diff --git a/tests/test_serialize.py b/tests/test_serialize.py
index e27c39559f0..8ebe685316c 100644
--- a/tests/test_serialize.py
+++ b/tests/test_serialize.py
@@ -1009,17 +1009,26 @@ def test_annotated_computed_field_custom_serializer():
     class Model(BaseModel):
         x: int
 
+        @computed_field
+        @property
+        def two_x(self) -> Annotated[int, PlainSerializer(lambda v: f'The double of x is {v}', return_type=str)]:
+            return self.x * 2
+
         @computed_field(
-            return_type=Annotated[str, PlainSerializer(lambda v: f'The double of x is {v}', return_type=str)]
+            return_type=Annotated[int, PlainSerializer(lambda v: f'The quadruple of x is {v}', return_type=str)]
         )
         @property
-        def two_x(self) -> int:
-            return self.x * 2
+        def four_x(self) -> int:
+            return self.two_x * 2
 
     m = Model(x=1)
 
-    assert m.model_dump() == {'two_x': 'The double of x is 2', 'x': 1}
-    assert json.loads(m.model_dump_json()) == {'two_x': 'The double of x is 2', 'x': 1}
+    assert m.model_dump() == {'x': 1, 'two_x': 'The double of x is 2', 'four_x': 'The quadruple of x is 4'}
+    assert json.loads(m.model_dump_json()) == {
+        'x': 1,
+        'two_x': 'The double of x is 2',
+        'four_x': 'The quadruple of x is 4',
+    }
 
 
 def test_computed_field_custom_serializer_bad_signature():