diff --git a/src/transformers/tokenization_utils_base.py b/src/transformers/tokenization_utils_base.py
index 3648f5e99b..4330ae0a36 100644
--- a/src/transformers/tokenization_utils_base.py
+++ b/src/transformers/tokenization_utils_base.py
@@ -1781,6 +1781,8 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
                 padding_strategy = PaddingStrategy.LONGEST  # Default to pad to the longest sequence in the batch
             elif not isinstance(padding, PaddingStrategy):
                 padding_strategy = PaddingStrategy(padding)
+            elif isinstance(padding, PaddingStrategy):
+                padding_strategy = padding
         else:
             padding_strategy = PaddingStrategy.DO_NOT_PAD
 
@@ -1806,6 +1808,8 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
                 )  # Default to truncate the longest sequences in pairs of inputs
             elif not isinstance(truncation, TruncationStrategy):
                 truncation_strategy = TruncationStrategy(truncation)
+            elif isinstance(truncation, TruncationStrategy):
+                truncation_strategy = truncation
         else:
             truncation_strategy = TruncationStrategy.DO_NOT_TRUNCATE