diff --git a/egs/librispeech/ASR/pruned_transducer_stateless/decode.py b/egs/librispeech/ASR/pruned_transducer_stateless/decode.py
index b11fb960a5..3977f8443b 100755
--- a/egs/librispeech/ASR/pruned_transducer_stateless/decode.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless/decode.py
@@ -511,7 +511,7 @@ def decode_dataset(
     sp: spm.SentencePieceProcessor,
     word_table: Optional[k2.SymbolTable] = None,
     decoding_graph: Optional[k2.Fsa] = None,
-) -> Dict[str, List[str, Tuple[str, List[str], List[str]]]]:
+) -> Dict[str, List[Tuple[str, List[str], List[str]]]]:
     """Decode dataset.
 
     Args:
@@ -585,7 +585,7 @@ def decode_dataset(
 def save_results(
     params: AttributeDict,
     test_set_name: str,
-    results_dict: Dict[str, List[str, Tuple[str, List[str], List[str]]]],
+    results_dict: Dict[str, List[Tuple[str, List[str], List[str]]]],
 ):
     test_set_wers = dict()
     for key, results in results_dict.items():
diff --git a/egs/librispeech/ASR/pruned_transducer_stateless3/train.py b/egs/librispeech/ASR/pruned_transducer_stateless3/train.py
index a8fd527d57..a74975caff 100755
--- a/egs/librispeech/ASR/pruned_transducer_stateless3/train.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless3/train.py
@@ -327,9 +327,8 @@ def get_parser():
         default=0.5,
         help="The probability to select a batch from the GigaSpeech dataset",
     )
-    
+
     add_model_arguments(parser)
-    
     return parser
 
 
diff --git a/egs/librispeech/ASR/pruned_transducer_stateless4/decode.py b/egs/librispeech/ASR/pruned_transducer_stateless4/decode.py
index b75a72a156..873892bb91 100755
--- a/egs/librispeech/ASR/pruned_transducer_stateless4/decode.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless4/decode.py
@@ -612,7 +612,7 @@ def decode_dataset(
 def save_results(
     params: AttributeDict,
     test_set_name: str,
-    results_dict: Dict[str, List[str, Tuple[List[str], List[str]]]],
+    results_dict: Dict[str, List[Tuple[str, List[str], List[str]]]],
 ):
     test_set_wers = dict()
     for key, results in results_dict.items():
diff --git a/egs/librispeech/ASR/transducer/decode.py b/egs/librispeech/ASR/transducer/decode.py
index 24f243974b..5f233df87e 100755
--- a/egs/librispeech/ASR/transducer/decode.py
+++ b/egs/librispeech/ASR/transducer/decode.py
@@ -327,7 +327,7 @@ def decode_dataset(
 def save_results(
     params: AttributeDict,
     test_set_name: str,
-    results_dict: Dict[str, List[str, Tuple[List[str], List[str]]]],
+    results_dict: Dict[str, List[Tuple[str, List[str], List[str]]]],
 ):
     test_set_wers = dict()
     for key, results in results_dict.items():