diff --git a/src/transformers/modeling_tf_utils.py b/src/transformers/modeling_tf_utils.py
index 3e47170e5d..dacf4cd752 100644
--- a/src/transformers/modeling_tf_utils.py
+++ b/src/transformers/modeling_tf_utils.py
@@ -32,7 +32,7 @@ from .modeling_tf_pytorch_utils import load_pytorch_checkpoint_in_tf2_model
 logger = logging.getLogger(__name__)
 
 
-class TFModelUtils:
+class TFModelUtilsMixin:
     """
     A few utilities for `tf.keras.Model`s, to be used as a mixin.
     """
@@ -47,7 +47,7 @@ class TFModelUtils:
             return self.count_params()
 
 
-class TFPreTrainedModel(tf.keras.Model, TFModelUtils):
+class TFPreTrainedModel(tf.keras.Model, TFModelUtilsMixin):
     r""" Base class for all TF models.
 
         :class:`~transformers.TFPreTrainedModel` takes care of storing the configuration of the models and handles methods for loading/downloading/saving models
diff --git a/src/transformers/modeling_utils.py b/src/transformers/modeling_utils.py
index f71c81b4a1..9543f3bdc0 100644
--- a/src/transformers/modeling_utils.py
+++ b/src/transformers/modeling_utils.py
@@ -53,7 +53,7 @@ except ImportError:
             return input
 
 
-class ModuleUtils:
+class ModuleUtilsMixin:
     """
     A few utilities for torch.nn.Modules, to be used as a mixin.
     """
@@ -66,7 +66,7 @@ class ModuleUtils:
         return sum(p.numel() for p in params)
 
 
-class PreTrainedModel(nn.Module, ModuleUtils):
+class PreTrainedModel(nn.Module, ModuleUtilsMixin):
     r""" Base class for all models.
 
         :class:`~transformers.PreTrainedModel` takes care of storing the configuration of the models and handles methods for loading/downloading/saving models
diff --git a/tests/test_modeling_common.py b/tests/test_modeling_common.py
index f5f93c7f07..77fb7252be 100644
--- a/tests/test_modeling_common.py
+++ b/tests/test_modeling_common.py
@@ -592,7 +592,6 @@ class ModelTesterMixin:
                 model(**inputs_dict)
 
 
-
 global_rng = random.Random()