diff --git a/tests/test_http_request.py b/tests/test_http_request.py
index 6dc9ec8b7..d1c435468 100644
--- a/tests/test_http_request.py
+++ b/tests/test_http_request.py
@@ -1642,6 +1642,26 @@ class JsonRequestTest(RequestTest):
             self.assertEqual(kwargs["ensure_ascii"], True)
             self.assertEqual(kwargs["allow_nan"], True)
 
+    def test_replacement_both_body_and_data_warns(self):
+        """Test that we can get a warning if both body and data are passed for branch coverage"""
+        body1 = None
+        body2 = b"body"
+        data1 = {
+            "name1": "value1",
+        }
+        data2 = {
+            "name2": "value2",
+        }
+        r1 = self.request_class(url="http://www.example.com/", data=data1, body=body1)
+
+        with mock.patch("warnings.warn") as mock_warn:
+            r1.replace(data=data2, body=body2)
+            mock_warn.assert_called_once()
+            (warning_message,), _ = mock_warn.call_args
+            self.assertIn(
+                "Both body and data passed. data will be ignored", warning_message
+            )
+
     def tearDown(self):
         warnings.resetwarnings()
         super().tearDown()