diff --git a/conftest.py b/conftest.py
index e8f679b7..f7b14d1d 100644
--- a/conftest.py
+++ b/conftest.py
@@ -32,8 +32,8 @@ def pytest_collection_modifyitems(items: list[pytest.Item]) -> None:
 ).pytest()
 
 
-@pytest.hookimpl(optionalhook=True)
 @beartype
+@pytest.hookimpl(optionalhook=True)
 def pytest_set_filtered_exceptions() -> tuple[type[Exception], ...]:
     """
     Return exceptions to retry on.
diff --git a/src/mock_vws/_constants.py b/src/mock_vws/_constants.py
index 84b22380..dc964520 100644
--- a/src/mock_vws/_constants.py
+++ b/src/mock_vws/_constants.py
@@ -4,7 +4,10 @@
 
 from enum import Enum
 
+from beartype import beartype
 
+
+@beartype
 class ResultCodes(Enum):
     """
     Constants representing various VWS result codes.
@@ -37,6 +40,7 @@ class ResultCodes(Enum):
     TOO_MANY_REQUESTS = "TooManyRequests"
 
 
+@beartype
 class TargetStatuses(Enum):
     """
     Constants representing VWS target statuses.
diff --git a/src/mock_vws/_flask_server/healthcheck.py b/src/mock_vws/_flask_server/healthcheck.py
index c4513fbf..a20f3a8c 100644
--- a/src/mock_vws/_flask_server/healthcheck.py
+++ b/src/mock_vws/_flask_server/healthcheck.py
@@ -7,7 +7,10 @@
 import sys
 from http import HTTPStatus
 
+from beartype import beartype
 
+
+@beartype
 def flask_app_healthy(port: int) -> bool:
     """
     Check if the Flask app is healthy.
diff --git a/src/mock_vws/_flask_server/target_manager.py b/src/mock_vws/_flask_server/target_manager.py
index 5ba64629..83afda03 100644
--- a/src/mock_vws/_flask_server/target_manager.py
+++ b/src/mock_vws/_flask_server/target_manager.py
@@ -30,6 +30,7 @@
 TARGET_MANAGER = TargetManager()
 
 
+@beartype
 class _TargetRaterChoice(StrEnum):
     """Target rater choices."""
 
@@ -48,6 +49,7 @@ def to_target_rater(self) -> TargetTrackingRater:
         return rater
 
 
+@beartype
 class TargetManagerSettings(BaseSettings):
     """Settings for the Target Manager Flask app."""
 
@@ -59,6 +61,7 @@ class TargetManagerSettings(BaseSettings):
     "/databases/<string:database_name>",
     methods=[HTTPMethod.DELETE],
 )
+@beartype
 def delete_database(database_name: str) -> Response:
     """
     Delete a database.
@@ -92,6 +95,7 @@ def get_databases() -> Response:
 
 
 @TARGET_MANAGER_FLASK_APP.route("/databases", methods=[HTTPMethod.POST])
+@beartype
 def create_database() -> Response:
     """
     Create a new database.
@@ -177,6 +181,7 @@ def create_database() -> Response:
     "/databases/<string:database_name>/targets",
     methods=[HTTPMethod.POST],
 )
+@beartype
 def create_target(database_name: str) -> Response:
     """
     Create a new target in a given database.
@@ -212,8 +217,9 @@ def create_target(database_name: str) -> Response:
 
 @TARGET_MANAGER_FLASK_APP.route(
     "/databases/<string:database_name>/targets/<string:target_id>",
-    methods=[HTTPMethod.DELETE],
+    methods={HTTPMethod.DELETE},
 )
+@beartype
 def delete_target(database_name: str, target_id: str) -> Response:
     """
     Delete a target.
diff --git a/src/mock_vws/_flask_server/vwq.py b/src/mock_vws/_flask_server/vwq.py
index 567b62ee..f0b7394c 100644
--- a/src/mock_vws/_flask_server/vwq.py
+++ b/src/mock_vws/_flask_server/vwq.py
@@ -32,6 +32,7 @@
 CLOUDRECO_FLASK_APP.config["PROPAGATE_EXCEPTIONS"] = True
 
 
+@beartype
 class _ImageMatcherChoice(StrEnum):
     """Image matcher choices."""
 
