diff --git a/egs/librispeech/ASR/zipformer/zipformer.py b/egs/librispeech/ASR/zipformer/zipformer.py
index 1edf2eff42..2a0ae01297 100644
--- a/egs/librispeech/ASR/zipformer/zipformer.py
+++ b/egs/librispeech/ASR/zipformer/zipformer.py
@@ -2460,4 +2460,3 @@ def _test_zipformer_main(causal: bool = False):
     torch.set_num_interop_threads(1)
     _test_zipformer_main(False)
     _test_zipformer_main(True)
-