diff --git a/.github/workflows/build-docs.yml b/.github/workflows/build-docs.yml
index a0b507dd90..ea18fc0109 100644
--- a/.github/workflows/build-docs.yml
+++ b/.github/workflows/build-docs.yml
@@ -20,7 +20,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     # For pull requests it's not necessary to checkout the code but for the main branch it is
-    - uses: dorny/paths-filter@v3
+    - uses: dorny/paths-filter@v4
       id: filter
       with:
         filters: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5b139f1d12..2e39633a0c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -28,7 +28,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     # For pull requests it's not necessary to checkout the code but for the main branch it is
-    - uses: dorny/paths-filter@v3
+    - uses: dorny/paths-filter@v4
       id: filter
       with:
         filters: |
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 64b84bfbd2..21c8bea6cd 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -37,6 +37,13 @@ repos:
         language: unsupported
         pass_filenames: false
 
+      - id: local-ty
+        name: ty check
+        entry: uv run ty check fastapi
+        require_serial: true
+        language: unsupported
+        pass_filenames: false
+
       - id: add-permalinks-pages
         language: unsupported
         name: add-permalinks-pages
diff --git a/docs/en/docs/release-notes.md b/docs/en/docs/release-notes.md
index 1e60539979..047090ff8f 100644
--- a/docs/en/docs/release-notes.md
+++ b/docs/en/docs/release-notes.md
@@ -19,6 +19,10 @@ hide:
 
 ### Internal
 
+* 👷 Add `ty` to precommit. PR [#15091](https://github.com/fastapi/fastapi/pull/15091) by [@svlandeg](https://github.com/svlandeg).
+* ⬆ Bump dorny/paths-filter from 3 to 4. PR [#15106](https://github.com/fastapi/fastapi/pull/15106) by [@dependabot[bot]](https://github.com/apps/dependabot).
+* ⬆ Bump cairosvg from 2.8.2 to 2.9.0. PR [#15108](https://github.com/fastapi/fastapi/pull/15108) by [@dependabot[bot]](https://github.com/apps/dependabot).
+* ⬆ Bump pyjwt from 2.11.0 to 2.12.0. PR [#15110](https://github.com/fastapi/fastapi/pull/15110) by [@dependabot[bot]](https://github.com/apps/dependabot).
 * ⬆ Bump black from 26.1.0 to 26.3.1. PR [#15100](https://github.com/fastapi/fastapi/pull/15100) by [@dependabot[bot]](https://github.com/apps/dependabot).
 * 🔨 Update script to autofix permalinks to account for headers with Markdown links. PR [#15062](https://github.com/fastapi/fastapi/pull/15062) by [@tiangolo](https://github.com/tiangolo).
 * 📌 Pin Click for MkDocs live reload. PR [#15057](https://github.com/fastapi/fastapi/pull/15057) by [@tiangolo](https://github.com/tiangolo).
diff --git a/fastapi/_compat/__init__.py b/fastapi/_compat/__init__.py
index a0bede3471..42a4aca628 100644
--- a/fastapi/_compat/__init__.py
+++ b/fastapi/_compat/__init__.py
@@ -27,7 +27,7 @@ from .v2 import Undefined as Undefined
 from .v2 import Url as Url
 from .v2 import copy_field_info as copy_field_info
 from .v2 import create_body_model as create_body_model
-from .v2 import evaluate_forwardref as evaluate_forwardref
+from .v2 import evaluate_forwardref as evaluate_forwardref  # ty: ignore[deprecated]
 from .v2 import get_cached_model_fields as get_cached_model_fields
 from .v2 import get_definitions as get_definitions
 from .v2 import get_flat_models_from_fields as get_flat_models_from_fields
diff --git a/fastapi/_compat/v2.py b/fastapi/_compat/v2.py
index 0a83934752..8587393ea4 100644
--- a/fastapi/_compat/v2.py
+++ b/fastapi/_compat/v2.py
@@ -166,7 +166,7 @@ class ModelField:
                 Field(**field_dict["attributes"]),
             )
             self._type_adapter: TypeAdapter[Any] = TypeAdapter(
-                Annotated[annotated_args],
+                Annotated[annotated_args],  # ty: ignore[invalid-type-form]
                 config=self.config,
             )
 