@@ -49,6 +50,7 @@ def to_image_matcher(self) -> ImageMatcher:
         return matcher
 
 
+@beartype
 class VWQSettings(BaseSettings):
     """Settings for the VWQ Flask app."""
 
@@ -76,6 +78,7 @@ def get_all_databases() -> set[VuforiaDatabase]:
 
 
 @CLOUDRECO_FLASK_APP.before_request
+@beartype
 def set_terminate_wsgi_input() -> None:
     """
     We set ``wsgi.input_terminated`` to ``True`` when going through
diff --git a/src/mock_vws/_flask_server/vws.py b/src/mock_vws/_flask_server/vws.py
index 4d6f28d3..d5913f47 100644
--- a/src/mock_vws/_flask_server/vws.py
+++ b/src/mock_vws/_flask_server/vws.py
@@ -46,6 +46,7 @@
 _LOGGER = logging.getLogger(name=__name__)
 
 
+@beartype
 class _ImageMatcherChoice(StrEnum):
     """Image matcher choices."""
 
@@ -63,6 +64,7 @@ def to_image_matcher(self) -> ImageMatcher:
         return matcher
 
 
+@beartype
 class VWSSettings(BaseSettings):
     """Settings for the VWS Flask app."""
 
@@ -151,6 +153,7 @@ def handle_exceptions(exc: ValidatorError) -> Response:
 
 
 @VWS_FLASK_APP.route("/targets", methods=[HTTPMethod.POST])
+@beartype
 def add_target() -> Response:
     """
     Add a target.
@@ -334,6 +337,7 @@ def delete_target(target_id: str) -> Response:
 
 
 @VWS_FLASK_APP.route("/summary", methods=[HTTPMethod.GET])
+@beartype
 def database_summary() -> Response:
     """
     Get a database summary report.
diff --git a/src/mock_vws/_query_validators/exceptions.py b/src/mock_vws/_query_validators/exceptions.py
index 48e8fb71..8a39d468 100644
--- a/src/mock_vws/_query_validators/exceptions.py
+++ b/src/mock_vws/_query_validators/exceptions.py
@@ -7,10 +7,13 @@
 import uuid
 from http import HTTPStatus
 
+from beartype import beartype
+
 from mock_vws._constants import ResultCodes
 from mock_vws._mock_common import json_dump
 
 
+@beartype
 class ValidatorError(Exception):
     """
     A base class for exceptions thrown from mock Vuforia cloud recognition
@@ -22,6 +25,7 @@ class ValidatorError(Exception):
     headers: dict[str, str]
 
 
+@beartype
 class DateHeaderNotGivenError(ValidatorError):
     """
     Exception raised when a date header is not given.
@@ -52,6 +56,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class DateFormatNotValidError(ValidatorError):
     """
     Exception raised when the date format is not valid.
@@ -83,6 +88,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class RequestTimeTooSkewedError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -118,6 +124,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class BadImageError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -160,6 +167,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class AuthenticationFailureError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -202,6 +210,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class AuthenticationFailureGoodFormattingError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -239,6 +248,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class ImageNotGivenError(ValidatorError):
     """
     Exception raised when an image is not given.
@@ -270,6 +280,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class AuthHeaderMissingError(ValidatorError):
     """
     Exception raised when an auth header is not given.
@@ -302,6 +313,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class MalformedAuthHeaderError(ValidatorError):
     """
     Exception raised when an auth header is not given.
@@ -335,6 +347,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class UnknownParametersError(ValidatorError):
     """
     Exception raised when unknown parameters are given.
@@ -366,6 +379,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class InactiveProjectError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -407,6 +421,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class InvalidMaxNumResultsError(ValidatorError):
     """
     Exception raised when an invalid value is given as the
@@ -443,6 +458,7 @@ def __init__(self, given_value: str) -> None:
         }
 
