diff --git a/optimum/exporters/onnx/model_configs.py b/optimum/exporters/onnx/model_configs.py
index 2fb2a5c2952..6c7dec773c4 100644
--- a/optimum/exporters/onnx/model_configs.py
+++ b/optimum/exporters/onnx/model_configs.py
@@ -2124,9 +2124,9 @@ def outputs(self) -> Dict[str, Dict[int, str]]:
             # for Speech2text, we need to name the second axis as
             # encoder_sequence_length / 2 * self._config.num_conv_layers as the axis name is
             # used for dummy input generation
-            common_outputs["last_hidden_state"][1] = (
-                f"{common_outputs['last_hidden_state'][1]} / {(2 * self._config.num_conv_layers)}"
-            )
+            common_outputs["last_hidden_state"][
+                1
+            ] = f"{common_outputs['last_hidden_state'][1]} / {(2 * self._config.num_conv_layers)}"
         return common_outputs