@@ -456,7 +456,7 @@ def get_flat_models_from_annotation(
         for arg in get_args(annotation):
             if lenient_issubclass(arg, (BaseModel, Enum)):
                 if arg not in known_models:
-                    known_models.add(arg)  # type: ignore[arg-type]
+                    known_models.add(arg)  # type: ignore[arg-type]  # ty: ignore[unused-ignore-comment]
                     if lenient_issubclass(arg, BaseModel):
                         get_flat_models_from_model(arg, known_models=known_models)
             else:
diff --git a/fastapi/applications.py b/fastapi/applications.py
index e7e816c2e9..4af1146b0d 100644
--- a/fastapi/applications.py
+++ b/fastapi/applications.py
@@ -1,10 +1,6 @@
 from collections.abc import Awaitable, Callable, Coroutine, Sequence
 from enum import Enum
-from typing import (
-    Annotated,
-    Any,
-    TypeVar,
-)
+from typing import Annotated, Any, TypeVar
 
 from annotated_doc import Doc
 from fastapi import routing
@@ -1006,11 +1002,12 @@ class FastAPI(Starlette):
         self.exception_handlers.setdefault(
             RequestValidationError, request_validation_exception_handler
         )
+
+        # Starlette still has incorrect type specification for the handlers
         self.exception_handlers.setdefault(
             WebSocketRequestValidationError,
-            # Starlette still has incorrect type specification for the handlers
-            websocket_request_validation_exception_handler,  # type: ignore
-        )
+            websocket_request_validation_exception_handler,  # type: ignore[arg-type]  # ty: ignore[unused-ignore-comment]
+        )  # ty: ignore[no-matching-overload]
 
         self.user_middleware: list[Middleware] = (
             [] if middleware is None else list(middleware)
@@ -1032,11 +1029,13 @@ class FastAPI(Starlette):
                 exception_handlers[key] = value
 
         middleware = (
-            [Middleware(ServerErrorMiddleware, handler=error_handler, debug=debug)]
+            [Middleware(ServerErrorMiddleware, handler=error_handler, debug=debug)]  # ty: ignore[invalid-argument-type]
             + self.user_middleware
             + [
                 Middleware(
-                    ExceptionMiddleware, handlers=exception_handlers, debug=debug
+                    ExceptionMiddleware,  # ty: ignore[invalid-argument-type]
+                    handlers=exception_handlers,
+                    debug=debug,
                 ),
                 # Add FastAPI-specific AsyncExitStackMiddleware for closing files.
                 # Before this was also used for closing dependencies with yield but
@@ -1057,7 +1056,7 @@ class FastAPI(Starlette):
                 # user middlewares, the same context is used.
                 # This is currently not needed, only for closing files, but used to be
                 # important when dependencies with yield were closed here.
-                Middleware(AsyncExitStackMiddleware),
+                Middleware(AsyncExitStackMiddleware),  # ty: ignore[invalid-argument-type]
             ]
         )
 
@@ -4596,7 +4595,7 @@ class FastAPI(Starlette):
         Read more about it in the
         [FastAPI docs for Lifespan Events](https://fastapi.tiangolo.com/advanced/events/#alternative-events-deprecated).
         """
-        return self.router.on_event(event_type)
+        return self.router.on_event(event_type)  # ty: ignore[deprecated]
 
     def middleware(
         self,
@@ -4639,7 +4638,7 @@ class FastAPI(Starlette):
         """
 
         def decorator(func: DecoratedCallable) -> DecoratedCallable:
-            self.add_middleware(BaseHTTPMiddleware, dispatch=func)
+            self.add_middleware(BaseHTTPMiddleware, dispatch=func)  # ty: ignore[invalid-argument-type]
             return func
 
         return decorator
diff --git a/fastapi/cli.py b/fastapi/cli.py
index 8d3301e9da..fda271a53a 100644
--- a/fastapi/cli.py
+++ b/fastapi/cli.py
@@ -6,7 +6,7 @@ except ImportError:  # pragma: no cover
 
