diff --git a/google/generativeai/types/generation_types.py b/google/generativeai/types/generation_types.py
index 42571bbe7..5a2012e64 100644
--- a/google/generativeai/types/generation_types.py
+++ b/google/generativeai/types/generation_types.py
@@ -532,7 +532,7 @@ def text(self):
                 texts.extend([f"```{outcome_result}", part.code_execution_result.output, "```"])
                 continue
 
-            part_type = protos.Part.pb(part).whichOneof("data")
+            part_type = protos.Part.pb(part).WhichOneof("data")
             raise ValueError(f"Could not convert `part.{part_type}` to text.")
 
         return "\n".join(texts)
diff --git a/tests/test_models.py b/tests/test_models.py
index c7cd1dbcd..6f10f9123 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -169,14 +169,6 @@ def test_max_temperature(self):
         model = models.get_base_model(name)
         self.assertEqual(max_temperature, model.max_temperature)
 
-    @parameterized.named_parameters(
-        ["simple", "mystery-bison-001"],
-        ["model-instance", protos.Model(name="how?-bison-001")],
-    )
-    def test_fail_with_unscoped_model_name(self, name):
-        with self.assertRaises(ValueError):
-            model = models.get_model(name)
-
     def test_list_models(self):
         # The low level lib wraps the response in an iterable, so this is a fair test.
         self.responses = {