diff --git a/tests/test_client.py b/tests/test_client.py
index c266b1b8..6cfd7173 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -712,7 +712,7 @@ def test_retrying_timeout_errors_doesnt_leak(self, respx_mock: MockRouter) -> No
         with pytest.raises(APITimeoutError):
             self.client.post(
                 "/customers",
-                body=dict(email="example-customer@withorb.com", name="My Customer"),
+                body=cast(object, dict(email="example-customer@withorb.com", name="My Customer")),
                 cast_to=httpx.Response,
                 options={"headers": {RAW_RESPONSE_HEADER: "stream"}},
             )
@@ -727,7 +727,7 @@ def test_retrying_status_errors_doesnt_leak(self, respx_mock: MockRouter) -> Non
         with pytest.raises(APIStatusError):
             self.client.post(
                 "/customers",
-                body=dict(email="example-customer@withorb.com", name="My Customer"),
+                body=cast(object, dict(email="example-customer@withorb.com", name="My Customer")),
                 cast_to=httpx.Response,
                 options={"headers": {RAW_RESPONSE_HEADER: "stream"}},
             )
@@ -1416,7 +1416,7 @@ async def test_retrying_timeout_errors_doesnt_leak(self, respx_mock: MockRouter)
         with pytest.raises(APITimeoutError):
             await self.client.post(
                 "/customers",
-                body=dict(email="example-customer@withorb.com", name="My Customer"),
+                body=cast(object, dict(email="example-customer@withorb.com", name="My Customer")),
                 cast_to=httpx.Response,
                 options={"headers": {RAW_RESPONSE_HEADER: "stream"}},
             )
@@ -1431,7 +1431,7 @@ async def test_retrying_status_errors_doesnt_leak(self, respx_mock: MockRouter)
         with pytest.raises(APIStatusError):
             await self.client.post(
                 "/customers",
-                body=dict(email="example-customer@withorb.com", name="My Customer"),
+                body=cast(object, dict(email="example-customer@withorb.com", name="My Customer")),
                 cast_to=httpx.Response,
                 options={"headers": {RAW_RESPONSE_HEADER: "stream"}},
             )