 
+@beartype
 class MaxNumResultsOutOfRangeError(ValidatorError):
     """
     Exception raised when an integer value is given as the "max_num_results"
@@ -479,6 +495,7 @@ def __init__(self, given_value: str) -> None:
         }
 
 
+@beartype
 class InvalidIncludeTargetDataError(ValidatorError):
     """
     Exception raised when an invalid value is given as the
@@ -517,6 +534,7 @@ def __init__(self, given_value: str) -> None:
         }
 
 
+@beartype
 class UnsupportedMediaTypeError(ValidatorError):
     """
     Exception raised when no boundary is found for multipart data.
@@ -547,6 +565,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class InvalidAcceptHeaderError(ValidatorError):
     """
     Exception raised when there is an invalid accept header given.
@@ -577,6 +596,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class NoBoundaryFoundError(ValidatorError):
     """
     Exception raised when an invalid media type is given.
@@ -611,6 +631,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class ContentLengthHeaderTooLargeError(ValidatorError):
     """
     Exception raised when the given content length header is too large.
@@ -634,6 +655,7 @@ def __init__(self) -> None:  # pragma: no cover
         }
 
 
+@beartype
 class ContentLengthHeaderNotIntError(ValidatorError):
     """
     Exception raised when the given content length header is not an integer.
@@ -656,6 +678,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class RequestEntityTooLargeError(ValidatorError):
     """
     Exception raised when the given image file size is too large.
@@ -699,6 +722,7 @@ def __init__(self) -> None:  # pragma: no cover
         }
 
 
+@beartype
 class NoContentTypeError(ValidatorError):
     """
     Exception raised when a content type is either not given or is empty.
diff --git a/src/mock_vws/_requests_mock_server/decorators.py b/src/mock_vws/_requests_mock_server/decorators.py
index 1c856e9d..69f6c149 100644
--- a/src/mock_vws/_requests_mock_server/decorators.py
+++ b/src/mock_vws/_requests_mock_server/decorators.py
@@ -8,6 +8,7 @@
 from urllib.parse import urljoin, urlparse
 
 import requests
+from beartype import BeartypeConf, beartype
 from responses import RequestsMock
 
 from mock_vws.database import VuforiaDatabase
@@ -28,6 +29,7 @@
 _BRISQUE_TRACKING_RATER = BrisqueTargetTrackingRater()
 
 
+@beartype(conf=BeartypeConf(is_pep484_tower=True))
 class MockVWS(ContextDecorator):
     """
     Route requests to Vuforia's Web Service APIs to fakes of those APIs.
@@ -86,7 +88,7 @@ def __init__(
 
         self._mock_vws_api = MockVuforiaWebServicesAPI(
             target_manager=self._target_manager,
-            processing_time_seconds=processing_time_seconds,
+            processing_time_seconds=float(processing_time_seconds),
             duplicate_match_checker=duplicate_match_checker,
             target_tracking_rater=target_tracking_rater,
         )
diff --git a/src/mock_vws/_requests_mock_server/mock_web_query_api.py b/src/mock_vws/_requests_mock_server/mock_web_query_api.py
index 13ba6cef..cc6871b8 100644
--- a/src/mock_vws/_requests_mock_server/mock_web_query_api.py
+++ b/src/mock_vws/_requests_mock_server/mock_web_query_api.py
@@ -9,6 +9,7 @@
 from collections.abc import Callable
 from http import HTTPMethod, HTTPStatus
 
+from beartype import beartype
 from requests.models import PreparedRequest
 
 from mock_vws._mock_common import Route
@@ -27,6 +28,7 @@
 _ResponseType = tuple[int, dict[str, str], str]
 
 
+@beartype
 def route(
     path_pattern: str,
     http_methods: set[str],
@@ -66,6 +68,7 @@ def decorator(
     return decorator
 