 
 def main() -> None:
-    if not cli_main:  # type: ignore[truthy-function]
+    if not cli_main:  # type: ignore[truthy-function]  # ty: ignore[unused-ignore-comment]
         message = 'To use the fastapi command, please install "fastapi[standard]":\n\n\tpip install "fastapi[standard]"\n'
         print(message)
         raise RuntimeError(message)  # noqa: B904
diff --git a/fastapi/datastructures.py b/fastapi/datastructures.py
index 479e1a7c3b..1da784cf09 100644
--- a/fastapi/datastructures.py
+++ b/fastapi/datastructures.py
@@ -179,3 +179,8 @@ def Default(value: DefaultType) -> DefaultType:
     if the overridden default value was truthy.
     """
     return DefaultPlaceholder(value)  # type: ignore
+
+
+# Sentinel for "parameter not provided" in Param/FieldInfo.
+# Typed as None to satisfy ty
+_Unset = Default(None)
diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index 8fcf1a5b3c..6b14dac8dc 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -33,7 +33,7 @@ from fastapi._compat import (
     Undefined,
     copy_field_info,
     create_body_model,
-    evaluate_forwardref,
+    evaluate_forwardref,  # ty: ignore[deprecated]
     field_annotation_is_scalar,
     field_annotation_is_scalar_sequence,
     field_annotation_is_sequence,
@@ -100,12 +100,14 @@ def ensure_multipart_is_installed() -> None:
     except (ImportError, AssertionError):
         try:
             # __version__ is available in both multiparts, and can be mocked
-            from multipart import __version__  # type: ignore[no-redef,import-untyped]
+            from multipart import (  # type: ignore[no-redef,import-untyped]  # ty: ignore[unused-ignore-comment]
+                __version__,
+            )
 
             assert __version__
             try:
                 # parse_options_header is only available in the right multipart
-                from multipart.multipart import (  # type: ignore[import-untyped]
+                from multipart.multipart import (  # type: ignore[import-untyped]  # ty: ignore[unused-ignore-comment]
                     parse_options_header,
                 )
 
@@ -243,7 +245,7 @@ def get_typed_signature(call: Callable[..., Any]) -> inspect.Signature:
 def get_typed_annotation(annotation: Any, globalns: dict[str, Any]) -> Any:
     if isinstance(annotation, str):
         annotation = ForwardRef(annotation)
-        annotation = evaluate_forwardref(annotation, globalns, globalns)
+        annotation = evaluate_forwardref(annotation, globalns, globalns)  # ty: ignore[deprecated]
         if annotation is type(None):
             return None
     return annotation
@@ -320,8 +322,9 @@ def get_dependant(
                 and param_details.depends.scope == "function"
             ):
                 assert dependant.call
+                call_name = getattr(dependant.call, "__name__", "<unnamed_callable>")
                 raise DependencyScopeError(
-                    f'The dependency "{dependant.call.__name__}" has a scope of '
+                    f'The dependency "{call_name}" has a scope of '
                     '"request", it cannot depend on dependencies with scope "function".'
                 )
             sub_own_oauth_scopes: list[str] = []
@@ -596,7 +599,7 @@ async def solve_dependencies(
     *,
     request: Request | WebSocket,
     dependant: Dependant,
-    body: dict[str, Any] | FormData | None = None,
+    body: dict[str, Any] | FormData | bytes | None = None,
     background_tasks: StarletteBackgroundTasks | None = None,
     response: Response | None = None,
     dependency_overrides_provider: Any | None = None,
@@ -619,7 +622,7 @@ async def solve_dependencies(
     if response is None:
         response = Response()
         del response.headers["content-length"]
-        response.status_code = None  # type: ignore
+        response.status_code = None  # type: ignore  # ty: ignore[unused-ignore-comment]
     if dependency_cache is None:
         dependency_cache = {}
     for sub_dependant in dependant.dependencies:
@@ -826,7 +829,7 @@ def request_params_to_args(
 
     for key in received_params.keys():
         if key not in processed_keys:
-            if hasattr(received_params, "getlist"):
+            if isinstance(received_params, (ImmutableMultiDict, Headers)):
                 value = received_params.getlist(key)
                 if isinstance(value, list) and (len(value) == 1):
                     params_to_process[key] = value[0]
@@ -947,7 +950,7 @@ async def _extract_form_body(
 
 async def request_body_to_args(
     body_fields: list[ModelField],
-    received_body: dict[str, Any] | FormData | None,
+    received_body: dict[str, Any] | FormData | bytes | None,
     embed_body_fields: bool,
 ) -> tuple[dict[str, Any], list[dict[str, Any]]]:
     values: dict[str, Any] = {}
@@ -978,7 +981,7 @@ async def request_body_to_args(
     for field in body_fields:
         loc = ("body", get_validation_alias(field))
         value: Any | None = None
-        if body_to_process is not None:
+        if body_to_process is not None and not isinstance(body_to_process, bytes):
             try:
                 value = body_to_process.get(get_validation_alias(field))
             # If the received body is a list, not a dict
diff --git a/fastapi/encoders.py b/fastapi/encoders.py
index 863b5d4531..7c46072041 100644
--- a/fastapi/encoders.py
+++ b/fastapi/encoders.py
@@ -67,7 +67,7 @@ def decimal_encoder(dec_value: Decimal) -> int | float:
 
