[Generation, Gemma 3] When passing a custom generation_config, overwrite default values with the model's base generation_config (#36684)

tests/models/recurrent_gemma/test_modeling_recurrent_gemma.py

@@ -16,6 +16,8 @@
 
 import unittest
 
+import pytest
+
 from transformers import AutoModelForCausalLM, AutoTokenizer, RecurrentGemmaConfig, is_torch_available, set_seed
 from transformers.testing_utils import (
     require_bitsandbytes,
@@ -375,6 +377,7 @@ class RecurrentGemmaModelTest(ModelTesterMixin, PipelineTesterMixin, unittest.Te
     def test_model_parallel_beam_search(self):
         pass
 
+    @pytest.mark.generate
     @unittest.skip(reason="Rely on `past_key_values` to crop the assistant pkv. Not supported")
     def test_assisted_decoding_matches_greedy_search(self):
         pass
@@ -383,6 +386,7 @@ class RecurrentGemmaModelTest(ModelTesterMixin, PipelineTesterMixin, unittest.Te
     def test_left_padding_compatibility(self):
         pass
 
+    @pytest.mark.generate
     @unittest.skip(reason="Relies on `past_key_values` returned by the model. Not supported with recurrent gemma")
     def test_assisted_decoding_sample(self):
         pass