 
+@beartype
 def _body_bytes(request: PreparedRequest) -> bytes:
     """
     Return the body of a request as bytes.
@@ -77,6 +80,7 @@ def _body_bytes(request: PreparedRequest) -> bytes:
     return request.body
 
 
+@beartype
 class MockVuforiaWebQueryAPI:
     """
     A fake implementation of the Vuforia Web Query API.
diff --git a/src/mock_vws/_requests_mock_server/mock_web_services_api.py b/src/mock_vws/_requests_mock_server/mock_web_services_api.py
index bcd6bfb2..36936c03 100644
--- a/src/mock_vws/_requests_mock_server/mock_web_services_api.py
+++ b/src/mock_vws/_requests_mock_server/mock_web_services_api.py
@@ -59,6 +59,7 @@ def route(
         A decorator which takes methods and makes them recognizable as routes.
     """
 
+    @beartype
     def decorator(
         method: Callable[..., _ResponseType],
     ) -> Callable[..., _ResponseType]:
@@ -82,6 +83,7 @@ def decorator(
     return decorator
 
 
+@beartype
 def _body_bytes(request: PreparedRequest) -> bytes:
     """
     Return the body of a request as bytes.
@@ -96,7 +98,7 @@ def _body_bytes(request: PreparedRequest) -> bytes:
     return request.body
 
 
-@beartype
+@beartype(conf=BeartypeConf(is_pep484_tower=True))
 class MockVuforiaWebServicesAPI:
     """
     A fake implementation of the Vuforia Web Services API.
@@ -104,7 +106,6 @@ class MockVuforiaWebServicesAPI:
     This implementation is tied to the implementation of ``responses``.
     """
 
-    @beartype(conf=BeartypeConf(is_pep484_tower=True))
     def __init__(
         self,
         *,
diff --git a/src/mock_vws/_services_validators/exceptions.py b/src/mock_vws/_services_validators/exceptions.py
index 8fc8fc4b..f528f1bf 100644
--- a/src/mock_vws/_services_validators/exceptions.py
+++ b/src/mock_vws/_services_validators/exceptions.py
@@ -8,10 +8,13 @@
 from http import HTTPStatus
 from pathlib import Path
 
+from beartype import beartype
+
 from mock_vws._constants import ResultCodes
 from mock_vws._mock_common import json_dump
 
 
+@beartype
 class ValidatorError(Exception):
     """
     A base class for exceptions thrown from mock Vuforia services endpoints.
@@ -22,6 +25,7 @@ class ValidatorError(Exception):
     headers: dict[str, str]
 
 
+@beartype
 class UnknownTargetError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -61,6 +65,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class ProjectInactiveError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -100,6 +105,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class AuthenticationFailureError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -139,6 +145,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class FailError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code 'Fail'.
@@ -177,6 +184,7 @@ def __init__(self, *, status_code: HTTPStatus) -> None:
         }
 
 
+@beartype
 class MetadataTooLargeError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -216,6 +224,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class TargetNameExistError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -255,6 +264,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class OopsErrorOccurredResponseError(ValidatorError):
     """
     Exception raised when VWS returns an HTML page which says "Oops, an error
@@ -296,6 +306,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class BadImageError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -335,6 +346,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class ImageTooLargeError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -374,6 +386,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class RequestTimeTooSkewedError(ValidatorError):
     """
     Exception raised when Vuforia returns a response with a result code
@@ -413,6 +426,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class ContentLengthHeaderTooLargeError(ValidatorError):
     """
     Exception raised when the given content length header is too large.
@@ -444,6 +458,7 @@ def __init__(self) -> None:  # pragma: no cover
         }
 
 
+@beartype
 class ContentLengthHeaderNotIntError(ValidatorError):
     """
     Exception raised when the given content length header is not an integer.
@@ -483,6 +498,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class UnnecessaryRequestBodyError(ValidatorError):
     """
     Exception raised when a request body is given but not necessary.
@@ -512,6 +528,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class TargetStatusNotSuccessError(ValidatorError):
     """
     Exception raised when trying to update a target that does not have a
@@ -551,6 +568,7 @@ def __init__(self) -> None:
         }
 