 ENCODERS_BY_TYPE: dict[type[Any], Callable[[Any], Any]] = {
     bytes: lambda o: o.decode(),
-    Color: str,
+    Color: str,  # ty: ignore[deprecated]
     datetime.date: isoformat,
     datetime.datetime: isoformat,
     datetime.time: isoformat,
@@ -220,9 +220,9 @@ def jsonable_encoder(
                 if isinstance(obj, encoder_type):
                     return encoder_instance(obj)
     if include is not None and not isinstance(include, (set, dict)):
-        include = set(include)  # type: ignore[assignment]
+        include = set(include)  # type: ignore[assignment]  # ty: ignore[unused-ignore-comment]
     if exclude is not None and not isinstance(exclude, (set, dict)):
-        exclude = set(exclude)  # type: ignore[assignment]
+        exclude = set(exclude)  # type: ignore[assignment]  # ty: ignore[unused-ignore-comment]
     if isinstance(obj, BaseModel):
         obj_dict = obj.model_dump(
             mode="json",
diff --git a/fastapi/openapi/models.py b/fastapi/openapi/models.py
index d7950241fc..b9fad31a70 100644
--- a/fastapi/openapi/models.py
+++ b/fastapi/openapi/models.py
@@ -20,7 +20,7 @@ try:
     from pydantic import EmailStr
 except ImportError:  # pragma: no cover
 
-    class EmailStr(str):  # type: ignore
+    class EmailStr(str):  # type: ignore  # ty: ignore[unused-ignore-comment]
         @classmethod
         def __get_validators__(cls) -> Iterable[Callable[..., Any]]:
             yield cls.validate
diff --git a/fastapi/openapi/utils.py b/fastapi/openapi/utils.py
index 828442559b..8f1852b0cc 100644
--- a/fastapi/openapi/utils.py
+++ b/fastapi/openapi/utils.py
@@ -8,14 +8,13 @@ from typing import Any, Literal, cast
 from fastapi import routing
 from fastapi._compat import (
     ModelField,
-    Undefined,
     get_definitions,
     get_flat_models_from_fields,
     get_model_name_map,
     get_schema_from_model_field,
     lenient_issubclass,
 )
-from fastapi.datastructures import DefaultPlaceholder
+from fastapi.datastructures import DefaultPlaceholder, _Unset
 from fastapi.dependencies.models import Dependant
 from fastapi.dependencies.utils import (
     _get_flat_fields_from_params,
@@ -170,7 +169,7 @@ def _get_openapi_operation_parameters(
             example = getattr(field_info, "example", None)
             if openapi_examples:
                 parameter["examples"] = jsonable_encoder(openapi_examples)
-            elif example != Undefined:
+            elif example is not _Unset:
                 parameter["example"] = jsonable_encoder(example)
             if getattr(field_info, "deprecated", None):
                 parameter["deprecated"] = True
@@ -207,7 +206,7 @@ def get_openapi_operation_request_body(
         request_media_content["examples"] = jsonable_encoder(
             field_info.openapi_examples
         )
-    elif field_info.example != Undefined:
+    elif field_info.example is not _Unset:
         request_media_content["example"] = jsonable_encoder(field_info.example)
     request_body_oai["content"] = {request_media_type: request_media_content}
     return request_body_oai
@@ -245,10 +244,8 @@ def get_openapi_operation_metadata(
         operation["description"] = route.description
     operation_id = route.operation_id or route.unique_id
     if operation_id in operation_ids:
-        message = (
-            f"Duplicate Operation ID {operation_id} for function "
-            + f"{route.endpoint.__name__}"
-        )
+        endpoint_name = getattr(route.endpoint, "__name__", "<unnamed_endpoint>")
+        message = f"Duplicate Operation ID {operation_id} for function {endpoint_name}"
         file_name = getattr(route.endpoint, "__globals__", {}).get("__file__")
         if file_name:
             message += f" at {file_name}"
@@ -606,4 +603,4 @@ def get_openapi(
         output["tags"] = tags
     if external_docs:
         output["externalDocs"] = external_docs
-    return jsonable_encoder(OpenAPI(**output), by_alias=True, exclude_none=True)  # type: ignore
+    return jsonable_encoder(OpenAPI(**output), by_alias=True, exclude_none=True)  # type: ignore  # ty: ignore[unused-ignore-comment]
diff --git a/fastapi/param_functions.py b/fastapi/param_functions.py
index d3edde2682..1856178fcb 100644
--- a/fastapi/param_functions.py
+++ b/fastapi/param_functions.py
@@ -4,12 +4,11 @@ from typing import Annotated, Any, Literal
 from annotated_doc import Doc
 from fastapi import params
 from fastapi._compat import Undefined
+from fastapi.datastructures import _Unset
 from fastapi.openapi.models import Example
 from pydantic import AliasChoices, AliasPath
 from typing_extensions import deprecated
 
