[str, List[Dict[str, str]]]: ...
+    def get_json_data(self, escape_html: bool = ...) -> Dict[str, Any]: ...
     def as_json(self, escape_html: bool = ...) -> str: ...
     def as_ul(self) -> str: ...
     def as_text(self) -> str: ...
@@ -19,7 +19,9 @@ class ErrorList(UserList):
     data: List[Union[ValidationError, str]]
     error_class: str = ...
     def __init__(
-        self, initlist: Optional[Union[ErrorList, Sequence[str]]] = ..., error_class: Optional[str] = ...
+        self,
+        initlist: Optional[Union[ErrorList, Sequence[Union[str, Exception]]]] = ...,
+        error_class: Optional[str] = ...,
     ) -> None: ...
     def as_data(self) -> List[ValidationError]: ...
     def get_json_data(self, escape_html: bool = ...) -> List[Dict[str, str]]: ...
diff --git a/django-stubs/forms/widgets.pyi b/django-stubs/forms/widgets.pyi
index b4a7482..b929aa3 100644
--- a/django-stubs/forms/widgets.pyi
+++ b/django-stubs/forms/widgets.pyi
@@ -1,17 +1,16 @@
 from datetime import time
 from decimal import Decimal
 from itertools import chain
-from typing import Any, Callable, Dict, Iterator, List, Optional, Set, Tuple, Type, Union, Iterable, Sequence
+from typing import Any, Callable, Dict, Iterable, Iterator, List, Optional, Sequence, Set, Tuple, Type, Union
 
-from django.contrib.admin.options import BaseModelAdmin
 from django.core.files.base import File
-from django.core.files.uploadedfile import SimpleUploadedFile
 from django.db.models.fields.files import FieldFile
-from django.forms.forms import BaseForm
 from django.forms.renderers import EngineMixin
 from django.utils.datastructures import MultiValueDict
 from django.utils.safestring import SafeText
 
+_OptAttrs = Dict[str, str]
+
 class MediaOrderConflictWarning(RuntimeWarning): ...
 
 class Media:
@@ -32,9 +31,7 @@ class Media:
     def __add__(self, other: Media) -> Media: ...
 
 class MediaDefiningClass(type):
-    def __new__(
-        mcs: Type[MediaDefiningClass], name: str, bases: Tuple, attrs: Any
-    ) -> Type[Union[BaseModelAdmin, BaseForm, Widget]]: ...
+    def __new__(mcs, name: str, bases: Sequence[Any], attrs: Dict[str, Any]) -> type: ...
 
 class Widget:
     needs_multipart_form: bool = ...
@@ -61,10 +58,10 @@ class Widget:
         self, base_attrs: Dict[str, Union[float, str]], extra_attrs: Optional[Dict[str, Union[bool, str]]] = ...
     ) -> Dict[str, Union[Decimal, float, str]]: ...
     def value_from_datadict(
-        self, data: dict, files: Union[Dict[str, SimpleUploadedFile], MultiValueDict], name: str
+        self, data: dict, files: Union[Dict[str, Iterable[Any]], MultiValueDict], name: str
     ) -> Any: ...
     def value_omitted_from_data(
-        self, data: Dict[str, Any], files: Union[Dict[str, SimpleUploadedFile], MultiValueDict], name: str
+        self, data: Dict[str, Any], files: Union[Dict[str, Iterable[Any]], MultiValueDict], name: str
     ) -> bool: ...
     def id_for_label(self, id_: str) -> str: ...
     def use_required_attribute(self, initial: Any) -> bool: ...
@@ -80,6 +77,7 @@ class URLInput(Input): ...
 
 class PasswordInput(Input):
     render_value: bool = ...
+    def __init__(self, attrs: Optional[_OptAttrs] = ..., render_value: bool = ...): ...
 
 class HiddenInput(Input):
     choices: Iterable[Tuple[str, str]]
@@ -105,6 +103,7 @@ class DateTimeBaseInput(TextInput):
     format_key: str = ...
     supports_microseconds: bool = ...
     format: Optional[str] = ...
+    def __init__(self, attrs: Optional[_OptAttrs] = ..., format: Optional[str] = ...): ...
 
 class DateInput(DateTimeBaseInput): ...
 class DateTimeInput(DateTimeBaseInput): ...
@@ -112,9 +111,7 @@ class TimeInput(DateTimeBaseInput): ...
 
 class CheckboxInput(Input):
     check_test: Callable = ...
-    def __init__(self, attrs: Optional[Dict[str, str]] = ..., check_test: Optional[Callable] = ...) -> None: ...
-
-_OptAttrs = Dict[str, Any]
+    def __init__(self, attrs: Optional[_OptAttrs] = ..., check_test: Optional[Callable] = ...) -> None: ...
 
 class ChoiceWidget(Widget):
     allow_multiple_selected: bool = ...
@@ -165,7 +162,7 @@ class CheckboxSelectMultiple(ChoiceWidget):
 class MultiWidget(Widget):
     template_name: str = ...
     widgets: List[Widget] = ...
-    def __init__(self, widgets: Sequence[Widget], attrs: Optional[_OptAttrs] = ...) -> None: ...
+    def __init__(self, widgets: Sequence[Union[Widget, Type[Widget]]], attrs: Optional[_OptAttrs] = ...) -> None: ...
     @property
     def is_hidden(self) -> bool: ...
     def decompress(self, value: Any) -> Optional[Any]: ...
@@ -209,7 +206,7 @@ class SelectDateWidget(Widget):
     def __init__(
         self,
         attrs: Optional[_OptAttrs] = ...,
-        years: Optional[Union[Tuple[Union[int, str]], range]] = ...,
-        months: None = ...,
-        empty_label: Optional[Union[Tuple[str, str], str]] = ...,
+        years: Optional[Iterable[Union[int, str]]] = ...,
+        months: Optional[Dict[int, str]] = ...,
+        empty_label: Optional[Union[str, Sequence[str]]] = ...,
     ) -> None: ...
diff --git a/django-stubs/views/generic/edit.pyi b/django-stubs/views/generic/edit.pyi
index f4325bd..d87c893 100644
--- a/django-stubs/views/generic/edit.pyi
+++ b/django-stubs/views/generic/edit.pyi
@@ -1,5 +1,6 @@
 from typing import Any, Callable, Dict, Optional, Sequence, Type, Union
 