 
+@beartype
 class TargetStatusProcessingError(ValidatorError):
     """
     Exception raised when trying to delete a target which is processing.
diff --git a/src/mock_vws/database.py b/src/mock_vws/database.py
index 75f68edb..153c8f58 100644
--- a/src/mock_vws/database.py
+++ b/src/mock_vws/database.py
@@ -13,6 +13,7 @@
 from mock_vws.target import Target, TargetDict
 
 
+@beartype
 class DatabaseDict(TypedDict):
     """
     A dictionary type which represents a database.
@@ -76,7 +77,6 @@ class VuforiaDatabase:
     total_recos: int = 0
     target_quota: int = 1000
 
-    @beartype
     def to_dict(self) -> DatabaseDict:
         """
         Dump a target to a dictionary which can be loaded as JSON.
@@ -92,7 +92,6 @@ def to_dict(self) -> DatabaseDict:
             "targets": targets,
         }
 
-    @beartype
     def get_target(self, target_id: str) -> Target:
         """
         Return a target from the database with the given ID.
@@ -121,7 +120,6 @@ def from_dict(cls, database_dict: DatabaseDict) -> Self:
         )
 
     @property
-    @beartype
     def not_deleted_targets(self) -> set[Target]:
         """
         All targets which have not been deleted.
@@ -129,7 +127,6 @@ def not_deleted_targets(self) -> set[Target]:
         return {target for target in self.targets if not target.delete_date}
 
     @property
-    @beartype
     def active_targets(self) -> set[Target]:
         """
         All active targets.
@@ -142,7 +139,6 @@ def active_targets(self) -> set[Target]:
         }
 
     @property
-    @beartype
     def inactive_targets(self) -> set[Target]:
         """
         All inactive targets.
@@ -155,7 +151,6 @@ def inactive_targets(self) -> set[Target]:
         }
 
     @property
-    @beartype
     def failed_targets(self) -> set[Target]:
         """
         All failed targets.
@@ -167,7 +162,6 @@ def failed_targets(self) -> set[Target]:
         }
 
     @property
-    @beartype
     def processing_targets(self) -> set[Target]:
         """
         All processing targets.
diff --git a/src/mock_vws/image_matchers.py b/src/mock_vws/image_matchers.py
index 7b1c834d..5768ad8b 100644
--- a/src/mock_vws/image_matchers.py
+++ b/src/mock_vws/image_matchers.py
@@ -33,10 +33,10 @@ def __call__(
         ...  # pylint: disable=unnecessary-ellipsis
 
 
+@beartype
 class ExactMatcher:
     """A matcher which returns whether two images are exactly equal."""
 
-    @beartype
     def __call__(
         self,
         first_image_content: bytes,
@@ -52,10 +52,10 @@ def __call__(
         return bool(first_image_content == second_image_content)
 
 
+@beartype
 class StructuralSimilarityMatcher:
     """A matcher which returns whether two images are similar using SSIM."""
 
-    @beartype
     def __call__(
         self,
         first_image_content: bytes,
diff --git a/src/mock_vws/states.py b/src/mock_vws/states.py
index 53654d67..c3f55b01 100644
--- a/src/mock_vws/states.py
+++ b/src/mock_vws/states.py
@@ -4,7 +4,10 @@
 
 from enum import StrEnum, auto
 
+from beartype import beartype
 
+
+@beartype
 class States(StrEnum):
     """
     Constants representing various web service states.
diff --git a/src/mock_vws/target.py b/src/mock_vws/target.py
index d1185bac..67419ec8 100644
--- a/src/mock_vws/target.py
+++ b/src/mock_vws/target.py
@@ -11,7 +11,7 @@
 from typing import Self, TypedDict
 from zoneinfo import ZoneInfo
 