-_Unset: Any = Undefined
-
 
 def Path(  # noqa: N802
     default: Annotated[
diff --git a/fastapi/params.py b/fastapi/params.py
index 68f9870810..e8f2eb290d 100644
--- a/fastapi/params.py
+++ b/fastapi/params.py
@@ -13,8 +13,7 @@ from typing_extensions import deprecated
 from ._compat import (
     Undefined,
 )
-
-_Unset: Any = Undefined
+from .datastructures import _Unset
 
 
 class ParamTypes(Enum):
@@ -135,7 +134,7 @@ class Param(FieldInfo):  # type: ignore[misc]
         return f"{self.__class__.__name__}({self.default})"
 
 
-class Path(Param):  # type: ignore[misc]
+class Path(Param):  # type: ignore[misc]  # ty: ignore[unused-ignore-comment]
     in_ = ParamTypes.path
 
     def __init__(
@@ -219,7 +218,7 @@ class Path(Param):  # type: ignore[misc]
         )
 
 
-class Query(Param):  # type: ignore[misc]
+class Query(Param):  # type: ignore[misc]  # ty: ignore[unused-ignore-comment]
     in_ = ParamTypes.query
 
     def __init__(
@@ -301,7 +300,7 @@ class Query(Param):  # type: ignore[misc]
         )
 
 
-class Header(Param):  # type: ignore[misc]
+class Header(Param):  # type: ignore[misc]  # ty: ignore[unused-ignore-comment]
     in_ = ParamTypes.header
 
     def __init__(
@@ -385,7 +384,7 @@ class Header(Param):  # type: ignore[misc]
         )
 
 
-class Cookie(Param):  # type: ignore[misc]
+class Cookie(Param):  # type: ignore[misc]  # ty: ignore[unused-ignore-comment]
     in_ = ParamTypes.cookie
 
     def __init__(
@@ -579,7 +578,7 @@ class Body(FieldInfo):  # type: ignore[misc]
         return f"{self.__class__.__name__}({self.default})"
 
 
-class Form(Body):  # type: ignore[misc]
+class Form(Body):  # type: ignore[misc]  # ty: ignore[unused-ignore-comment]
     def __init__(
         self,
         default: Any = Undefined,
@@ -661,7 +660,7 @@ class Form(Body):  # type: ignore[misc]
         )
 
 
-class File(Form):  # type: ignore[misc]
+class File(Form):  # type: ignore[misc]  # ty: ignore[unused-ignore-comment]
     def __init__(
         self,
         default: Any = Undefined,
diff --git a/fastapi/routing.py b/fastapi/routing.py
index e2c83aa7b3..36acb6b89d 100644
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@@ -26,6 +26,7 @@ from typing import (
     Annotated,
     Any,
     TypeVar,
+    cast,
 )
 
 import anyio
@@ -75,6 +76,7 @@ from starlette import routing
 from starlette._exception_handler import wrap_app_handling_exceptions
 from starlette._utils import is_async_callable
 from starlette.concurrency import iterate_in_threadpool, run_in_threadpool
+from starlette.datastructures import FormData
 from starlette.exceptions import HTTPException
 from starlette.requests import Request
 from starlette.responses import JSONResponse, Response, StreamingResponse
@@ -100,8 +102,10 @@ def request_response(
     and returns an ASGI application.
     """
     f: Callable[[Request], Awaitable[Response]] = (
-        func if is_async_callable(func) else functools.partial(run_in_threadpool, func)  # type:ignore
-    )
+        func  # type: ignore[assignment]  # ty: ignore[unused-ignore-comment]
+        if is_async_callable(func)
+        else functools.partial(run_in_threadpool, func)  # type: ignore[call-arg]  # ty: ignore[unused-ignore-comment]
+    )  # ty: ignore[invalid-assignment]
 
