diff --git a/conftest.py b/conftest.py
index 93484cd3e..72eedd78c 100644
--- a/conftest.py
+++ b/conftest.py
@@ -12,15 +12,6 @@
 
 from tests.mock_vws.utils.retries import RETRY_EXCEPTIONS
 
-
-@beartype
-def pytest_collection_modifyitems(items: list[pytest.Item]) -> None:
-    """Apply the beartype decorator to all collected test functions."""
-    for item in items:
-        if isinstance(item, pytest.Function):
-            item.obj = beartype(obj=item.obj)
-
-
 pytest_collect_file = Sybil(
     parsers=[
         DocTestParser(optionflags=ELLIPSIS),
diff --git a/pyproject.toml b/pyproject.toml
index 293256d0d..ec141ca87 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -77,6 +77,7 @@ optional-dependencies.dev = [
     "pyright==1.1.408",
     "pyroma==5.0.1",
     "pytest==9.0.3",
+    "pytest-beartype-tests",
     "pytest-retry==1.7.0",
     "pytest-xdist==3.8.0",
     "pyyaml==6.0.3",
@@ -114,6 +115,9 @@ optional-dependencies.release = [ "check-wheel-contents==0.6.3" ]
 urls.Documentation = "https://vws-python.github.io/vws-python-mock/"
 urls.Source = "https://github.com/VWS-Python/vws-python-mock"
 
+[dependency-groups]
+dev = []
+
 [tool.setuptools]
 zip-safe = false
 package-data.mock_vws = [
@@ -141,6 +145,7 @@ fallback_version = "0.0.0"
 version_scheme = "post-release"
 
 [tool.uv]
+sources.pytest-beartype-tests = { git = "https://github.com/adamtheturtle/pytest-beartype-tests.git", rev = "bc81d99" }
 sources.torch = { index = "pytorch-cpu" }
 sources.torchvision = { index = "pytorch-cpu" }
 index = [ { name = "pytorch-cpu", url = "https://download.pytorch.org/whl/cpu", explicit = true } ]