+from django.forms.forms import BaseForm
 from django.views.generic.base import ContextMixin, TemplateResponseMixin, View
 from django.views.generic.detail import BaseDetailView, SingleObjectMixin, SingleObjectTemplateResponseMixin
 from typing_extensions import Literal
@@ -10,7 +11,7 @@ from django.http import HttpRequest, HttpResponse
 
 class FormMixin(ContextMixin):
     initial: Dict[str, Any] = ...
-    form_class: Optional[Type[Form]] = ...
+    form_class: Optional[Type[BaseForm]] = ...
     success_url: Optional[Union[str, Callable[..., Any]]] = ...
     prefix: Optional[str] = ...
     request: HttpRequest = ...
diff --git a/scripts/typecheck_tests.py b/scripts/typecheck_tests.py
index 6369b65..8d838e8 100644
--- a/scripts/typecheck_tests.py
+++ b/scripts/typecheck_tests.py
@@ -32,7 +32,7 @@ IGNORED_ERRORS = {
         'Cannot assign to a type',
         re.compile(r'Cannot assign to class variable "[a-z_]+" via instance'),
         # forms <-> models plugin support
-        '"Model" has no attribute',
+        # '"Model" has no attribute',
         re.compile(r'Cannot determine type of \'(objects|stuff)\''),
         # settings
         re.compile(r'Module has no attribute "[A-Z_]+"'),
@@ -54,7 +54,8 @@ IGNORED_ERRORS = {
         'ValuesIterable',
         'Value of type "Optional[Dict[str, Any]]" is not indexable',
         'Argument 1 to "len" has incompatible type "Optional[List[_Record]]"; expected "Sized"',
-        'Argument 1 to "loads" has incompatible type "Union[bytes, str, None]"; expected "Union[str, bytes, bytearray]"'
+        'Argument 1 to "loads" has incompatible type "Union[bytes, str, None]"; expected "Union[str, bytes, bytearray]"',
+        'Incompatible types in assignment (expression has type "None", variable has type Module)'
     ],
     'admin_changelist': [
         'Incompatible types in assignment (expression has type "FilteredChildAdmin", variable has type "ChildAdmin")'
@@ -166,6 +167,29 @@ IGNORED_ERRORS = {
     'fixtures': [
         'Incompatible types in assignment (expression has type "int", target has type "Iterable[str]")'
     ],
+    'forms_tests': [
+        'List item 0 has incompatible type "Jinja2"; expected "DjangoTemplates"',
+        'Not enough arguments for format string',
+        'Argument after ** must be a mapping, not "object"',
+        '"media" undefined in superclass',
+        'expression has type "None", base class "TestFormParent"',
+        'variable has type "SongForm"',
+        '"full_clean" of "BaseForm" does not return a value',
+        'No overload variant of "zip" matches argument types "Tuple[str, str, str]", "object"',
+        'note:',
+        'Incompatible types in assignment (expression has type "GetDateShowHiddenInitial", variable has type "GetDate")',
+        re.compile(r'Incompatible types in assignment \(expression has type "[a-zA-Z]+Field", '
+                   r'base class "BaseForm" defined the type as "Dict\[str, Any\]"\)'),
+        'List or tuple expected as variable arguments',
+        'Argument 1 to "__init__" of "MultiWidget" has incompatible type "List[object]"; '
+        + 'expected "Sequence[Union[Widget, Type[Widget]]]"',
+        'Argument 1 to "issubclass" has incompatible type "ModelFormMetaclass"; expected "type"',
+        'Incompatible types in assignment (expression has type "List[str]", target has type "str")',
+        'Incompatible types in assignment (expression has type "TestForm", variable has type "Person")',
+        'Incompatible types in assignment (expression has type "Type[Textarea]", '
+        + 'base class "Field" defined the type as "Widget")',
+        'Incompatible types in assignment (expression has type "SimpleUploadedFile", variable has type "BinaryIO")'
+    ],
     'get_object_or_404': [
         'Argument 1 to "get_object_or_404" has incompatible type "str"; '
         + 'expected "Union[Type[<nothing>], Manager[<nothing>], QuerySet[<nothing>]]"',
@@ -330,7 +354,6 @@ IGNORED_ERRORS = {
     'template_backends': [
         'Incompatible import of "Jinja2" (imported name has type "Type[Jinja2]", local name has type "object")',
         'TemplateStringsTests',
-        'Incompatible types in assignment (expression has type "None", variable has type Module)'
     ],
     'urlpatterns': [
         '"object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable)',
@@ -440,7 +463,7 @@ TESTS_DIRS = [
     'flatpages_tests',
     'force_insert_update',
     'foreign_object',
-    # TODO: 'forms_tests',
+    'forms_tests',
     'from_db_value',
     'generic_inline_admin',
     'generic_relations',