     async def app(scope: Scope, receive: Receive, send: Send) -> None:
         request = Request(scope, receive, send)
@@ -453,7 +457,7 @@ def get_request_handler(
         solved_result = await solve_dependencies(
             request=request,
             dependant=dependant,
-            body=body,
+            body=cast(dict[str, Any] | FormData | bytes | None, body),
             dependency_overrides_provider=dependency_overrides_provider,
             async_exit_stack=async_exit_stack,
             embed_body_fields=embed_body_fields,
@@ -635,7 +639,7 @@ def get_request_handler(
                 else:
 
                     def _sync_stream_jsonl() -> Iterator[bytes]:
-                        for item in gen:
+                        for item in gen:  # ty: ignore[not-iterable]
                             yield _serialize_item(item)
 
                     jsonl_stream_content = _sync_stream_jsonl()
@@ -908,7 +912,7 @@ class APIRoute(routing.Route):
                 mode="serialization",
             )
         else:
-            self.response_field = None  # type: ignore
+            self.response_field = None  # type: ignore  # ty: ignore[unused-ignore-comment]
         if self.stream_item_type:
             stream_item_name = "StreamItem_" + self.unique_id
             self.stream_item_field: ModelField | None = create_model_field(
diff --git a/fastapi/security/api_key.py b/fastapi/security/api_key.py
index 89358a9136..83a4585a08 100644
--- a/fastapi/security/api_key.py
+++ b/fastapi/security/api_key.py
@@ -9,6 +9,8 @@ from starlette.status import HTTP_401_UNAUTHORIZED
 
 
 class APIKeyBase(SecurityBase):
+    model: APIKey
+
     def __init__(
         self,
         location: APIKeyIn,
@@ -20,7 +22,7 @@ class APIKeyBase(SecurityBase):
         self.auto_error = auto_error
 
         self.model: APIKey = APIKey(
-            **{"in": location},
+            **{"in": location},  # ty: ignore[invalid-argument-type]
             name=name,
             description=description,
         )
diff --git a/fastapi/security/http.py b/fastapi/security/http.py
index 05299323cb..228f2aa8ea 100644
--- a/fastapi/security/http.py
+++ b/fastapi/security/http.py
@@ -67,6 +67,8 @@ class HTTPAuthorizationCredentials(BaseModel):
 
 
 class HTTPBase(SecurityBase):
+    model: HTTPBaseModel
+
     def __init__(
         self,
         *,
@@ -75,9 +77,7 @@ class HTTPBase(SecurityBase):
         description: str | None = None,
         auto_error: bool = True,
     ):
-        self.model: HTTPBaseModel = HTTPBaseModel(
-            scheme=scheme, description=description
-        )
+        self.model = HTTPBaseModel(scheme=scheme, description=description)
         self.scheme_name = scheme_name or self.__class__.__name__
         self.auto_error = auto_error
 
diff --git a/pyproject.toml b/pyproject.toml
index da6bf9ead4..73d3929292 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -177,6 +177,7 @@ tests = [
     "pyyaml >=5.3.1,<7.0.0",
     "sqlmodel >=0.0.31",
     "strawberry-graphql >=0.200.0,<1.0.0",
+    "ty>=0.0.9",
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     "types-ujson >=5.10.0.20240515",
     "a2wsgi >=1.9.0,<=2.0.0",
diff --git a/uv.lock b/uv.lock
index e45d41cbf7..9a10d7bda6 100644
--- a/uv.lock
+++ b/uv.lock
@@ -469,7 +469,7 @@ wheels = [
 
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@@ -478,10 +478,7 @@ dependencies = [
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@@ -1161,6 +1158,7 @@ dev = [
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     { name = "sqlmodel" },
     { name = "strawberry-graphql" },
+    { name = "ty" },
     { name = "typer" },
     { name = "types-orjson" },
     { name = "types-ujson" },
@@ -1224,6 +1222,7 @@ tests = [
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     { name = "sqlmodel" },
     { name = "strawberry-graphql" },
+    { name = "ty" },
     { name = "types-orjson" },
     { name = "types-ujson" },
     { name = "ujson" },
@@ -1312,6 +1311,7 @@ dev = [
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     { name = "sqlmodel", specifier = ">=0.0.31" },
     { name = "strawberry-graphql", specifier = ">=0.200.0,<1.0.0" },
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@@ -1375,6 +1375,7 @@ tests = [
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     { name = "sqlmodel", specifier = ">=0.0.31" },
     { name = "strawberry-graphql", specifier = ">=0.200.0,<1.0.0" },
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     { name = "types-ujson", specifier = ">=5.10.0.20240515" },
     { name = "ujson", specifier = ">=5.8.0" },
@@ -4321,11 +4322,11 @@ wheels = [
 
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