diff --git a/tensorflow/python/keras/engine/training_utils.py b/tensorflow/python/keras/engine/training_utils.py
index 9a2023a26fe..64be9eafeb1 100644
--- a/tensorflow/python/keras/engine/training_utils.py
+++ b/tensorflow/python/keras/engine/training_utils.py
@@ -537,16 +537,17 @@ def standardize_sample_or_class_weights(x_weight, output_names, weight_type):
   Raises:
       ValueError: In case of invalid user-provided argument.
   """
-  if x_weight is None or (isinstance(x_weight, list) and len(x_weight) == 0):  # pylint: disable=g-explicit-length-test
+  if x_weight is None or (isinstance(x_weight, (list, tuple)) and
+                          len(x_weight) == 0):  # pylint: disable=g-explicit-length-test
     return [None for _ in output_names]
   if len(output_names) == 1:
-    if isinstance(x_weight, list) and len(x_weight) == 1:
+    if isinstance(x_weight, (list, tuple)) and len(x_weight) == 1:
       return x_weight
     if isinstance(x_weight, dict) and output_names[0] in x_weight:
       return [x_weight[output_names[0]]]
     else:
       return [x_weight]
-  if isinstance(x_weight, list):
+  if isinstance(x_weight, (list, tuple)):
     if len(x_weight) != len(output_names):
       raise ValueError('Provided `' + weight_type + '` was a list of ' +
                        str(len(x_weight)) + ' elements, but the model has ' +