[FlaxSpeechEncoderDecoder] Fix feature extractor gradient test (#16407)

tests/speech_encoder_decoder/test_modeling_flax_speech_encoder_decoder.py

@@ -389,14 +389,14 @@ class FlaxEncoderDecoderMixin:
             feature_extractor_grads, feature_extractor_grads_frozen
         ):
             self.assertTrue((feature_extractor_grad_frozen == 0.0).all())
-            self.assert_difference(feature_extractor_grad, feature_extractor_grad_frozen, 1e-10)
+            self.assert_difference(feature_extractor_grad, feature_extractor_grad_frozen, 1e-5)
 
         # ensure that the gradients of all unfrozen layers remain equal, i.e. all layers excluding the frozen 'feature_extractor'
         grads = tuple(grads[k] for k in grads if "feature_extractor" not in k)
         grads_frozen = tuple(grads_frozen[k] for k in grads_frozen if "feature_extractor" not in k)
 
         for grad, grad_frozen in zip(grads, grads_frozen):
-            self.assert_almost_equals(grad, grad_frozen, 1e-10)
+            self.assert_almost_equals(grad, grad_frozen, 1e-5)
 
     def check_pt_flax_equivalence(self, pt_model, fx_model, inputs_dict):
 
@@ -507,7 +507,7 @@ class FlaxEncoderDecoderMixin:
         self.assertLessEqual(diff, tol, f"Difference between arrays is {diff} (>= {tol}).")
 
     def assert_difference(self, a: np.ndarray, b: np.ndarray, tol: float):
-        diff = np.abs((a - b)).min()
+        diff = np.abs((a - b)).max()
         self.assertGreaterEqual(diff, tol, f"Difference between arrays is {diff} (<= {tol}).")
 
     @is_pt_flax_cross_test