diff --git a/pyproject.toml b/pyproject.toml
index dda47e24e..833bfe25b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -88,6 +88,7 @@ optional-dependencies.dev = [
     "sphinxcontrib-spelling==8",
     "sybil==6.1.1",
     "tenacity==9.0.0",
+    "typeguard==4.3.0",
     "types-docker==7.1.0.20240821",
     "types-pillow==10.2.0.20240520",
     "types-pyyaml==6.0.12.20240808",
@@ -322,6 +323,9 @@ keep_full_version = true
 
 xfail_strict = true
 log_cli = true
+typeguard-packages = """
+tests
+"""
 addopts = [
     "--strict-markers",
 ]
diff --git a/tests/mock_vws/test_add_target.py b/tests/mock_vws/test_add_target.py
index 3f549f013..52210a152 100644
--- a/tests/mock_vws/test_add_target.py
+++ b/tests/mock_vws/test_add_target.py
@@ -378,7 +378,7 @@ def test_name_valid(
         ],
     )
     def test_name_invalid(
-        name: str,
+        name: str | int | None,
         image_file_failed_state: io.BytesIO,
         status_code: int,
         vws_client: VWS,
@@ -392,7 +392,7 @@ def test_name_invalid(
                 expected_exception=OopsAnErrorOccurredPossiblyBadName,
             ) as oops_exc:
                 vws_client.add_target(
-                    name=name,
+                    name=name,  # type: ignore[arg-type]
                     width=1,
                     image=image_file_failed_state,
                     application_metadata=None,
@@ -404,7 +404,7 @@ def test_name_invalid(
 
         with pytest.raises(expected_exception=Fail) as exc:
             vws_client.add_target(
-                name=name,
+                name=name,  # type: ignore[arg-type]
                 width=1,
                 image=image_file_failed_state,
                 application_metadata=None,
diff --git a/tests/mock_vws/test_update_target.py b/tests/mock_vws/test_update_target.py
index 2b7b3faf2..4fd4000fa 100644
--- a/tests/mock_vws/test_update_target.py
+++ b/tests/mock_vws/test_update_target.py
@@ -545,7 +545,7 @@ def test_name_valid(
         ],
     )
     def test_name_invalid(
-        name: str,
+        name: str | int | None,
         target_id: str,
         vuforia_database: VuforiaDatabase,
         vws_client: VWS,