[Flax test] Add require pytorch to flix flax test (#8816)

* try flax fix

* same for roberta

tests/test_modeling_flax_bert.py

@@ -48,6 +48,7 @@ class FlaxBertModelTest(unittest.TestCase):
 
 
 @require_flax
+@require_torch
 @pytest.mark.parametrize("jit", ["disable_jit", "enable_jit"])
 def test_multiple_sentences(jit):
     tokenizer = BertTokenizerFast.from_pretrained("bert-base-cased")

tests/test_modeling_flax_roberta.py

@@ -48,6 +48,7 @@ class FlaxRobertaModelTest(unittest.TestCase):
 
 
 @require_flax
+@require_torch
 @pytest.mark.parametrize("jit", ["disable_jit", "enable_jit"])
 def test_multiple_sentences(jit):
     tokenizer = RobertaTokenizerFast.from_pretrained("roberta-base")