-from beartype import beartype
+from beartype import BeartypeConf, beartype
 from PIL import Image, ImageStat
 
 from mock_vws._constants import TargetStatuses
@@ -39,6 +39,7 @@ class TargetDict(TypedDict):
     tracking_rating: int
 
 
+@beartype
 def _random_hex() -> str:
     """
     Return a random hex value.
@@ -46,6 +47,7 @@ def _random_hex() -> str:
     return uuid.uuid4().hex
 
 
+@beartype
 def _time_now() -> datetime.datetime:
     """
     Return the current time in the GMT time zone.
@@ -54,6 +56,7 @@ def _time_now() -> datetime.datetime:
     return datetime.datetime.now(tz=gmt)
 
 
+@beartype(conf=BeartypeConf(is_pep484_tower=True))
 @dataclass(frozen=True, eq=True)
 class Target:
     """
@@ -78,7 +81,6 @@ class Target:
     upload_date: datetime.datetime = field(default_factory=_time_now)
 
     @property
-    @beartype
     def _post_processing_status(self) -> TargetStatuses:
         """
         Return the status of the target, or what it will be when processing is
@@ -102,7 +104,6 @@ def _post_processing_status(self) -> TargetStatuses:
         return TargetStatuses.FAILED
 
     @property
-    @beartype
     def status(self) -> str:
         """
         Return the status of the target.
@@ -128,13 +129,11 @@ def status(self) -> str:
         return self._post_processing_status.value
 
     @property
-    @beartype
     def _post_processing_target_rating(self) -> int:
         """The rating of the target after processing."""
         return self.target_tracking_rater(image_content=self.image_value)
 
     @property
-    @beartype
     def tracking_rating(self) -> int:
         """
         Return the tracking rating of the target recognition image.
diff --git a/src/mock_vws/target_manager.py b/src/mock_vws/target_manager.py
index 75ed7486..fb8543c2 100644
--- a/src/mock_vws/target_manager.py
+++ b/src/mock_vws/target_manager.py
@@ -13,14 +13,12 @@ class TargetManager:
     A target manager as per https://developer.vuforia.com/target-manager.
     """
 
-    @beartype
     def __init__(self) -> None:
         """
         Create a target manager with no databases.
         """
         self._databases: set[VuforiaDatabase] = set()
 
-    @beartype
     def remove_database(self, database: VuforiaDatabase) -> None:
         """
         Remove a cloud database.
@@ -33,7 +31,6 @@ def remove_database(self, database: VuforiaDatabase) -> None:
         """
         self._databases.remove(database)
 
-    @beartype
     def add_database(self, database: VuforiaDatabase) -> None:
         """
         Add a cloud database.
@@ -84,8 +81,6 @@ def add_database(self, database: VuforiaDatabase) -> None:
         self._databases.add(database)
 
     @property
-    @beartype
-    @beartype
     def databases(self) -> set[VuforiaDatabase]:
         """
         All cloud databases.
diff --git a/src/mock_vws/target_raters.py b/src/mock_vws/target_raters.py
index d0012e36..dc7542f4 100644
--- a/src/mock_vws/target_raters.py
+++ b/src/mock_vws/target_raters.py
@@ -59,6 +59,7 @@ def __call__(self, image_content: bytes) -> int:
         ...  # pylint: disable=unnecessary-ellipsis
 
 
+@beartype
 class RandomTargetTrackingRater:
     """A rater which returns a random number."""
 
@@ -73,6 +74,7 @@ def __call__(self, image_content: bytes) -> int:
         return secrets.randbelow(exclusive_upper_bound=6)
 
 
+@beartype
 class HardcodedTargetTrackingRater:
     """A rater which returns a hardcoded number."""
 
@@ -94,6 +96,7 @@ def __call__(self, image_content: bytes) -> int:
         return self._rating
 
 
+@beartype
 class BrisqueTargetTrackingRater:
     """A rater which returns a rating based on a BRISQUE score."""