diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 443cad330..06a49c640 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -307,6 +307,16 @@ repos:
         stages: [pre-commit]
         require_serial: true
 
+      - id: no-defaults
+        name: no-defaults
+        entry: uv run --extra=dev no-defaults
+        language: python
+        types_or: [python]
+        additional_dependencies:
+          - *uv_version
+        stages: [pre-commit]
+        require_serial: true
+
       - id: doc8
         name: doc8
         entry: uv run --extra=dev -m doc8
diff --git a/pyproject.toml b/pyproject.toml
index 9fca132ed..72494639c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,6 +64,7 @@ optional-dependencies.dev = [
     "interrogate==1.7.0",
     "mypy[faster-cache]==2.3.0",
     "mypy-strict-kwargs==2026.7.19.1",
+    "no-defaults==1.0.1",
     "prek==0.4.11",
     "pydocstringformatter==1.0.0",
     "pydocstyle==6.3",
@@ -194,6 +195,7 @@ lint.per-file-ignores."tests/**" = [
 lint.unfixable = [
     "ERA001",
 ]
+lint.external = [ "NOD" ]
 lint.flake8-tidy-imports.banned-api."typing.cast".msg = "typing.cast is banned: use explicit type narrowing or a typed variable instead."
 lint.pydocstyle.convention = "google"
 
@@ -525,3 +527,7 @@ ignore_path = [
 [tool.yamlfix]
 section_whitelines = 1
 whitelines = 1
+
+[tool.no_defaults]
+private_only = true
+per_file_enforcement."tests/**" = "all"
diff --git a/src/mock_vws/_services_validators/request_rate_validators.py b/src/mock_vws/_services_validators/request_rate_validators.py
index ffa86297e..c243039fc 100644
--- a/src/mock_vws/_services_validators/request_rate_validators.py
+++ b/src/mock_vws/_services_validators/request_rate_validators.py
@@ -25,7 +25,7 @@ class RequestRateLimiter:
     def __init__(
         self,
         *,
-        time_function: Callable[[], float] = time.monotonic,
+        time_function: Callable[[], float] = time.monotonic,  # noqa: NOD001
     ) -> None:
         """Initialize an empty rate limiter."""
         self._request_times: dict[str, deque[float]] = {}
diff --git a/src/mock_vws/decorators.py b/src/mock_vws/decorators.py
index e4a82d0b6..e64c72165 100644
--- a/src/mock_vws/decorators.py
+++ b/src/mock_vws/decorators.py
@@ -58,23 +58,23 @@ class MockVWS(ContextDecorator):
     def __init__(
         self,
         *,
-        base_vws_url: str = "https://vws.vuforia.com",
-        base_vwq_url: str = "https://cloudreco.vuforia.com",
-        cloud_query_failure_response: CloudQueryFailureResponse | None = None,
-        duplicate_match_checker: ImageMatcher = _STRUCTURAL_SIMILARITY_MATCHER,
-        query_match_checker: ImageMatcher = _STRUCTURAL_SIMILARITY_MATCHER,
-        processing_time_seconds: float = 2.0,
+        base_vws_url: str = "https://vws.vuforia.com",  # noqa: NOD001
+        base_vwq_url: str = "https://cloudreco.vuforia.com",  # noqa: NOD001
+        cloud_query_failure_response: CloudQueryFailureResponse | None = None,  # noqa: NOD001
+        duplicate_match_checker: ImageMatcher = _STRUCTURAL_SIMILARITY_MATCHER,  # noqa: NOD001
+        query_match_checker: ImageMatcher = _STRUCTURAL_SIMILARITY_MATCHER,  # noqa: NOD001
+        processing_time_seconds: float = 2.0,  # noqa: NOD001
         model_target_generation_failure: (
             ModelTargetGenerationFailure | None
-        ) = None,
+        ) = None,  # noqa: NOD001
         model_target_generation_warning: (
             ModelTargetGenerationWarning | None
-        ) = None,
-        target_tracking_rater: TargetTrackingRater = _BRISQUE_TRACKING_RATER,
-        real_http: bool = False,
-        response_delay_seconds: float = 0.0,
-        sleep_fn: Callable[[float], None] = time.sleep,
-        vumark_generation_failure: VuMarkGenerationFailure | None = None,
+        ) = None,  # noqa: NOD001
+        target_tracking_rater: TargetTrackingRater = _BRISQUE_TRACKING_RATER,  # noqa: NOD001
+        real_http: bool = False,  # noqa: NOD001
+        response_delay_seconds: float = 0.0,  # noqa: NOD001
+        sleep_fn: Callable[[float], None] = time.sleep,  # noqa: NOD001
+        vumark_generation_failure: VuMarkGenerationFailure | None = None,  # noqa: NOD001
     ) -> None:
         """Route requests to Vuforia's Web Service APIs to fakes of those
         APIs.